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Androgens, Oestrogens, ProgestinsAndrogens, Oestrogens, Progestins
and Hormonal Contraceptivesand Hormonal Contraceptives
Dr. D. K. BrahmaDr. D. K. Brahma
Associate ProfessorAssociate Professor
Department of PharmacologyDepartment of Pharmacology
NEIGRIHMS, ShillongNEIGRIHMS, Shillong
IntroductionIntroduction
 Substances which cause secondary sex characteristicsSubstances which cause secondary sex characteristics
in Malein Male
 Natural Androgens:Natural Androgens:

From Testes:From Testes:
• Testosterone (5-12 mg daily)Testosterone (5-12 mg daily)
• Dihydrotestosterone (more active) by 5Dihydrotestosterone (more active) by 5 αα-reductase-reductase

From Adrenal cortex: (weak androgens)From Adrenal cortex: (weak androgens)
• DehydroepiandrosteroneDehydroepiandrosterone
• AndrostenedioneAndrostenedione
{Females – 0.25 – 0.5 mg/day (ovary + adrenals)}{Females – 0.25 – 0.5 mg/day (ovary + adrenals)}

Androsterone – metabolite of testosteroneAndrosterone – metabolite of testosterone
 Synthetic androgens:Synthetic androgens:

Methyltestosterone, FluoxymesteroneMethyltestosterone, Fluoxymesterone

Propionate and enanthatePropionate and enanthate
TestosteroneTestosterone
 Produced from cholesterol primarily by Leydig cells in testesProduced from cholesterol primarily by Leydig cells in testes
 Secreted at adult levels during 1st trimesterSecreted at adult levels during 1st trimester11, during neonatal life, during neonatal life22,,
continually after pubertycontinually after puberty33
 Bound in plasma to albumin & sex hormone binding globulinBound in plasma to albumin & sex hormone binding globulin
(SHBG)(SHBG)
 Can be converted to the more potent, 5α-dihydrotestosteroneCan be converted to the more potent, 5α-dihydrotestosterone
(DHT), which is responsible for many of the responses to(DHT), which is responsible for many of the responses to
testosterone in the urogenital tract (e.g. prostate gland hyperplasia)testosterone in the urogenital tract (e.g. prostate gland hyperplasia)
 Binds to and activates a single androgen receptor (AR)Binds to and activates a single androgen receptor (AR)
 Androgen receptors are present in many tissues includingAndrogen receptors are present in many tissues including
reproductive tissue, skeletal muscle, brain, kidney etc.reproductive tissue, skeletal muscle, brain, kidney etc.
1 2 3
Testosterone 17-alkyl substitution Methyltestosterone
Fluoxymesterone
• All androgens contain a Testosterone structures
• Testosterone has 19-carbons and in general its a steroidal
structure
Cholesterol
Pregnenolone
Progesterone
Corticosterone
11-Desoxy-
corticosterone
18-Hydroxy-
corticosterone
ALDOSTERONE
17-α- Hydroxy
pregnenolone
11- Desoxy-
cortisol
17- Hydroxy
progesterone
21,β hydroxylase
CORTISOL
11,β hydroxylase
Dehydro-epi
androsterone
Andro-
stenedione
Oestrone
Oestriol
TESTOSTERONE OESTRADIOL
ACTH
Regulation of SecretionRegulation of Secretion
• LH – Testosterone secretion
• FSH – Spermatogenesis
• High testosterone – inhibits LH
• Estrogen – feedback inhibition
• Inhibin – FSH inhibition
• Plasma level of Testosterone:
0.3 to 1 mcg/dl (male)
20 to 60 ng/dl (female)
Biological Effects - TestosteroneBiological Effects - Testosterone
Androgenic Effects:Androgenic Effects:
 In the foetus, testosterone promotes development of maleIn the foetus, testosterone promotes development of male
reproductive tract – internal genitalia, vas deferens, epididymis andreproductive tract – internal genitalia, vas deferens, epididymis and
external genitalia (sex differentiation)external genitalia (sex differentiation)
 During puberty, testosterone promotes development of :During puberty, testosterone promotes development of :

primary sexual characteristics (e.g. enlargement of penis, scrotum andprimary sexual characteristics (e.g. enlargement of penis, scrotum and
testes)testes)

secondary sexual characteristics (e.g. male body shape, facial/pubicsecondary sexual characteristics (e.g. male body shape, facial/pubic
hair, deeper pitch of voice)hair, deeper pitch of voice)
 Adulthood: Baldness, BHP, Prostatic cancerAdulthood: Baldness, BHP, Prostatic cancer
Testes:Testes: Promotion of spermatogenesis and maturation of spermPromotion of spermatogenesis and maturation of sperm
 Moderately high dose causes testicular atrophy by inhibiting GnModerately high dose causes testicular atrophy by inhibiting Gn
secretionsecretion
Testosterone – anabolic effectsTestosterone – anabolic effects
 Pubertal spurt of growth at puberty – both boy and girlPubertal spurt of growth at puberty – both boy and girl
 Bone growth – thickness and lengthBone growth – thickness and length
 Oestrogen from testosterone – fuse of bones andOestrogen from testosterone – fuse of bones and
mineralizationmineralization
 Muscle building – if aided by exerciseMuscle building – if aided by exercise
 Positive nitrogen, minerals and water balance – increasePositive nitrogen, minerals and water balance – increase
in weightin weight
 Increase in appetiteIncrease in appetite
 Acceleration of erythropoiesisAcceleration of erythropoiesis
Androgens – Targets of ActionAndrogens – Targets of Action
Mechanism of ActionMechanism of Action
Androgen receptor:Androgen receptor:
 Both, testosterone and DH testosterone – act via AndrogenBoth, testosterone and DH testosterone – act via Androgen
receptors (AR) – nuclear receptor super familyreceptors (AR) – nuclear receptor super family
 55 αα-reductase 1 and 2-reductase 1 and 2
 Ligand binding and DNA binding domainsLigand binding and DNA binding domains
 Mutations in AR: Incomplete sexual developmentMutations in AR: Incomplete sexual development

Kennedy`s disease: in spinal andKennedy`s disease: in spinal and
bulbar muscle atrophybulbar muscle atrophy
Estrogen Receptor:
• Teststerone converts to
estrogen by CYP19
• Deficiency of CYP19 and
estrogen receptor – failure to
fuse long bones,
osteoporosis etc.
T DHT DHT- R
T- R
R
R
T- R
Nucleus
90%
10%
5- α
reductase
cytoplasm
Androgen - PharmacokineticsAndrogen - Pharmacokinetics
 Absorption:Absorption: undergoes high firstundergoes high first
pass metabolism. Therefore IMpass metabolism. Therefore IM
injections or synthetic preparationsinjections or synthetic preparations
are usedare used
 Transport:Transport: highly protein boundhighly protein bound
(98%, SHBG, albumin)(98%, SHBG, albumin)
 Metabolism:Metabolism:

by liver enzymes : androsteroneby liver enzymes : androsterone
& etiocholanolone& etiocholanolone

excretion by urine afterexcretion by urine after
conjugationconjugation

small quantity of oestrogen alsosmall quantity of oestrogen also
produced from testosteroneproduced from testosterone
Methyltestosterone, FluoxymesteroneMethyltestosterone, Fluoxymesterone
metabolized slowlymetabolized slowly
Therapeutic Androgen PreparationsTherapeutic Androgen Preparations
 Testosterone is ineffective orally (inactivated by liver), and is usuallyTestosterone is ineffective orally (inactivated by liver), and is usually
given as i.m. injections of testosterone estersgiven as i.m. injections of testosterone esters

Esterification of fatty acid at 17-hydroxyl groupEsterification of fatty acid at 17-hydroxyl group

Examples- propionate (25-50 mg), enanthate (100 mg depotExamples- propionate (25-50 mg), enanthate (100 mg depot
preparations)preparations)

Undecanoate in oil - orallyUndecanoate in oil - orally

effects last for 2-3 weekseffects last for 2-3 weeks
 Transdermal preparations: Implants, capsules and patches mayTransdermal preparations: Implants, capsules and patches may
improve complianceimprove compliance

more stable levels and symptoms, effects last for monthsmore stable levels and symptoms, effects last for months
Therapeutic Uses of AndrogensTherapeutic Uses of Androgens
 Androgen replacement therapy (ART)Androgen replacement therapy (ART)
 ART uses derivatives of testosterone, rather than syntheticART uses derivatives of testosterone, rather than synthetic
Androgens, because they are safe, effective and easy to monitorAndrogens, because they are safe, effective and easy to monitor
1.1. Androgen deficiency:Androgen deficiency: clinical diagnosis confirmed by hormone assaysclinical diagnosis confirmed by hormone assays

is usually caused byis usually caused by
• underlying testicular disorders (high LH, but low testosterone levels)underlying testicular disorders (high LH, but low testosterone levels)
• hypothalamic-pituitary disorders (low LH and low testosteronehypothalamic-pituitary disorders (low LH and low testosterone
levels)levels)
 Goal: Mimic the normal testosterone concentration as closely as possibleGoal: Mimic the normal testosterone concentration as closely as possible
(serum concentration monitoring)(serum concentration monitoring)
 If untreated, does not shorten life expectancy, but is associated withIf untreated, does not shorten life expectancy, but is associated with
significant morbidity (ambiguous genitalia, delayed puberty & infertility)significant morbidity (ambiguous genitalia, delayed puberty & infertility)
 Treated by androgen replacement therapy (ART), usually for the remainderTreated by androgen replacement therapy (ART), usually for the remainder
of life. The aim is to restore tissue androgen exposure by using the naturalof life. The aim is to restore tissue androgen exposure by using the natural
androgen testosteroneandrogen testosterone
Uses – contd.Uses – contd.
2.2. HypopituitarismHypopituitarism

Monitoring at anticipated time of pubertyMonitoring at anticipated time of puberty
2.2. AIDS related muscle wastingAIDS related muscle wasting
3.3. Hereditary angioneurotic edema (methyltestosterone)Hereditary angioneurotic edema (methyltestosterone)
4.4. AgeingAgeing
Misuse:Misuse: involves prescription with no acceptable medicalinvolves prescription with no acceptable medical
indicationindication
 Examples of misuse include:Examples of misuse include:

male infertilitymale infertility

male sexual dysfunction or impotencemale sexual dysfunction or impotence

““male menopause” (andropause)male menopause” (andropause)
 no convincing evidence that androgen therapy is eitherno convincing evidence that androgen therapy is either
effective treatment or safe for older men unless thereeffective treatment or safe for older men unless there
is frank androgen deficiencyis frank androgen deficiency
Androgens – Adverse EffectsAndrogens – Adverse Effects
 Virilization:Virilization:

may occur in women receiving relatively high dosesmay occur in women receiving relatively high doses
for prolonged periods, such as for estrogen-for prolonged periods, such as for estrogen-
dependent mammary carcinomadependent mammary carcinoma
 Cholestatic JaundiceCholestatic Jaundice

may be produced by steroids possessing a 17-alphamay be produced by steroids possessing a 17-alpha
methyl group – oral Vs parenteralmethyl group – oral Vs parenteral
 Priapism (sustained erection)Priapism (sustained erection)
 OligospermiaOligospermia
 Edema--via promotion of salt and water retention.Edema--via promotion of salt and water retention.
 Precocious puberty and short staturePrecocious puberty and short stature
 AcneAcne
 Hepatic carcinoma - oralHepatic carcinoma - oral
 Gynaecomastia – children and liver diseaseGynaecomastia – children and liver disease
Androgens - contraindicationsAndrogens - contraindications
 Carcinoma of Prostate and male BreastCarcinoma of Prostate and male Breast
 Liver and Kidney diseasesLiver and Kidney diseases
 PregnancyPregnancy
 CHF, epilepsy and migraineCHF, epilepsy and migraine
Anabolic SteroidsAnabolic Steroids
 Synthetic analogues – higher anabolic butSynthetic analogues – higher anabolic but
lower androgenic activity (1: 3 ratio)lower androgenic activity (1: 3 ratio)
 Examples;Examples;

Nandrolone propionate 10-25 mg/ml (10 – 50Nandrolone propionate 10-25 mg/ml (10 – 50
mg IM/week) – inj. Durabolinmg IM/week) – inj. Durabolin

Nandrolone decanoate 25-100 mg/ml (25-Nandrolone decanoate 25-100 mg/ml (25-
100mg/week) – inj. Decadurabolin100mg/week) – inj. Decadurabolin

Stanazolol (2mg tablets (2-6 mg/day)Stanazolol (2mg tablets (2-6 mg/day)
Anabolic Steroids – TherapeuticAnabolic Steroids – Therapeutic
usesuses
1.1. Catabolic states: Acute illness, severeCatabolic states: Acute illness, severe
trauma, major surgerytrauma, major surgery
2.2. Renal insufficiency – frequency ofRenal insufficiency – frequency of
dialysisdialysis
3.3. Osteoporosis – elderly malesOsteoporosis – elderly males
4.4. Suboptimal growth in boysSuboptimal growth in boys
5.5. AnaemiaAnaemia
6.6. Perfomance enhancementPerfomance enhancement
Anti-androgensAnti-androgens
 DanazolDanazol
 Cyproterone acetateCyproterone acetate
 FlutamideFlutamide
 Finasteride attenuatedFinasteride attenuated
DanazolDanazol
 Ethisterone derivative effective orallyEthisterone derivative effective orally
 FSH & LH release in both sexes decrease –FSH & LH release in both sexes decrease –
inhibition of testicular/ovarian functioninhibition of testicular/ovarian function
 Binding of steroids to receptors decreaseBinding of steroids to receptors decrease
 Weak androgenic, anabolic, progestational & glucocorticoid actionWeak androgenic, anabolic, progestational & glucocorticoid action
Uses:Uses:

EndometriosisEndometriosis

MenorrhagiaMenorrhagia

Fibrocystic breast diseaseFibrocystic breast disease

Hereditary angioneurotic oedemaHereditary angioneurotic oedema

GynecomastiaGynecomastia

Infertility: attenuatedInfertility: attenuated
Preparations:Preparations:

50. 100 and 200 mg. tablets50. 100 and 200 mg. tablets

Dose is 200 – 600 mg/dayDose is 200 – 600 mg/day
Side effects: Dose related
• Amenorrhea (High doses)
• Androgenic effects - Decreased breast
size, hirsutism, weight gain etc.
• Hot flashes, night sweating, cramps
Cyproterone acetateCyproterone acetate
 Progesterone like activity – inhibits LH causingProgesterone like activity – inhibits LH causing
antiandrogenic actionantiandrogenic action
 Competes with dihydroteststerone for intracellularCompetes with dihydroteststerone for intracellular
receptorreceptor
Uses:Uses:
 AcneAcne
 Male pattern of baldnessMale pattern of baldness
 hirusitismhirusitism
 Ca. of prostateCa. of prostate
 Virilizing syndromeVirilizing syndrome
 Precocious pubertyPrecocious puberty
 Inappropriate behaviourInappropriate behaviour
FlutamideFlutamide
 Non-steroidal anti-inflammatory and noNon-steroidal anti-inflammatory and no
hormonal activity but specific antiandrogenichormonal activity but specific antiandrogenic
actionaction
 Antagonise androgens by competitive block – 2-Antagonise androgens by competitive block – 2-
hydroxyflutamidehydroxyflutamide

Accessory sex organsAccessory sex organs

PituitaryPituitary
Uses:Uses:
 Cancer of prostate along with GnRH agonistCancer of prostate along with GnRH agonist
 Female hirusitismFemale hirusitism
Dose: 250 mg tds.Dose: 250 mg tds.
FinasterideFinasteride
 MOA:MOA: Competitive inhibitor of 5Competitive inhibitor of 5 αα-reductase-reductase

Selective ofSelective of 55 αα-reductase type-2 isoenzyme-reductase type-2 isoenzyme

Mainly acts on urogenital tract (prostate) – DHT level loweredMainly acts on urogenital tract (prostate) – DHT level lowered
but not plasma Testosterone levelbut not plasma Testosterone level
 Uses:Uses:
1.1. Benign prostatic hypertrophy – decrease in prostate volume,Benign prostatic hypertrophy – decrease in prostate volume,
improved urinary flow, reversion of disease progressionimproved urinary flow, reversion of disease progression
– Withdrawal results in regrowth – prolonged therapyWithdrawal results in regrowth – prolonged therapy
1.1. Male pattern baldnessMale pattern baldness
– Kinetics:Kinetics: effective orally, metabolized in liver (t1/2 – 4-6effective orally, metabolized in liver (t1/2 – 4-6
hrs)hrs)
– Side effects:Side effects: loss of libido, impotence, decreasedloss of libido, impotence, decreased
ejaculationejaculation
– Doses:Doses: 5 mg OD (BHP) or 1 mg OD in baldness5 mg OD (BHP) or 1 mg OD in baldness
Erectile Dysfunction DrugsErectile Dysfunction Drugs
PDE-5 Inhibitors:PDE-5 Inhibitors: Sidenafil, tadalafilSidenafil, tadalafil

Nitric oxide (NO) pathwayNitric oxide (NO) pathway
SidenafilSidenafil
 Absorbed orally and half-life is 4 HrsAbsorbed orally and half-life is 4 Hrs
 Inhibits PDE5 in the corpus cavernosa of the penisInhibits PDE5 in the corpus cavernosa of the penis
 50mg 1 h before sexual activity50mg 1 h before sexual activity
 Potentiate nitrate’s hypotension activityPotentiate nitrate’s hypotension activity
 Ketoconazole, erythromycin, Verapamil increases itsKetoconazole, erythromycin, Verapamil increases its
level – due to CYP3A4 inhibitionlevel – due to CYP3A4 inhibition
 Renal & hepatic disease increases its levelRenal & hepatic disease increases its level
 Side effects:Side effects:
headache, flushing, dyspepsia, myalgia, loose motionheadache, flushing, dyspepsia, myalgia, loose motion
 Other Uses:Other Uses: Pulmonary hypertensionPulmonary hypertension
Oestrogens
OestrogensOestrogens
IntroductionIntroduction
 Oestrogens include the natural hormonesOestrogens include the natural hormones
as well as semi-synthetic and syntheticas well as semi-synthetic and synthetic
(stilbene) agents(stilbene) agents
 Oestrogens are used as hormone:Oestrogens are used as hormone:

replacement therapy (menopause)replacement therapy (menopause)

in oncologyin oncology

contraceptivescontraceptives
 Most estrogen in the female is produced inMost estrogen in the female is produced in
the ovaries by thethe ovaries by the theca internatheca interna and theand the
granulosagranulosa cells of the folliclescells of the follicles
CH3
OH
H
H
H
HO
ESTRADIOL
CH3
H
H
H
HO
O
ESTRONE
CH3
OH
H
H
H
HO
OH
ESTRIOL
Oxidized in liver
hydroxylation
Natural Oestrogens
1.
2.
3.
Synthetic oestrogensSynthetic oestrogens
 Steroidal:Steroidal:

Ethinyl estradiolEthinyl estradiol, Mestranol and Tibolone, Mestranol and Tibolone
 Nonsteroidal:Nonsteroidal:

Diethinylstilbestrol, Hexestrol and DienestrolDiethinylstilbestrol, Hexestrol and Dienestrol
Regulation of SecretionRegulation of Secretion
 Daily secretion: 10 toDaily secretion: 10 to
100 mcg per day100 mcg per day
 During pregnancy –During pregnancy –
large quantity bylarge quantity by
placenta – upto 30placenta – upto 30
mg per daymg per day
 Post menopausal: 2 –Post menopausal: 2 –
10 mcg per day only10 mcg per day only
Actions of OestrogensActions of Oestrogens
 On sexual organs (primary and secondary sexual characteristics)On sexual organs (primary and secondary sexual characteristics)
 Brings about pubertal changes in vagina, fallopian tube and uterus –Brings about pubertal changes in vagina, fallopian tube and uterus –
growthgrowth

Vagina: cornification of epithelial cells with thickening and stratificationVagina: cornification of epithelial cells with thickening and stratification
of epitheliumof epithelium

Ovaries : stimulate follicular growth; small doses cause an increase inOvaries : stimulate follicular growth; small doses cause an increase in
weight of ovary; large doses cause atrophyweight of ovary; large doses cause atrophy

Cervix: Rhythmic contractions of uterus and fallopian tube - increase ofCervix: Rhythmic contractions of uterus and fallopian tube - increase of
cervical mucous and alkaline watery secretion with a lowered viscositycervical mucous and alkaline watery secretion with a lowered viscosity
(favoring sperm access)(favoring sperm access)
 Secondary Sex CharactersSecondary Sex Characters
 Metabolic effects: AnabolicMetabolic effects: Anabolic
Oestrogens PhysiologyOestrogens Physiology
Other Pharmacological ActionsOther Pharmacological Actions
 Bone:Bone: Important for maintaining bone mass – increasedImportant for maintaining bone mass – increased
expression of bone mass proteins (osteocalcin, alkalineexpression of bone mass proteins (osteocalcin, alkaline
phosphatase)phosphatase)

Generation of vit.D3 – induction of renal hydroxylaseGeneration of vit.D3 – induction of renal hydroxylase
enzymeenzyme
 OedemaOedema – salt and water retention– salt and water retention
 Increased LDL and decreased HDL levelIncreased LDL and decreased HDL level
 Increased coagulability: II, VII, IX and XIncreased coagulability: II, VII, IX and X
 Lithogenicity of BileLithogenicity of Bile
 Increased SHBG, TBG and CBGIncreased SHBG, TBG and CBG
Mechanism of ActionMechanism of Action
 2 ERs are –2 ERs are – ERERαα and ERßand ERß
 ERERαα - uterus, vagina, breast and blood vessels- uterus, vagina, breast and blood vessels
 ERß – Prostate and OvariesERß – Prostate and Ovaries
 Work via a steroid hormone mechanism.Work via a steroid hormone mechanism.
 Entering the target cells and binding to specific cytosolicEntering the target cells and binding to specific cytosolic
receptorsreceptors
 The steroid-receptor complex is then translocated to theThe steroid-receptor complex is then translocated to the
nucleusnucleus
 Where it alters gene expressionWhere it alters gene expression
 Coactivator proteins and corepressor proteinsCoactivator proteins and corepressor proteins
Oestrogen - KineticsOestrogen - Kinetics
 Absorbed orally, but quick metabolism –Absorbed orally, but quick metabolism –
natural ones except ethinyl estradiolnatural ones except ethinyl estradiol
 All are absorbed transdermallyAll are absorbed transdermally
 Bound to plasma protein (SHBG)Bound to plasma protein (SHBG)
 Conjugated with glucoronic acid andConjugated with glucoronic acid and
excreted in urineexcreted in urine
 Enterohepatic circulation – deconjugationEnterohepatic circulation – deconjugation
in intestinein intestine
Oestrogen preparationsOestrogen preparations
 Preferred route is oral, but sometimes parenteralPreferred route is oral, but sometimes parenteral
when large doses are requiredwhen large doses are required
 All estrogen preparations are available – tabletAll estrogen preparations are available – tablet
and injectionsand injections
 Some examples:Some examples:

EE: 0.01, 0.05, 1 mg tab for menopauseEE: 0.01, 0.05, 1 mg tab for menopause

Conjugated estrogens: 0.625,1.25 mg tab for DUB orConjugated estrogens: 0.625,1.25 mg tab for DUB or
injections 25 mg/mlinjections 25 mg/ml

Mestranol: 0.1 mg tabs to convert to EEMestranol: 0.1 mg tabs to convert to EE

Estriol succinate: 1mg/gm creamEstriol succinate: 1mg/gm cream
Transdermal PatchesTransdermal Patches
 Sizes: 5, 10 and 20 sq. cm –Sizes: 5, 10 and 20 sq. cm –
0.025, 0.05 and 1 mg/day0.025, 0.05 and 1 mg/day
 Menopausal womenMenopausal women
 Usual dose: 0.5 mg/dayUsual dose: 0.5 mg/day
 Cyclic therapyCyclic therapy
 Estrogen + Progestin patchesEstrogen + Progestin patches
Therapeutic UsesTherapeutic Uses
 Hormone Replacement Therapy to Menopause womanHormone Replacement Therapy to Menopause woman
 Problems of menopause:Problems of menopause:

Vasomotor disturbancesVasomotor disturbances

Urogenital atrophyUrogenital atrophy

Osteoporosis and fracturesOsteoporosis and fractures

Dermatological changesDermatological changes

Risk of cardiovascular diseasesRisk of cardiovascular diseases
 Dosage: Oestrogen equivalent to 0.625 mg of EE/day inDosage: Oestrogen equivalent to 0.625 mg of EE/day in
cyclical mannercyclical manner

Progestin preparation (medroxy progesterone/norethisterone) isProgestin preparation (medroxy progesterone/norethisterone) is
used – 2.5 mg dailyused – 2.5 mg daily

TTS preparations may be preferredTTS preparations may be preferred
HRT IndicationsHRT Indications
 Benefits: (Indications)Benefits: (Indications)

Vasomotor and other symptoms of perimenopausal period –Vasomotor and other symptoms of perimenopausal period –
smallest effective dosesmallest effective dose

Post hysterectomy patients – estrogen onlyPost hysterectomy patients – estrogen only

Young woman with premature menopauseYoung woman with premature menopause

Prevention of osteoporosis and fracturesPrevention of osteoporosis and fractures
 Facts:Facts:

No protection against CVS diseasesNo protection against CVS diseases

No protection against cognitive decline – may increaseNo protection against cognitive decline – may increase

Increase in risk of breast cancer, gall stone, migraineIncrease in risk of breast cancer, gall stone, migraine
 Tibolone:Tibolone:

Developed specifically for HRTDeveloped specifically for HRT

Estrogenic and progestitional propertyEstrogenic and progestitional property

Dose is 2.5 mg dailyDose is 2.5 mg daily
Selective Estrogen Receptor
Modulators (SERMs)
Clomiphene Citrate (Antiestrogen)Clomiphene Citrate (Antiestrogen)
 The “Fertility pill” - pure antagonist ofThe “Fertility pill” - pure antagonist of
ESTROGEN receptor in all human tissuesESTROGEN receptor in all human tissues
 MOA: Gn secretion and FSHMOA: Gn secretion and FSH

Used in women withUsed in women with unexplained infertilityunexplained infertility oror
anovulatoryanovulatory infertilityinfertility

Bind to both, ERBind to both, ERαα and ERß receptorsand ERß receptors

Blocks estrogenic feedback inhibition of pituitary andBlocks estrogenic feedback inhibition of pituitary and
induces Gn secretioninduces Gn secretion

Increase in amount of secretion of FSH/LH at eachIncrease in amount of secretion of FSH/LH at each
secretary pulsesecretary pulse

Creates favorable atmosphere (ovarian stimulation)Creates favorable atmosphere (ovarian stimulation)
for ovulation in ovariesfor ovulation in ovaries
Clomiphene Citrate – contd.Clomiphene Citrate – contd.
 Dosage:Dosage:

50 mg OD from 550 mg OD from 5thth
day onwards for 5 daysday onwards for 5 days

Continued for 2-3 cyclesContinued for 2-3 cycles

Conception occurs within 4-6 cyclesConception occurs within 4-6 cycles

If no, dose increasedIf no, dose increased
 Other Uses:Other Uses:

Assisted reproduction (to develop multiple eggs)Assisted reproduction (to develop multiple eggs)

Artificial insemination (irregular ovulation)Artificial insemination (irregular ovulation)
(Clomiphene Challenge Test)(Clomiphene Challenge Test)

Oligospermia (25 mg daily for 6 months – 6 daysOligospermia (25 mg daily for 6 months – 6 days
rest))rest))
Tamoxifen (SERM)Tamoxifen (SERM)
 Actions:Actions:

Is a competitive antagonist to estrogen at receptors in theIs a competitive antagonist to estrogen at receptors in the
breast.breast.

Partial agonist at other estrogen receptors (thus minimizing sidePartial agonist at other estrogen receptors (thus minimizing side
effects due to estrogen deprivation) - bone, uterus, liver andeffects due to estrogen deprivation) - bone, uterus, liver and
pituitarypituitary

Hot flushes – antiestrogenic actionHot flushes – antiestrogenic action

Decrease in LDL level but no change in HDL levelDecrease in LDL level but no change in HDL level

Improvement in bone mass and lipid profileImprovement in bone mass and lipid profile
 Kinetics: Absorbed orally and has biphasic half life – 10Kinetics: Absorbed orally and has biphasic half life – 10
Hrs and 7 days – long duration of actionHrs and 7 days – long duration of action

Excreted in BileExcreted in Bile

Dose is 10 to 20 mg BDDose is 10 to 20 mg BD
Tamoxifen – contd.Tamoxifen – contd.
 Uses:Uses:

Breast carcinoma of pre and post menopauseBreast carcinoma of pre and post menopause

Adjuvant therapy in early casesAdjuvant therapy in early cases

Palliative therapyPalliative therapy
 Side effects.Side effects.

The drug has a low incidence of adverse reactionsThe drug has a low incidence of adverse reactions

Hot flashes, nausea, vomiting, rash, menstrual irregularities andHot flashes, nausea, vomiting, rash, menstrual irregularities and
bleeding, infrequent depression, headache, hypercalcemia,bleeding, infrequent depression, headache, hypercalcemia,
edema, and blood dyscrasiasedema, and blood dyscrasias

Less toxic than anticancer drugsLess toxic than anticancer drugs
 Other SERM –Other SERM – Raloxifene, ormeloxifene etc.Raloxifene, ormeloxifene etc.

Raloxifene is estrogen antagonist of breast and endometriumRaloxifene is estrogen antagonist of breast and endometrium
while partial agonist of bone and CVSwhile partial agonist of bone and CVS
CH2CH3
O(CH3)2N-CH2-CH2
TAMOXIFEN (NOLVADEX)
Aromatase InhibitorsAromatase Inhibitors
 Letrozole, Anastrozole and ExemestaneLetrozole, Anastrozole and Exemestane
 MOA: LetrozoleMOA: Letrozole

Non steroidal compound, reversible inhibition ofNon steroidal compound, reversible inhibition of
aromatization all over the bodyaromatization all over the body

Suppression of proliferation of estrogen dependantSuppression of proliferation of estrogen dependant
breast carcinoma cellsbreast carcinoma cells

Rapid oral absorption – 100% bioavailability, large Vd,Rapid oral absorption – 100% bioavailability, large Vd,
t1/2 – 40 Hrst1/2 – 40 Hrs
 Uses: Early breast carcinoma and AdvancedUses: Early breast carcinoma and Advanced
breast carcinomabreast carcinoma
Progestins
PreparationsPreparations
 Progesterone Derivatives:Progesterone Derivatives:

Progesterone, Hydroxyprogesterone Caproate,Progesterone, Hydroxyprogesterone Caproate,
Medroxyprogesterone acet, Megesterol acetateMedroxyprogesterone acet, Megesterol acetate
 19-Nortestosterone derivatives:19-Nortestosterone derivatives:

Norethindrone, Norethynodrel, Lynestrenol,Norethindrone, Norethynodrel, Lynestrenol,
AllylestrenolAllylestrenol
 33rdrd
Generation compounds (Gonanes):Generation compounds (Gonanes):

norgestimate, norgestrel, desogestrel andnorgestimate, norgestrel, desogestrel and
levonogestrellevonogestrel
 Micronized formulations – for oral useMicronized formulations – for oral use
Actions of ProgesteroneActions of Progesterone
Uterus:Uterus:
 Responsible for Luteal phase of endometriumResponsible for Luteal phase of endometrium
 High level (pregnancy and luteal phase)High level (pregnancy and luteal phase)
prevents secretion of gonadotrophinsprevents secretion of gonadotrophins
 Maintenance of pregnancy – nidation andMaintenance of pregnancy – nidation and
maintenance of pregnancymaintenance of pregnancy

Decrease uterine motilityDecrease uterine motility

Depression of T-cell function and CMIDepression of T-cell function and CMI
 MenstruationMenstruation
Actions – contd.Actions – contd.
 Cervix:Cervix: viscid and cellular secretion – no sperm penetrationviscid and cellular secretion – no sperm penetration
 Vagina:Vagina: Pregnancy like changes – leucocyte infiltration andPregnancy like changes – leucocyte infiltration and
cornified epitheliumcornified epithelium
 Breast:Breast: Proliferation of acini in mammary glandsProliferation of acini in mammary glands

Prepares breast for lactation together with estrogenPrepares breast for lactation together with estrogen
 Metabolism:Metabolism:

impairment of glucose toleranceimpairment of glucose tolerance

Counteraction of benefits of oestrogensCounteraction of benefits of oestrogens
 CNS:CNS: SedationSedation
 Respiration:Respiration: StimulationStimulation
 Body temperature:Body temperature: rise in temperaturerise in temperature
 Pituitary:Pituitary: Weak Gn inhibitor, suppresses ovulation if given duringWeak Gn inhibitor, suppresses ovulation if given during
follicular phasefollicular phase
Progesterone – contd.Progesterone – contd.
 MOA:MOA:

Receptors are confined to female genital tracts,Receptors are confined to female genital tracts,
breasts and CNSbreasts and CNS

PRs are present in nucleus of target cellsPRs are present in nucleus of target cells

PR exists in 2 forms – PR-A and PR-B isoformsPR exists in 2 forms – PR-A and PR-B isoforms
(differing activities)(differing activities)
 Kinetics:Kinetics:

Inactive orally, high first pass metabolismInactive orally, high first pass metabolism

Synthetics are active orally and metbolized slowlySynthetics are active orally and metbolized slowly

Half-life of 8-24 HRsHalf-life of 8-24 HRs
Uses of ProgestinsUses of Progestins
 ContraceptiveContraceptive
 Hormonl replcement therapyHormonl replcement therapy
 Dysfunctional Uterine Bleeding: anovulatoryDysfunctional Uterine Bleeding: anovulatory
cyclescycles
 Endometriosis: anovulatory hypoestrogenic stateEndometriosis: anovulatory hypoestrogenic state
is created by progesteroneis created by progesterone
 Premenstrual syndromePremenstrual syndrome
 Threatened and habitual abortionThreatened and habitual abortion
 Endometrial carcinomaEndometrial carcinoma
Adverse EffectsAdverse Effects
Breast engorgement, headache, rise in body temp.,Breast engorgement, headache, rise in body temp.,
oedema, acne & mood swingsoedema, acne & mood swings
 Masculinization of external genitalia in the foetusMasculinization of external genitalia in the foetus
 Increased incidences of congenital abnormalitiesIncreased incidences of congenital abnormalities
 Irregular bleeding or amenorrheaIrregular bleeding or amenorrhea
 Lower HDL (19-nortestosterone derivatives)Lower HDL (19-nortestosterone derivatives)
 HyperglycaemiaHyperglycaemia
Antiprogestin - MifepristoneAntiprogestin - Mifepristone
 19-norsteroid compound – antiprogestational,19-norsteroid compound – antiprogestational,
antiglucocorticoid and antiandrogenic actionantiglucocorticoid and antiandrogenic action
Actions:Actions:
 Follicular phase: attenuation of Gn discharge – slowFollicular phase: attenuation of Gn discharge – slow
follicular development, failure of ovulationfollicular development, failure of ovulation
 Luteal phase: prevents secretory changes brought aboutLuteal phase: prevents secretory changes brought about
by progesteroneby progesterone
 Late cycle: Blocking of Progesterone action, increasedLate cycle: Blocking of Progesterone action, increased
PG release – uterine contractionPG release – uterine contraction
 Sensitization of endometrium to PG – menstruationSensitization of endometrium to PG – menstruation
 On Implantation: Blocking of decidution and dislodging ofOn Implantation: Blocking of decidution and dislodging of
conceptusconceptus
 In Menopause – progestational activityIn Menopause – progestational activity
Mifepristone – contd.Mifepristone – contd.
Kinetics:Kinetics: Absorbed orally and bioavailability is onlyAbsorbed orally and bioavailability is only
25% and half-life is 20-36 hrs25% and half-life is 20-36 hrs

CYP3A4CYP3A4
Uses:Uses:
1.1. Termination of PregnancyTermination of Pregnancy
2.2. Cervical primingCervical priming
3.3. Postcoital contraceptivePostcoital contraceptive
4.4. Induction of labour: single dose 2 days afterInduction of labour: single dose 2 days after
midcyclemidcycle
5.5. Cushing SyndromeCushing Syndrome
– Preparations: Tablet – 200 mgPreparations: Tablet – 200 mg
Pharmacology of HormonalPharmacology of Hormonal
ContraceptionContraception
Methods of ContraceptionMethods of Contraception
 Direct inhibition of spermatogenesisDirect inhibition of spermatogenesis
 Indirect inhibition of spermatogenesisIndirect inhibition of spermatogenesis
 Immunological techniques (vaccine)Immunological techniques (vaccine)
 Inhibition of ovulation (Hormonal contraceptives)Inhibition of ovulation (Hormonal contraceptives)
 Prevention of fertilizationPrevention of fertilization
 Anti-zygotic drugsAnti-zygotic drugs
 Inhibition of implantationInhibition of implantation
 use of spermicidal in vaginause of spermicidal in vagina
 IUCDIUCD
Female ContraceptionFemale Contraception
OralOral
 Combined pillCombined pill
 Sequential pillSequential pill
 Phased regimenPhased regimen
 Mini pillMini pill
 Post-coital pillPost-coital pill
InjectableInjectable
 Long actingLong acting

progesteroneprogesterone
alonealone
 Long actingLong acting

progesterone +progesterone +
estrogenestrogen
 Implants:Implants:

NorplantNorplant
HistoryHistory
 The oral contraceptive pill (combined OC) was firstThe oral contraceptive pill (combined OC) was first
introduced in 1960introduced in 1960
 1970: Introduction low dose or second generation of1970: Introduction low dose or second generation of
OCSOCS
 1980: biphasic or triphasic regimens1980: biphasic or triphasic regimens
 1990: 3rd generation OCS1990: 3rd generation OCS
(O + P has less androgenic activity,(O + P has less androgenic activity,
e.g, norgestimate 0.25mg or desogestrel 0.15 mg)e.g, norgestimate 0.25mg or desogestrel 0.15 mg)
 Since then it has undergone many modifications and hasSince then it has undergone many modifications and has
been used by millions of women worldwide.been used by millions of women worldwide.
Combined PillCombined Pill
 Low-dose oral contraceptives: productsLow-dose oral contraceptives: products
containing less than 50ug ethinyl estradiolcontaining less than 50ug ethinyl estradiol
 First generation oral contraceptives:First generation oral contraceptives:
products containing 50ug or more of ethinyl estradiolproducts containing 50ug or more of ethinyl estradiol
 Second generation oral contraceptives:Second generation oral contraceptives:
products containing levonorgestrel, norgestimate andproducts containing levonorgestrel, norgestimate and
other members of northindrone family and 30 or 40ugother members of northindrone family and 30 or 40ug
ethinyl estradiolethinyl estradiol
 Third generation oral contraceptives:Third generation oral contraceptives:
products containing desogestrel or gestodene with 20 orproducts containing desogestrel or gestodene with 20 or
30ug ethinyl estradiol30ug ethinyl estradiol

Newer progestins (gestodene and desogestrel) have beenNewer progestins (gestodene and desogestrel) have been
shown to have little or no androgenic activityshown to have little or no androgenic activity
FormulationsFormulations
 Formulations may be :Formulations may be :
1.1. MonophasicMonophasic (each tablet contains a fixed(each tablet contains a fixed
amount of estrogen and progestin);amount of estrogen and progestin);
2.2. BiphasicBiphasic (each tablet contains a fixed amount(each tablet contains a fixed amount
of estrogen, while the amount of progestinof estrogen, while the amount of progestin
increases in the second half of the cycle); orincreases in the second half of the cycle); or
3.3. TriphasicTriphasic (the amount of estrogen may be fixed(the amount of estrogen may be fixed
or variable, while the amount of progestinor variable, while the amount of progestin
increases in 3 equal phases).increases in 3 equal phases).
FormulationsFormulations
 Biphasic and triphasicBiphasic and triphasic formulations were initiallyformulations were initially
developed with the intent of lowering the total steroiddeveloped with the intent of lowering the total steroid
content of combined OCs (estrogen – 30 to 40 mcg)content of combined OCs (estrogen – 30 to 40 mcg)
 Two types of estrogen are used in combined OCs:Two types of estrogen are used in combined OCs:
ethinyl estradiol and mestranolethinyl estradiol and mestranol
 Mestranol is aMestranol is a “prodrug”“prodrug” that is converted in vivo tothat is converted in vivo to
ethinyl estradiolethinyl estradiol
 Several different progestins, of varying degrees ofSeveral different progestins, of varying degrees of
progestational potency, are used in combined OCsprogestational potency, are used in combined OCs
Phased Regimens: ExamplesPhased Regimens: Examples
Biphasic:Biphasic:
10 (O+P) + 11 (O+PP) + 7 (DF)10 (O+P) + 11 (O+PP) + 7 (DF)
Triphasic:Triphasic:
I 6 (E.O 30 µg + Levonorg. 50 µg)I 6 (E.O 30 µg + Levonorg. 50 µg)
II 5 (E.O 40 µg + Levonorg. 75 µg)II 5 (E.O 40 µg + Levonorg. 75 µg)
III 10 (E.O 30 µg + Levonorg. 125 µg)III 10 (E.O 30 µg + Levonorg. 125 µg)
Combined preparations:Combined preparations:
21 days (O+P) + 7 days (DF)21 days (O+P) + 7 days (DF)
99 – 100% effective99 – 100% effective
MinipillMinipill
 Progesterone only pillProgesterone only pill
 To eliminate estrogen to avoid long termTo eliminate estrogen to avoid long term
risks of estrogenrisks of estrogen
 Low dose estrogen is taken daily withoutLow dose estrogen is taken daily without
gapgap
 Efficacy is 96-98%Efficacy is 96-98%
Postcoital (Emergency)Postcoital (Emergency)
 Levonorgestrel 0.5 mg + EE 0.1 mg –Levonorgestrel 0.5 mg + EE 0.1 mg –
ovralovral tablettablet
 Levonorgestrel (0.75 mg) alone – 12 HrLevonorgestrel (0.75 mg) alone – 12 Hr
apartapart
 Mifepristone – 400 mg (2 tablets)Mifepristone – 400 mg (2 tablets)
InjectableInjectable
 Long acting Progestin aloneLong acting Progestin alone
1.1. Depot medroxyprogesterone (DMPA) – 150Depot medroxyprogesterone (DMPA) – 150
mg (1 ml vial) – half life – 50 days)mg (1 ml vial) – half life – 50 days)
2.2. Norethidrone (Norethisterone) – 200 mg (1Norethidrone (Norethisterone) – 200 mg (1
ml vial) – repeat at 2 monthsml vial) – repeat at 2 months
 Long acting progestin + estrogen:Long acting progestin + estrogen:

Medroxyprogesterone + estradol cypionate –Medroxyprogesterone + estradol cypionate –
IM injection – monthlyIM injection – monthly
 Implants – norplants, progestesert etc.Implants – norplants, progestesert etc.
Missed Pill AdviseMissed Pill Advise
 If 1 or 2 of 30-35mcg ethinylestradiol pill or 1 of 20If 1 or 2 of 30-35mcg ethinylestradiol pill or 1 of 20
mcgmcg

Advise to take the most recent pill as soon as remembers,Advise to take the most recent pill as soon as remembers,
continue taking remaining pill at usual time, she does not requirecontinue taking remaining pill at usual time, she does not require
additional contraception or emergency contraceptionadditional contraception or emergency contraception
 If 3 or more of 30-35 or 2 or more 20 mcgIf 3 or more of 30-35 or 2 or more 20 mcg

Advise as above, but to use extra method of contraception untilAdvise as above, but to use extra method of contraception until
pills have been taken for 7 days in a rowpills have been taken for 7 days in a row

If pill is missed in week 1 ( days1-7)and unprotected sexualIf pill is missed in week 1 ( days1-7)and unprotected sexual
intercourse has taken place in pill free week or wk 1 thenintercourse has taken place in pill free week or wk 1 then
emergency contraception is neededemergency contraception is needed

If pills missed in wk 3 ( days 15-21), advise to finish pill in packIf pills missed in wk 3 ( days 15-21), advise to finish pill in pack
and start new pack the next day, omitting pill free intervaland start new pack the next day, omitting pill free interval

If one has missed > 7 consecutive days then consider asIf one has missed > 7 consecutive days then consider as
stopped COCPstopped COCP
Mechanism of actionMechanism of action
 Combination pill, given daily for 3 of every 4Combination pill, given daily for 3 of every 4
weeks:weeks:

Prevents ovulation by inhibiting gonadotropinPrevents ovulation by inhibiting gonadotropin
secretion via effect on both pituitary andsecretion via effect on both pituitary and
hypothalamic centershypothalamic centers

Progestational agent in pill ; suppresses LHProgestational agent in pill ; suppresses LH
secretion(thus prevents ovulation)secretion(thus prevents ovulation)

Estrogenic agent ; suppresses FSH secretion (thusEstrogenic agent ; suppresses FSH secretion (thus
prevents selection and emergence of dominantprevents selection and emergence of dominant
follicle)follicle)

Progestin only preparations – suppresses LH surgeProgestin only preparations – suppresses LH surge
and also by direct actionand also by direct action
Mechanism of action – contd.Mechanism of action – contd.
 Thick Cervical mucus secretion makingThick Cervical mucus secretion making
hostile for sperm penetrationhostile for sperm penetration
 Failure of implantation – hyperproliferativeFailure of implantation – hyperproliferative
and hypersecretory endometriumand hypersecretory endometrium
 Uterine and tubal contraction – peristalsisUterine and tubal contraction – peristalsis
within the fallopian tubewithin the fallopian tube
 Dislodging of implanted blastocyteDislodging of implanted blastocyte
Adverse EffectsAdverse Effects
 Some combined OC users will experience minor side-Some combined OC users will experience minor side-
effects, most commonly during the first 3 cycles.effects, most commonly during the first 3 cycles.
 These side-effects may lead to discontinuation of theThese side-effects may lead to discontinuation of the
combined OCcombined OC
 The most common reason patients discontinueThe most common reason patients discontinue
combined OC use is:combined OC use is:
1.1. Abnormal menstrual bleeding, followed by :Abnormal menstrual bleeding, followed by :
2.2. Nausea,Nausea,
3.3. Weight gain,Weight gain,
4.4. Mood changes,Mood changes,
5.5. Breast tendernessBreast tenderness
6.6. Headache.Headache.
Adverse Effects - LateAdverse Effects - Late
 ChloasmaChloasma
 Pruritus vulvaePruritus vulvae
 Carbohydrate intoleranceCarbohydrate intolerance
 Mood swingsMood swings
Serious ComplicationsSerious Complications
 Leg vein and pulmonary thrombosisLeg vein and pulmonary thrombosis
 Coronary and cerebral thrombosisCoronary and cerebral thrombosis
 HypertensionHypertension
 Genital carcinomaGenital carcinoma
 Benign hepatomasBenign hepatomas
 GallstonesGallstones
Contraindications (WHO)Contraindications (WHO)
1.1. < 6 weeks postpartum if breastfeeding< 6 weeks postpartum if breastfeeding
2.2. Smoker over the age of 35 (≥ 15 cigarettes per day)Smoker over the age of 35 (≥ 15 cigarettes per day)
3.3. Hypertension (systolic ≥ 160mm Hg or diastolic ≥ 100mm Hg)Hypertension (systolic ≥ 160mm Hg or diastolic ≥ 100mm Hg)
4.4. Current or past history of venous thromboembolism (VTE)Current or past history of venous thromboembolism (VTE)
5.5. Ischemic heart diseaseIschemic heart disease
6.6. History of cerebrovascular accidentHistory of cerebrovascular accident
7.7. Complicated valvular heart diseaseComplicated valvular heart disease
8.8. Migraine headacheMigraine headache
9.9. Breast cancer (current)Breast cancer (current)
10.10. Diabetes with retinopathy/nephropathy/neuropathyDiabetes with retinopathy/nephropathy/neuropathy
11.11. CirrhosisCirrhosis
12.12. Liver tumour (adenoma or hepatoma)Liver tumour (adenoma or hepatoma)
Relative ContraindicationsRelative Contraindications
1.1. Smoker over the age of 35 (< 15 cigarettes per day)Smoker over the age of 35 (< 15 cigarettes per day)
2.2. Adequately controlled hypertensionAdequately controlled hypertension
3.3. Hypertension (systolic 140–159mm Hg,Hypertension (systolic 140–159mm Hg,
diastolic 90–99mm Hg)diastolic 90–99mm Hg)
4.4. Migraine headache over the age of 35Migraine headache over the age of 35
5.5. Currently symptomatic gallbladder diseaseCurrently symptomatic gallbladder disease
6.6. History of combined OC-related cholestasisHistory of combined OC-related cholestasis
7.7. Mentally illMentally ill
8.8. Undiagnosed vaginal BleedingUndiagnosed vaginal Bleeding
Centchroman and male contraceptiveCentchroman and male contraceptive
Remember !Remember !
 Pharmacological actions of testosterone, mechanism ofPharmacological actions of testosterone, mechanism of
action, adverse effects and therapeutic usesaction, adverse effects and therapeutic uses
 Danazol, Flutamide and Finasteride detailsDanazol, Flutamide and Finasteride details
 Anabolic SteroidsAnabolic Steroids
 Actions of Oestrogens and usesActions of Oestrogens and uses
 Clomiphene citrate in detailClomiphene citrate in detail
 Antiprogestin – MifepristoneAntiprogestin – Mifepristone
 Different contraceptive measureDifferent contraceptive measure
 Different Hormonal contraceptivesDifferent Hormonal contraceptives
 Mechanism of action, adverse effects andMechanism of action, adverse effects and
contraindications of OCPscontraindications of OCPs
THANK YOUTHANK YOU

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Androgens, Oestrogens, Progestins and Contraceptives - drdhriti

  • 1. Androgens, Oestrogens, ProgestinsAndrogens, Oestrogens, Progestins and Hormonal Contraceptivesand Hormonal Contraceptives Dr. D. K. BrahmaDr. D. K. Brahma Associate ProfessorAssociate Professor Department of PharmacologyDepartment of Pharmacology NEIGRIHMS, ShillongNEIGRIHMS, Shillong
  • 2. IntroductionIntroduction  Substances which cause secondary sex characteristicsSubstances which cause secondary sex characteristics in Malein Male  Natural Androgens:Natural Androgens:  From Testes:From Testes: • Testosterone (5-12 mg daily)Testosterone (5-12 mg daily) • Dihydrotestosterone (more active) by 5Dihydrotestosterone (more active) by 5 αα-reductase-reductase  From Adrenal cortex: (weak androgens)From Adrenal cortex: (weak androgens) • DehydroepiandrosteroneDehydroepiandrosterone • AndrostenedioneAndrostenedione {Females – 0.25 – 0.5 mg/day (ovary + adrenals)}{Females – 0.25 – 0.5 mg/day (ovary + adrenals)}  Androsterone – metabolite of testosteroneAndrosterone – metabolite of testosterone  Synthetic androgens:Synthetic androgens:  Methyltestosterone, FluoxymesteroneMethyltestosterone, Fluoxymesterone  Propionate and enanthatePropionate and enanthate
  • 3. TestosteroneTestosterone  Produced from cholesterol primarily by Leydig cells in testesProduced from cholesterol primarily by Leydig cells in testes  Secreted at adult levels during 1st trimesterSecreted at adult levels during 1st trimester11, during neonatal life, during neonatal life22,, continually after pubertycontinually after puberty33  Bound in plasma to albumin & sex hormone binding globulinBound in plasma to albumin & sex hormone binding globulin (SHBG)(SHBG)  Can be converted to the more potent, 5α-dihydrotestosteroneCan be converted to the more potent, 5α-dihydrotestosterone (DHT), which is responsible for many of the responses to(DHT), which is responsible for many of the responses to testosterone in the urogenital tract (e.g. prostate gland hyperplasia)testosterone in the urogenital tract (e.g. prostate gland hyperplasia)  Binds to and activates a single androgen receptor (AR)Binds to and activates a single androgen receptor (AR)  Androgen receptors are present in many tissues includingAndrogen receptors are present in many tissues including reproductive tissue, skeletal muscle, brain, kidney etc.reproductive tissue, skeletal muscle, brain, kidney etc. 1 2 3
  • 4. Testosterone 17-alkyl substitution Methyltestosterone Fluoxymesterone • All androgens contain a Testosterone structures • Testosterone has 19-carbons and in general its a steroidal structure
  • 5. Cholesterol Pregnenolone Progesterone Corticosterone 11-Desoxy- corticosterone 18-Hydroxy- corticosterone ALDOSTERONE 17-α- Hydroxy pregnenolone 11- Desoxy- cortisol 17- Hydroxy progesterone 21,β hydroxylase CORTISOL 11,β hydroxylase Dehydro-epi androsterone Andro- stenedione Oestrone Oestriol TESTOSTERONE OESTRADIOL ACTH
  • 6. Regulation of SecretionRegulation of Secretion • LH – Testosterone secretion • FSH – Spermatogenesis • High testosterone – inhibits LH • Estrogen – feedback inhibition • Inhibin – FSH inhibition • Plasma level of Testosterone: 0.3 to 1 mcg/dl (male) 20 to 60 ng/dl (female)
  • 7. Biological Effects - TestosteroneBiological Effects - Testosterone Androgenic Effects:Androgenic Effects:  In the foetus, testosterone promotes development of maleIn the foetus, testosterone promotes development of male reproductive tract – internal genitalia, vas deferens, epididymis andreproductive tract – internal genitalia, vas deferens, epididymis and external genitalia (sex differentiation)external genitalia (sex differentiation)  During puberty, testosterone promotes development of :During puberty, testosterone promotes development of :  primary sexual characteristics (e.g. enlargement of penis, scrotum andprimary sexual characteristics (e.g. enlargement of penis, scrotum and testes)testes)  secondary sexual characteristics (e.g. male body shape, facial/pubicsecondary sexual characteristics (e.g. male body shape, facial/pubic hair, deeper pitch of voice)hair, deeper pitch of voice)  Adulthood: Baldness, BHP, Prostatic cancerAdulthood: Baldness, BHP, Prostatic cancer Testes:Testes: Promotion of spermatogenesis and maturation of spermPromotion of spermatogenesis and maturation of sperm  Moderately high dose causes testicular atrophy by inhibiting GnModerately high dose causes testicular atrophy by inhibiting Gn secretionsecretion
  • 8. Testosterone – anabolic effectsTestosterone – anabolic effects  Pubertal spurt of growth at puberty – both boy and girlPubertal spurt of growth at puberty – both boy and girl  Bone growth – thickness and lengthBone growth – thickness and length  Oestrogen from testosterone – fuse of bones andOestrogen from testosterone – fuse of bones and mineralizationmineralization  Muscle building – if aided by exerciseMuscle building – if aided by exercise  Positive nitrogen, minerals and water balance – increasePositive nitrogen, minerals and water balance – increase in weightin weight  Increase in appetiteIncrease in appetite  Acceleration of erythropoiesisAcceleration of erythropoiesis
  • 9. Androgens – Targets of ActionAndrogens – Targets of Action
  • 10. Mechanism of ActionMechanism of Action Androgen receptor:Androgen receptor:  Both, testosterone and DH testosterone – act via AndrogenBoth, testosterone and DH testosterone – act via Androgen receptors (AR) – nuclear receptor super familyreceptors (AR) – nuclear receptor super family  55 αα-reductase 1 and 2-reductase 1 and 2  Ligand binding and DNA binding domainsLigand binding and DNA binding domains  Mutations in AR: Incomplete sexual developmentMutations in AR: Incomplete sexual development  Kennedy`s disease: in spinal andKennedy`s disease: in spinal and bulbar muscle atrophybulbar muscle atrophy Estrogen Receptor: • Teststerone converts to estrogen by CYP19 • Deficiency of CYP19 and estrogen receptor – failure to fuse long bones, osteoporosis etc.
  • 11. T DHT DHT- R T- R R R T- R Nucleus 90% 10% 5- α reductase cytoplasm
  • 12. Androgen - PharmacokineticsAndrogen - Pharmacokinetics  Absorption:Absorption: undergoes high firstundergoes high first pass metabolism. Therefore IMpass metabolism. Therefore IM injections or synthetic preparationsinjections or synthetic preparations are usedare used  Transport:Transport: highly protein boundhighly protein bound (98%, SHBG, albumin)(98%, SHBG, albumin)  Metabolism:Metabolism:  by liver enzymes : androsteroneby liver enzymes : androsterone & etiocholanolone& etiocholanolone  excretion by urine afterexcretion by urine after conjugationconjugation  small quantity of oestrogen alsosmall quantity of oestrogen also produced from testosteroneproduced from testosterone Methyltestosterone, FluoxymesteroneMethyltestosterone, Fluoxymesterone metabolized slowlymetabolized slowly
  • 13. Therapeutic Androgen PreparationsTherapeutic Androgen Preparations  Testosterone is ineffective orally (inactivated by liver), and is usuallyTestosterone is ineffective orally (inactivated by liver), and is usually given as i.m. injections of testosterone estersgiven as i.m. injections of testosterone esters  Esterification of fatty acid at 17-hydroxyl groupEsterification of fatty acid at 17-hydroxyl group  Examples- propionate (25-50 mg), enanthate (100 mg depotExamples- propionate (25-50 mg), enanthate (100 mg depot preparations)preparations)  Undecanoate in oil - orallyUndecanoate in oil - orally  effects last for 2-3 weekseffects last for 2-3 weeks  Transdermal preparations: Implants, capsules and patches mayTransdermal preparations: Implants, capsules and patches may improve complianceimprove compliance  more stable levels and symptoms, effects last for monthsmore stable levels and symptoms, effects last for months
  • 14. Therapeutic Uses of AndrogensTherapeutic Uses of Androgens  Androgen replacement therapy (ART)Androgen replacement therapy (ART)  ART uses derivatives of testosterone, rather than syntheticART uses derivatives of testosterone, rather than synthetic Androgens, because they are safe, effective and easy to monitorAndrogens, because they are safe, effective and easy to monitor 1.1. Androgen deficiency:Androgen deficiency: clinical diagnosis confirmed by hormone assaysclinical diagnosis confirmed by hormone assays  is usually caused byis usually caused by • underlying testicular disorders (high LH, but low testosterone levels)underlying testicular disorders (high LH, but low testosterone levels) • hypothalamic-pituitary disorders (low LH and low testosteronehypothalamic-pituitary disorders (low LH and low testosterone levels)levels)  Goal: Mimic the normal testosterone concentration as closely as possibleGoal: Mimic the normal testosterone concentration as closely as possible (serum concentration monitoring)(serum concentration monitoring)  If untreated, does not shorten life expectancy, but is associated withIf untreated, does not shorten life expectancy, but is associated with significant morbidity (ambiguous genitalia, delayed puberty & infertility)significant morbidity (ambiguous genitalia, delayed puberty & infertility)  Treated by androgen replacement therapy (ART), usually for the remainderTreated by androgen replacement therapy (ART), usually for the remainder of life. The aim is to restore tissue androgen exposure by using the naturalof life. The aim is to restore tissue androgen exposure by using the natural androgen testosteroneandrogen testosterone
  • 15. Uses – contd.Uses – contd. 2.2. HypopituitarismHypopituitarism  Monitoring at anticipated time of pubertyMonitoring at anticipated time of puberty 2.2. AIDS related muscle wastingAIDS related muscle wasting 3.3. Hereditary angioneurotic edema (methyltestosterone)Hereditary angioneurotic edema (methyltestosterone) 4.4. AgeingAgeing Misuse:Misuse: involves prescription with no acceptable medicalinvolves prescription with no acceptable medical indicationindication  Examples of misuse include:Examples of misuse include:  male infertilitymale infertility  male sexual dysfunction or impotencemale sexual dysfunction or impotence  ““male menopause” (andropause)male menopause” (andropause)  no convincing evidence that androgen therapy is eitherno convincing evidence that androgen therapy is either effective treatment or safe for older men unless thereeffective treatment or safe for older men unless there is frank androgen deficiencyis frank androgen deficiency
  • 16. Androgens – Adverse EffectsAndrogens – Adverse Effects  Virilization:Virilization:  may occur in women receiving relatively high dosesmay occur in women receiving relatively high doses for prolonged periods, such as for estrogen-for prolonged periods, such as for estrogen- dependent mammary carcinomadependent mammary carcinoma  Cholestatic JaundiceCholestatic Jaundice  may be produced by steroids possessing a 17-alphamay be produced by steroids possessing a 17-alpha methyl group – oral Vs parenteralmethyl group – oral Vs parenteral  Priapism (sustained erection)Priapism (sustained erection)  OligospermiaOligospermia  Edema--via promotion of salt and water retention.Edema--via promotion of salt and water retention.  Precocious puberty and short staturePrecocious puberty and short stature  AcneAcne  Hepatic carcinoma - oralHepatic carcinoma - oral  Gynaecomastia – children and liver diseaseGynaecomastia – children and liver disease
  • 17. Androgens - contraindicationsAndrogens - contraindications  Carcinoma of Prostate and male BreastCarcinoma of Prostate and male Breast  Liver and Kidney diseasesLiver and Kidney diseases  PregnancyPregnancy  CHF, epilepsy and migraineCHF, epilepsy and migraine
  • 18. Anabolic SteroidsAnabolic Steroids  Synthetic analogues – higher anabolic butSynthetic analogues – higher anabolic but lower androgenic activity (1: 3 ratio)lower androgenic activity (1: 3 ratio)  Examples;Examples;  Nandrolone propionate 10-25 mg/ml (10 – 50Nandrolone propionate 10-25 mg/ml (10 – 50 mg IM/week) – inj. Durabolinmg IM/week) – inj. Durabolin  Nandrolone decanoate 25-100 mg/ml (25-Nandrolone decanoate 25-100 mg/ml (25- 100mg/week) – inj. Decadurabolin100mg/week) – inj. Decadurabolin  Stanazolol (2mg tablets (2-6 mg/day)Stanazolol (2mg tablets (2-6 mg/day)
  • 19. Anabolic Steroids – TherapeuticAnabolic Steroids – Therapeutic usesuses 1.1. Catabolic states: Acute illness, severeCatabolic states: Acute illness, severe trauma, major surgerytrauma, major surgery 2.2. Renal insufficiency – frequency ofRenal insufficiency – frequency of dialysisdialysis 3.3. Osteoporosis – elderly malesOsteoporosis – elderly males 4.4. Suboptimal growth in boysSuboptimal growth in boys 5.5. AnaemiaAnaemia 6.6. Perfomance enhancementPerfomance enhancement
  • 20. Anti-androgensAnti-androgens  DanazolDanazol  Cyproterone acetateCyproterone acetate  FlutamideFlutamide  Finasteride attenuatedFinasteride attenuated
  • 21. DanazolDanazol  Ethisterone derivative effective orallyEthisterone derivative effective orally  FSH & LH release in both sexes decrease –FSH & LH release in both sexes decrease – inhibition of testicular/ovarian functioninhibition of testicular/ovarian function  Binding of steroids to receptors decreaseBinding of steroids to receptors decrease  Weak androgenic, anabolic, progestational & glucocorticoid actionWeak androgenic, anabolic, progestational & glucocorticoid action Uses:Uses:  EndometriosisEndometriosis  MenorrhagiaMenorrhagia  Fibrocystic breast diseaseFibrocystic breast disease  Hereditary angioneurotic oedemaHereditary angioneurotic oedema  GynecomastiaGynecomastia  Infertility: attenuatedInfertility: attenuated Preparations:Preparations:  50. 100 and 200 mg. tablets50. 100 and 200 mg. tablets  Dose is 200 – 600 mg/dayDose is 200 – 600 mg/day Side effects: Dose related • Amenorrhea (High doses) • Androgenic effects - Decreased breast size, hirsutism, weight gain etc. • Hot flashes, night sweating, cramps
  • 22. Cyproterone acetateCyproterone acetate  Progesterone like activity – inhibits LH causingProgesterone like activity – inhibits LH causing antiandrogenic actionantiandrogenic action  Competes with dihydroteststerone for intracellularCompetes with dihydroteststerone for intracellular receptorreceptor Uses:Uses:  AcneAcne  Male pattern of baldnessMale pattern of baldness  hirusitismhirusitism  Ca. of prostateCa. of prostate  Virilizing syndromeVirilizing syndrome  Precocious pubertyPrecocious puberty  Inappropriate behaviourInappropriate behaviour
  • 23. FlutamideFlutamide  Non-steroidal anti-inflammatory and noNon-steroidal anti-inflammatory and no hormonal activity but specific antiandrogenichormonal activity but specific antiandrogenic actionaction  Antagonise androgens by competitive block – 2-Antagonise androgens by competitive block – 2- hydroxyflutamidehydroxyflutamide  Accessory sex organsAccessory sex organs  PituitaryPituitary Uses:Uses:  Cancer of prostate along with GnRH agonistCancer of prostate along with GnRH agonist  Female hirusitismFemale hirusitism Dose: 250 mg tds.Dose: 250 mg tds.
  • 24. FinasterideFinasteride  MOA:MOA: Competitive inhibitor of 5Competitive inhibitor of 5 αα-reductase-reductase  Selective ofSelective of 55 αα-reductase type-2 isoenzyme-reductase type-2 isoenzyme  Mainly acts on urogenital tract (prostate) – DHT level loweredMainly acts on urogenital tract (prostate) – DHT level lowered but not plasma Testosterone levelbut not plasma Testosterone level  Uses:Uses: 1.1. Benign prostatic hypertrophy – decrease in prostate volume,Benign prostatic hypertrophy – decrease in prostate volume, improved urinary flow, reversion of disease progressionimproved urinary flow, reversion of disease progression – Withdrawal results in regrowth – prolonged therapyWithdrawal results in regrowth – prolonged therapy 1.1. Male pattern baldnessMale pattern baldness – Kinetics:Kinetics: effective orally, metabolized in liver (t1/2 – 4-6effective orally, metabolized in liver (t1/2 – 4-6 hrs)hrs) – Side effects:Side effects: loss of libido, impotence, decreasedloss of libido, impotence, decreased ejaculationejaculation – Doses:Doses: 5 mg OD (BHP) or 1 mg OD in baldness5 mg OD (BHP) or 1 mg OD in baldness
  • 25. Erectile Dysfunction DrugsErectile Dysfunction Drugs PDE-5 Inhibitors:PDE-5 Inhibitors: Sidenafil, tadalafilSidenafil, tadalafil  Nitric oxide (NO) pathwayNitric oxide (NO) pathway
  • 26. SidenafilSidenafil  Absorbed orally and half-life is 4 HrsAbsorbed orally and half-life is 4 Hrs  Inhibits PDE5 in the corpus cavernosa of the penisInhibits PDE5 in the corpus cavernosa of the penis  50mg 1 h before sexual activity50mg 1 h before sexual activity  Potentiate nitrate’s hypotension activityPotentiate nitrate’s hypotension activity  Ketoconazole, erythromycin, Verapamil increases itsKetoconazole, erythromycin, Verapamil increases its level – due to CYP3A4 inhibitionlevel – due to CYP3A4 inhibition  Renal & hepatic disease increases its levelRenal & hepatic disease increases its level  Side effects:Side effects: headache, flushing, dyspepsia, myalgia, loose motionheadache, flushing, dyspepsia, myalgia, loose motion  Other Uses:Other Uses: Pulmonary hypertensionPulmonary hypertension
  • 29. IntroductionIntroduction  Oestrogens include the natural hormonesOestrogens include the natural hormones as well as semi-synthetic and syntheticas well as semi-synthetic and synthetic (stilbene) agents(stilbene) agents  Oestrogens are used as hormone:Oestrogens are used as hormone:  replacement therapy (menopause)replacement therapy (menopause)  in oncologyin oncology  contraceptivescontraceptives  Most estrogen in the female is produced inMost estrogen in the female is produced in the ovaries by thethe ovaries by the theca internatheca interna and theand the granulosagranulosa cells of the folliclescells of the follicles
  • 31. Synthetic oestrogensSynthetic oestrogens  Steroidal:Steroidal:  Ethinyl estradiolEthinyl estradiol, Mestranol and Tibolone, Mestranol and Tibolone  Nonsteroidal:Nonsteroidal:  Diethinylstilbestrol, Hexestrol and DienestrolDiethinylstilbestrol, Hexestrol and Dienestrol
  • 32. Regulation of SecretionRegulation of Secretion  Daily secretion: 10 toDaily secretion: 10 to 100 mcg per day100 mcg per day  During pregnancy –During pregnancy – large quantity bylarge quantity by placenta – upto 30placenta – upto 30 mg per daymg per day  Post menopausal: 2 –Post menopausal: 2 – 10 mcg per day only10 mcg per day only
  • 33. Actions of OestrogensActions of Oestrogens  On sexual organs (primary and secondary sexual characteristics)On sexual organs (primary and secondary sexual characteristics)  Brings about pubertal changes in vagina, fallopian tube and uterus –Brings about pubertal changes in vagina, fallopian tube and uterus – growthgrowth  Vagina: cornification of epithelial cells with thickening and stratificationVagina: cornification of epithelial cells with thickening and stratification of epitheliumof epithelium  Ovaries : stimulate follicular growth; small doses cause an increase inOvaries : stimulate follicular growth; small doses cause an increase in weight of ovary; large doses cause atrophyweight of ovary; large doses cause atrophy  Cervix: Rhythmic contractions of uterus and fallopian tube - increase ofCervix: Rhythmic contractions of uterus and fallopian tube - increase of cervical mucous and alkaline watery secretion with a lowered viscositycervical mucous and alkaline watery secretion with a lowered viscosity (favoring sperm access)(favoring sperm access)  Secondary Sex CharactersSecondary Sex Characters  Metabolic effects: AnabolicMetabolic effects: Anabolic
  • 35. Other Pharmacological ActionsOther Pharmacological Actions  Bone:Bone: Important for maintaining bone mass – increasedImportant for maintaining bone mass – increased expression of bone mass proteins (osteocalcin, alkalineexpression of bone mass proteins (osteocalcin, alkaline phosphatase)phosphatase)  Generation of vit.D3 – induction of renal hydroxylaseGeneration of vit.D3 – induction of renal hydroxylase enzymeenzyme  OedemaOedema – salt and water retention– salt and water retention  Increased LDL and decreased HDL levelIncreased LDL and decreased HDL level  Increased coagulability: II, VII, IX and XIncreased coagulability: II, VII, IX and X  Lithogenicity of BileLithogenicity of Bile  Increased SHBG, TBG and CBGIncreased SHBG, TBG and CBG
  • 36. Mechanism of ActionMechanism of Action  2 ERs are –2 ERs are – ERERαα and ERßand ERß  ERERαα - uterus, vagina, breast and blood vessels- uterus, vagina, breast and blood vessels  ERß – Prostate and OvariesERß – Prostate and Ovaries  Work via a steroid hormone mechanism.Work via a steroid hormone mechanism.  Entering the target cells and binding to specific cytosolicEntering the target cells and binding to specific cytosolic receptorsreceptors  The steroid-receptor complex is then translocated to theThe steroid-receptor complex is then translocated to the nucleusnucleus  Where it alters gene expressionWhere it alters gene expression  Coactivator proteins and corepressor proteinsCoactivator proteins and corepressor proteins
  • 37. Oestrogen - KineticsOestrogen - Kinetics  Absorbed orally, but quick metabolism –Absorbed orally, but quick metabolism – natural ones except ethinyl estradiolnatural ones except ethinyl estradiol  All are absorbed transdermallyAll are absorbed transdermally  Bound to plasma protein (SHBG)Bound to plasma protein (SHBG)  Conjugated with glucoronic acid andConjugated with glucoronic acid and excreted in urineexcreted in urine  Enterohepatic circulation – deconjugationEnterohepatic circulation – deconjugation in intestinein intestine
  • 38. Oestrogen preparationsOestrogen preparations  Preferred route is oral, but sometimes parenteralPreferred route is oral, but sometimes parenteral when large doses are requiredwhen large doses are required  All estrogen preparations are available – tabletAll estrogen preparations are available – tablet and injectionsand injections  Some examples:Some examples:  EE: 0.01, 0.05, 1 mg tab for menopauseEE: 0.01, 0.05, 1 mg tab for menopause  Conjugated estrogens: 0.625,1.25 mg tab for DUB orConjugated estrogens: 0.625,1.25 mg tab for DUB or injections 25 mg/mlinjections 25 mg/ml  Mestranol: 0.1 mg tabs to convert to EEMestranol: 0.1 mg tabs to convert to EE  Estriol succinate: 1mg/gm creamEstriol succinate: 1mg/gm cream
  • 39. Transdermal PatchesTransdermal Patches  Sizes: 5, 10 and 20 sq. cm –Sizes: 5, 10 and 20 sq. cm – 0.025, 0.05 and 1 mg/day0.025, 0.05 and 1 mg/day  Menopausal womenMenopausal women  Usual dose: 0.5 mg/dayUsual dose: 0.5 mg/day  Cyclic therapyCyclic therapy  Estrogen + Progestin patchesEstrogen + Progestin patches
  • 40. Therapeutic UsesTherapeutic Uses  Hormone Replacement Therapy to Menopause womanHormone Replacement Therapy to Menopause woman  Problems of menopause:Problems of menopause:  Vasomotor disturbancesVasomotor disturbances  Urogenital atrophyUrogenital atrophy  Osteoporosis and fracturesOsteoporosis and fractures  Dermatological changesDermatological changes  Risk of cardiovascular diseasesRisk of cardiovascular diseases  Dosage: Oestrogen equivalent to 0.625 mg of EE/day inDosage: Oestrogen equivalent to 0.625 mg of EE/day in cyclical mannercyclical manner  Progestin preparation (medroxy progesterone/norethisterone) isProgestin preparation (medroxy progesterone/norethisterone) is used – 2.5 mg dailyused – 2.5 mg daily  TTS preparations may be preferredTTS preparations may be preferred
  • 41. HRT IndicationsHRT Indications  Benefits: (Indications)Benefits: (Indications)  Vasomotor and other symptoms of perimenopausal period –Vasomotor and other symptoms of perimenopausal period – smallest effective dosesmallest effective dose  Post hysterectomy patients – estrogen onlyPost hysterectomy patients – estrogen only  Young woman with premature menopauseYoung woman with premature menopause  Prevention of osteoporosis and fracturesPrevention of osteoporosis and fractures  Facts:Facts:  No protection against CVS diseasesNo protection against CVS diseases  No protection against cognitive decline – may increaseNo protection against cognitive decline – may increase  Increase in risk of breast cancer, gall stone, migraineIncrease in risk of breast cancer, gall stone, migraine  Tibolone:Tibolone:  Developed specifically for HRTDeveloped specifically for HRT  Estrogenic and progestitional propertyEstrogenic and progestitional property  Dose is 2.5 mg dailyDose is 2.5 mg daily
  • 43. Clomiphene Citrate (Antiestrogen)Clomiphene Citrate (Antiestrogen)  The “Fertility pill” - pure antagonist ofThe “Fertility pill” - pure antagonist of ESTROGEN receptor in all human tissuesESTROGEN receptor in all human tissues  MOA: Gn secretion and FSHMOA: Gn secretion and FSH  Used in women withUsed in women with unexplained infertilityunexplained infertility oror anovulatoryanovulatory infertilityinfertility  Bind to both, ERBind to both, ERαα and ERß receptorsand ERß receptors  Blocks estrogenic feedback inhibition of pituitary andBlocks estrogenic feedback inhibition of pituitary and induces Gn secretioninduces Gn secretion  Increase in amount of secretion of FSH/LH at eachIncrease in amount of secretion of FSH/LH at each secretary pulsesecretary pulse  Creates favorable atmosphere (ovarian stimulation)Creates favorable atmosphere (ovarian stimulation) for ovulation in ovariesfor ovulation in ovaries
  • 44. Clomiphene Citrate – contd.Clomiphene Citrate – contd.  Dosage:Dosage:  50 mg OD from 550 mg OD from 5thth day onwards for 5 daysday onwards for 5 days  Continued for 2-3 cyclesContinued for 2-3 cycles  Conception occurs within 4-6 cyclesConception occurs within 4-6 cycles  If no, dose increasedIf no, dose increased  Other Uses:Other Uses:  Assisted reproduction (to develop multiple eggs)Assisted reproduction (to develop multiple eggs)  Artificial insemination (irregular ovulation)Artificial insemination (irregular ovulation) (Clomiphene Challenge Test)(Clomiphene Challenge Test)  Oligospermia (25 mg daily for 6 months – 6 daysOligospermia (25 mg daily for 6 months – 6 days rest))rest))
  • 45. Tamoxifen (SERM)Tamoxifen (SERM)  Actions:Actions:  Is a competitive antagonist to estrogen at receptors in theIs a competitive antagonist to estrogen at receptors in the breast.breast.  Partial agonist at other estrogen receptors (thus minimizing sidePartial agonist at other estrogen receptors (thus minimizing side effects due to estrogen deprivation) - bone, uterus, liver andeffects due to estrogen deprivation) - bone, uterus, liver and pituitarypituitary  Hot flushes – antiestrogenic actionHot flushes – antiestrogenic action  Decrease in LDL level but no change in HDL levelDecrease in LDL level but no change in HDL level  Improvement in bone mass and lipid profileImprovement in bone mass and lipid profile  Kinetics: Absorbed orally and has biphasic half life – 10Kinetics: Absorbed orally and has biphasic half life – 10 Hrs and 7 days – long duration of actionHrs and 7 days – long duration of action  Excreted in BileExcreted in Bile  Dose is 10 to 20 mg BDDose is 10 to 20 mg BD
  • 46. Tamoxifen – contd.Tamoxifen – contd.  Uses:Uses:  Breast carcinoma of pre and post menopauseBreast carcinoma of pre and post menopause  Adjuvant therapy in early casesAdjuvant therapy in early cases  Palliative therapyPalliative therapy  Side effects.Side effects.  The drug has a low incidence of adverse reactionsThe drug has a low incidence of adverse reactions  Hot flashes, nausea, vomiting, rash, menstrual irregularities andHot flashes, nausea, vomiting, rash, menstrual irregularities and bleeding, infrequent depression, headache, hypercalcemia,bleeding, infrequent depression, headache, hypercalcemia, edema, and blood dyscrasiasedema, and blood dyscrasias  Less toxic than anticancer drugsLess toxic than anticancer drugs  Other SERM –Other SERM – Raloxifene, ormeloxifene etc.Raloxifene, ormeloxifene etc.  Raloxifene is estrogen antagonist of breast and endometriumRaloxifene is estrogen antagonist of breast and endometrium while partial agonist of bone and CVSwhile partial agonist of bone and CVS CH2CH3 O(CH3)2N-CH2-CH2 TAMOXIFEN (NOLVADEX)
  • 47. Aromatase InhibitorsAromatase Inhibitors  Letrozole, Anastrozole and ExemestaneLetrozole, Anastrozole and Exemestane  MOA: LetrozoleMOA: Letrozole  Non steroidal compound, reversible inhibition ofNon steroidal compound, reversible inhibition of aromatization all over the bodyaromatization all over the body  Suppression of proliferation of estrogen dependantSuppression of proliferation of estrogen dependant breast carcinoma cellsbreast carcinoma cells  Rapid oral absorption – 100% bioavailability, large Vd,Rapid oral absorption – 100% bioavailability, large Vd, t1/2 – 40 Hrst1/2 – 40 Hrs  Uses: Early breast carcinoma and AdvancedUses: Early breast carcinoma and Advanced breast carcinomabreast carcinoma
  • 49. PreparationsPreparations  Progesterone Derivatives:Progesterone Derivatives:  Progesterone, Hydroxyprogesterone Caproate,Progesterone, Hydroxyprogesterone Caproate, Medroxyprogesterone acet, Megesterol acetateMedroxyprogesterone acet, Megesterol acetate  19-Nortestosterone derivatives:19-Nortestosterone derivatives:  Norethindrone, Norethynodrel, Lynestrenol,Norethindrone, Norethynodrel, Lynestrenol, AllylestrenolAllylestrenol  33rdrd Generation compounds (Gonanes):Generation compounds (Gonanes):  norgestimate, norgestrel, desogestrel andnorgestimate, norgestrel, desogestrel and levonogestrellevonogestrel  Micronized formulations – for oral useMicronized formulations – for oral use
  • 50. Actions of ProgesteroneActions of Progesterone Uterus:Uterus:  Responsible for Luteal phase of endometriumResponsible for Luteal phase of endometrium  High level (pregnancy and luteal phase)High level (pregnancy and luteal phase) prevents secretion of gonadotrophinsprevents secretion of gonadotrophins  Maintenance of pregnancy – nidation andMaintenance of pregnancy – nidation and maintenance of pregnancymaintenance of pregnancy  Decrease uterine motilityDecrease uterine motility  Depression of T-cell function and CMIDepression of T-cell function and CMI  MenstruationMenstruation
  • 51. Actions – contd.Actions – contd.  Cervix:Cervix: viscid and cellular secretion – no sperm penetrationviscid and cellular secretion – no sperm penetration  Vagina:Vagina: Pregnancy like changes – leucocyte infiltration andPregnancy like changes – leucocyte infiltration and cornified epitheliumcornified epithelium  Breast:Breast: Proliferation of acini in mammary glandsProliferation of acini in mammary glands  Prepares breast for lactation together with estrogenPrepares breast for lactation together with estrogen  Metabolism:Metabolism:  impairment of glucose toleranceimpairment of glucose tolerance  Counteraction of benefits of oestrogensCounteraction of benefits of oestrogens  CNS:CNS: SedationSedation  Respiration:Respiration: StimulationStimulation  Body temperature:Body temperature: rise in temperaturerise in temperature  Pituitary:Pituitary: Weak Gn inhibitor, suppresses ovulation if given duringWeak Gn inhibitor, suppresses ovulation if given during follicular phasefollicular phase
  • 52. Progesterone – contd.Progesterone – contd.  MOA:MOA:  Receptors are confined to female genital tracts,Receptors are confined to female genital tracts, breasts and CNSbreasts and CNS  PRs are present in nucleus of target cellsPRs are present in nucleus of target cells  PR exists in 2 forms – PR-A and PR-B isoformsPR exists in 2 forms – PR-A and PR-B isoforms (differing activities)(differing activities)  Kinetics:Kinetics:  Inactive orally, high first pass metabolismInactive orally, high first pass metabolism  Synthetics are active orally and metbolized slowlySynthetics are active orally and metbolized slowly  Half-life of 8-24 HRsHalf-life of 8-24 HRs
  • 53. Uses of ProgestinsUses of Progestins  ContraceptiveContraceptive  Hormonl replcement therapyHormonl replcement therapy  Dysfunctional Uterine Bleeding: anovulatoryDysfunctional Uterine Bleeding: anovulatory cyclescycles  Endometriosis: anovulatory hypoestrogenic stateEndometriosis: anovulatory hypoestrogenic state is created by progesteroneis created by progesterone  Premenstrual syndromePremenstrual syndrome  Threatened and habitual abortionThreatened and habitual abortion  Endometrial carcinomaEndometrial carcinoma
  • 54. Adverse EffectsAdverse Effects Breast engorgement, headache, rise in body temp.,Breast engorgement, headache, rise in body temp., oedema, acne & mood swingsoedema, acne & mood swings  Masculinization of external genitalia in the foetusMasculinization of external genitalia in the foetus  Increased incidences of congenital abnormalitiesIncreased incidences of congenital abnormalities  Irregular bleeding or amenorrheaIrregular bleeding or amenorrhea  Lower HDL (19-nortestosterone derivatives)Lower HDL (19-nortestosterone derivatives)  HyperglycaemiaHyperglycaemia
  • 55. Antiprogestin - MifepristoneAntiprogestin - Mifepristone  19-norsteroid compound – antiprogestational,19-norsteroid compound – antiprogestational, antiglucocorticoid and antiandrogenic actionantiglucocorticoid and antiandrogenic action Actions:Actions:  Follicular phase: attenuation of Gn discharge – slowFollicular phase: attenuation of Gn discharge – slow follicular development, failure of ovulationfollicular development, failure of ovulation  Luteal phase: prevents secretory changes brought aboutLuteal phase: prevents secretory changes brought about by progesteroneby progesterone  Late cycle: Blocking of Progesterone action, increasedLate cycle: Blocking of Progesterone action, increased PG release – uterine contractionPG release – uterine contraction  Sensitization of endometrium to PG – menstruationSensitization of endometrium to PG – menstruation  On Implantation: Blocking of decidution and dislodging ofOn Implantation: Blocking of decidution and dislodging of conceptusconceptus  In Menopause – progestational activityIn Menopause – progestational activity
  • 56. Mifepristone – contd.Mifepristone – contd. Kinetics:Kinetics: Absorbed orally and bioavailability is onlyAbsorbed orally and bioavailability is only 25% and half-life is 20-36 hrs25% and half-life is 20-36 hrs  CYP3A4CYP3A4 Uses:Uses: 1.1. Termination of PregnancyTermination of Pregnancy 2.2. Cervical primingCervical priming 3.3. Postcoital contraceptivePostcoital contraceptive 4.4. Induction of labour: single dose 2 days afterInduction of labour: single dose 2 days after midcyclemidcycle 5.5. Cushing SyndromeCushing Syndrome – Preparations: Tablet – 200 mgPreparations: Tablet – 200 mg
  • 57. Pharmacology of HormonalPharmacology of Hormonal ContraceptionContraception
  • 58. Methods of ContraceptionMethods of Contraception  Direct inhibition of spermatogenesisDirect inhibition of spermatogenesis  Indirect inhibition of spermatogenesisIndirect inhibition of spermatogenesis  Immunological techniques (vaccine)Immunological techniques (vaccine)  Inhibition of ovulation (Hormonal contraceptives)Inhibition of ovulation (Hormonal contraceptives)  Prevention of fertilizationPrevention of fertilization  Anti-zygotic drugsAnti-zygotic drugs  Inhibition of implantationInhibition of implantation  use of spermicidal in vaginause of spermicidal in vagina  IUCDIUCD
  • 59. Female ContraceptionFemale Contraception OralOral  Combined pillCombined pill  Sequential pillSequential pill  Phased regimenPhased regimen  Mini pillMini pill  Post-coital pillPost-coital pill InjectableInjectable  Long actingLong acting  progesteroneprogesterone alonealone  Long actingLong acting  progesterone +progesterone + estrogenestrogen  Implants:Implants:  NorplantNorplant
  • 60. HistoryHistory  The oral contraceptive pill (combined OC) was firstThe oral contraceptive pill (combined OC) was first introduced in 1960introduced in 1960  1970: Introduction low dose or second generation of1970: Introduction low dose or second generation of OCSOCS  1980: biphasic or triphasic regimens1980: biphasic or triphasic regimens  1990: 3rd generation OCS1990: 3rd generation OCS (O + P has less androgenic activity,(O + P has less androgenic activity, e.g, norgestimate 0.25mg or desogestrel 0.15 mg)e.g, norgestimate 0.25mg or desogestrel 0.15 mg)  Since then it has undergone many modifications and hasSince then it has undergone many modifications and has been used by millions of women worldwide.been used by millions of women worldwide.
  • 61. Combined PillCombined Pill  Low-dose oral contraceptives: productsLow-dose oral contraceptives: products containing less than 50ug ethinyl estradiolcontaining less than 50ug ethinyl estradiol  First generation oral contraceptives:First generation oral contraceptives: products containing 50ug or more of ethinyl estradiolproducts containing 50ug or more of ethinyl estradiol  Second generation oral contraceptives:Second generation oral contraceptives: products containing levonorgestrel, norgestimate andproducts containing levonorgestrel, norgestimate and other members of northindrone family and 30 or 40ugother members of northindrone family and 30 or 40ug ethinyl estradiolethinyl estradiol  Third generation oral contraceptives:Third generation oral contraceptives: products containing desogestrel or gestodene with 20 orproducts containing desogestrel or gestodene with 20 or 30ug ethinyl estradiol30ug ethinyl estradiol  Newer progestins (gestodene and desogestrel) have beenNewer progestins (gestodene and desogestrel) have been shown to have little or no androgenic activityshown to have little or no androgenic activity
  • 62. FormulationsFormulations  Formulations may be :Formulations may be : 1.1. MonophasicMonophasic (each tablet contains a fixed(each tablet contains a fixed amount of estrogen and progestin);amount of estrogen and progestin); 2.2. BiphasicBiphasic (each tablet contains a fixed amount(each tablet contains a fixed amount of estrogen, while the amount of progestinof estrogen, while the amount of progestin increases in the second half of the cycle); orincreases in the second half of the cycle); or 3.3. TriphasicTriphasic (the amount of estrogen may be fixed(the amount of estrogen may be fixed or variable, while the amount of progestinor variable, while the amount of progestin increases in 3 equal phases).increases in 3 equal phases).
  • 63. FormulationsFormulations  Biphasic and triphasicBiphasic and triphasic formulations were initiallyformulations were initially developed with the intent of lowering the total steroiddeveloped with the intent of lowering the total steroid content of combined OCs (estrogen – 30 to 40 mcg)content of combined OCs (estrogen – 30 to 40 mcg)  Two types of estrogen are used in combined OCs:Two types of estrogen are used in combined OCs: ethinyl estradiol and mestranolethinyl estradiol and mestranol  Mestranol is aMestranol is a “prodrug”“prodrug” that is converted in vivo tothat is converted in vivo to ethinyl estradiolethinyl estradiol  Several different progestins, of varying degrees ofSeveral different progestins, of varying degrees of progestational potency, are used in combined OCsprogestational potency, are used in combined OCs
  • 64. Phased Regimens: ExamplesPhased Regimens: Examples Biphasic:Biphasic: 10 (O+P) + 11 (O+PP) + 7 (DF)10 (O+P) + 11 (O+PP) + 7 (DF) Triphasic:Triphasic: I 6 (E.O 30 µg + Levonorg. 50 µg)I 6 (E.O 30 µg + Levonorg. 50 µg) II 5 (E.O 40 µg + Levonorg. 75 µg)II 5 (E.O 40 µg + Levonorg. 75 µg) III 10 (E.O 30 µg + Levonorg. 125 µg)III 10 (E.O 30 µg + Levonorg. 125 µg) Combined preparations:Combined preparations: 21 days (O+P) + 7 days (DF)21 days (O+P) + 7 days (DF) 99 – 100% effective99 – 100% effective
  • 65. MinipillMinipill  Progesterone only pillProgesterone only pill  To eliminate estrogen to avoid long termTo eliminate estrogen to avoid long term risks of estrogenrisks of estrogen  Low dose estrogen is taken daily withoutLow dose estrogen is taken daily without gapgap  Efficacy is 96-98%Efficacy is 96-98%
  • 66. Postcoital (Emergency)Postcoital (Emergency)  Levonorgestrel 0.5 mg + EE 0.1 mg –Levonorgestrel 0.5 mg + EE 0.1 mg – ovralovral tablettablet  Levonorgestrel (0.75 mg) alone – 12 HrLevonorgestrel (0.75 mg) alone – 12 Hr apartapart  Mifepristone – 400 mg (2 tablets)Mifepristone – 400 mg (2 tablets)
  • 67. InjectableInjectable  Long acting Progestin aloneLong acting Progestin alone 1.1. Depot medroxyprogesterone (DMPA) – 150Depot medroxyprogesterone (DMPA) – 150 mg (1 ml vial) – half life – 50 days)mg (1 ml vial) – half life – 50 days) 2.2. Norethidrone (Norethisterone) – 200 mg (1Norethidrone (Norethisterone) – 200 mg (1 ml vial) – repeat at 2 monthsml vial) – repeat at 2 months  Long acting progestin + estrogen:Long acting progestin + estrogen:  Medroxyprogesterone + estradol cypionate –Medroxyprogesterone + estradol cypionate – IM injection – monthlyIM injection – monthly  Implants – norplants, progestesert etc.Implants – norplants, progestesert etc.
  • 68. Missed Pill AdviseMissed Pill Advise  If 1 or 2 of 30-35mcg ethinylestradiol pill or 1 of 20If 1 or 2 of 30-35mcg ethinylestradiol pill or 1 of 20 mcgmcg  Advise to take the most recent pill as soon as remembers,Advise to take the most recent pill as soon as remembers, continue taking remaining pill at usual time, she does not requirecontinue taking remaining pill at usual time, she does not require additional contraception or emergency contraceptionadditional contraception or emergency contraception  If 3 or more of 30-35 or 2 or more 20 mcgIf 3 or more of 30-35 or 2 or more 20 mcg  Advise as above, but to use extra method of contraception untilAdvise as above, but to use extra method of contraception until pills have been taken for 7 days in a rowpills have been taken for 7 days in a row  If pill is missed in week 1 ( days1-7)and unprotected sexualIf pill is missed in week 1 ( days1-7)and unprotected sexual intercourse has taken place in pill free week or wk 1 thenintercourse has taken place in pill free week or wk 1 then emergency contraception is neededemergency contraception is needed  If pills missed in wk 3 ( days 15-21), advise to finish pill in packIf pills missed in wk 3 ( days 15-21), advise to finish pill in pack and start new pack the next day, omitting pill free intervaland start new pack the next day, omitting pill free interval  If one has missed > 7 consecutive days then consider asIf one has missed > 7 consecutive days then consider as stopped COCPstopped COCP
  • 69. Mechanism of actionMechanism of action  Combination pill, given daily for 3 of every 4Combination pill, given daily for 3 of every 4 weeks:weeks:  Prevents ovulation by inhibiting gonadotropinPrevents ovulation by inhibiting gonadotropin secretion via effect on both pituitary andsecretion via effect on both pituitary and hypothalamic centershypothalamic centers  Progestational agent in pill ; suppresses LHProgestational agent in pill ; suppresses LH secretion(thus prevents ovulation)secretion(thus prevents ovulation)  Estrogenic agent ; suppresses FSH secretion (thusEstrogenic agent ; suppresses FSH secretion (thus prevents selection and emergence of dominantprevents selection and emergence of dominant follicle)follicle)  Progestin only preparations – suppresses LH surgeProgestin only preparations – suppresses LH surge and also by direct actionand also by direct action
  • 70. Mechanism of action – contd.Mechanism of action – contd.  Thick Cervical mucus secretion makingThick Cervical mucus secretion making hostile for sperm penetrationhostile for sperm penetration  Failure of implantation – hyperproliferativeFailure of implantation – hyperproliferative and hypersecretory endometriumand hypersecretory endometrium  Uterine and tubal contraction – peristalsisUterine and tubal contraction – peristalsis within the fallopian tubewithin the fallopian tube  Dislodging of implanted blastocyteDislodging of implanted blastocyte
  • 71. Adverse EffectsAdverse Effects  Some combined OC users will experience minor side-Some combined OC users will experience minor side- effects, most commonly during the first 3 cycles.effects, most commonly during the first 3 cycles.  These side-effects may lead to discontinuation of theThese side-effects may lead to discontinuation of the combined OCcombined OC  The most common reason patients discontinueThe most common reason patients discontinue combined OC use is:combined OC use is: 1.1. Abnormal menstrual bleeding, followed by :Abnormal menstrual bleeding, followed by : 2.2. Nausea,Nausea, 3.3. Weight gain,Weight gain, 4.4. Mood changes,Mood changes, 5.5. Breast tendernessBreast tenderness 6.6. Headache.Headache.
  • 72. Adverse Effects - LateAdverse Effects - Late  ChloasmaChloasma  Pruritus vulvaePruritus vulvae  Carbohydrate intoleranceCarbohydrate intolerance  Mood swingsMood swings
  • 73. Serious ComplicationsSerious Complications  Leg vein and pulmonary thrombosisLeg vein and pulmonary thrombosis  Coronary and cerebral thrombosisCoronary and cerebral thrombosis  HypertensionHypertension  Genital carcinomaGenital carcinoma  Benign hepatomasBenign hepatomas  GallstonesGallstones
  • 74. Contraindications (WHO)Contraindications (WHO) 1.1. < 6 weeks postpartum if breastfeeding< 6 weeks postpartum if breastfeeding 2.2. Smoker over the age of 35 (≥ 15 cigarettes per day)Smoker over the age of 35 (≥ 15 cigarettes per day) 3.3. Hypertension (systolic ≥ 160mm Hg or diastolic ≥ 100mm Hg)Hypertension (systolic ≥ 160mm Hg or diastolic ≥ 100mm Hg) 4.4. Current or past history of venous thromboembolism (VTE)Current or past history of venous thromboembolism (VTE) 5.5. Ischemic heart diseaseIschemic heart disease 6.6. History of cerebrovascular accidentHistory of cerebrovascular accident 7.7. Complicated valvular heart diseaseComplicated valvular heart disease 8.8. Migraine headacheMigraine headache 9.9. Breast cancer (current)Breast cancer (current) 10.10. Diabetes with retinopathy/nephropathy/neuropathyDiabetes with retinopathy/nephropathy/neuropathy 11.11. CirrhosisCirrhosis 12.12. Liver tumour (adenoma or hepatoma)Liver tumour (adenoma or hepatoma)
  • 75. Relative ContraindicationsRelative Contraindications 1.1. Smoker over the age of 35 (< 15 cigarettes per day)Smoker over the age of 35 (< 15 cigarettes per day) 2.2. Adequately controlled hypertensionAdequately controlled hypertension 3.3. Hypertension (systolic 140–159mm Hg,Hypertension (systolic 140–159mm Hg, diastolic 90–99mm Hg)diastolic 90–99mm Hg) 4.4. Migraine headache over the age of 35Migraine headache over the age of 35 5.5. Currently symptomatic gallbladder diseaseCurrently symptomatic gallbladder disease 6.6. History of combined OC-related cholestasisHistory of combined OC-related cholestasis 7.7. Mentally illMentally ill 8.8. Undiagnosed vaginal BleedingUndiagnosed vaginal Bleeding Centchroman and male contraceptiveCentchroman and male contraceptive
  • 76. Remember !Remember !  Pharmacological actions of testosterone, mechanism ofPharmacological actions of testosterone, mechanism of action, adverse effects and therapeutic usesaction, adverse effects and therapeutic uses  Danazol, Flutamide and Finasteride detailsDanazol, Flutamide and Finasteride details  Anabolic SteroidsAnabolic Steroids  Actions of Oestrogens and usesActions of Oestrogens and uses  Clomiphene citrate in detailClomiphene citrate in detail  Antiprogestin – MifepristoneAntiprogestin – Mifepristone  Different contraceptive measureDifferent contraceptive measure  Different Hormonal contraceptivesDifferent Hormonal contraceptives  Mechanism of action, adverse effects andMechanism of action, adverse effects and contraindications of OCPscontraindications of OCPs

Hinweis der Redaktion

  1. Fetus – HCG causes release testosterone
  2. Penile erection occurs when blood swells the corpus cavernosum, an effect facilitated by relaxation of regional smooth muscle. Smooth muscle tone is regulated by cellular Ca2+, which activates the Ca2+/calmodulin (CaM)-dependent enzyme myosin light chain kinase (MLCK), which leads to MLC phosphorylation and contraction. The nitric oxide (NO) pathway leads to relaxation of smooth muscle by stimulating the soluble guanylyl cyclase (sGC), which results in the production of cyclic GMP (cGMP) and the activation of cGMP-dependent protein kinase (PKG). PKG causes smooth-muscle relaxation by mechanisms that are still being defined and that might include a reduction in cytosolic Ca2+ (by enhanced Ca2+ export and/or by reduced inositol trisphosphate (InsP3) receptor-mediated Ca2+ mobilization) and dephosphorylation of myosin light chains (by activation of MLC phosphatase and/or by sequestration of MLCK in a phosphorylated form that is not readily activated by Ca2+/CaM). Viagra® specifically inhibits the breakdown of cellular cGMP by PDE5 (an isoform of phosphodiesterase that is localized to erectile tissue), and thereby prolongs and enhances the effects of NO/cGMP.
  3. - not a product of the ovary, estriol is the predominant urinary end product of estrogen metabolism. In the pregnant woman, estriol, as estradiol and estrone, are secreted by the placenta. Displays minimal estrogenic activity.
  4. Increased NO. PGI2 synthesis – hyperinsulinemia prevention by estrogen
  5. Perform a clomiphene challenge test, which is sometimes used to evaluate a woman&amp;apos;s ovulation and egg quality (ovarian reserve). When given early in a woman&amp;apos;s menstrual cycle for 5 days, clomiphene elevates a woman&amp;apos;s follicle-stimulating hormone (FSH) level. On the next day, an FSH blood level that has dropped back to normal is a sign of a normal ovarian reserve and ovulation. An elevated FSH is a sign of low ovarian reserve. Women with a diminished ovarian reserve can use donor eggs, which greatly improves their chances of giving birth to a healthy child.
  6. Progesterone acts as a Brain anaesthetic. Increase MAO concentration thus producing depression and irritability