This document discusses sterile products and parenteral admixtures. It begins by defining parenteral as referring to injectable routes of drug administration other than oral. The primary parenteral routes are described as subcutaneous, intramuscular, intravenous, and venoclysis. Containers, closures, and the intravenous admixture system are then outlined. The document summarizes the processing of parenterals including cleaning, preparation, filtration, filling, sealing, and sterilization. Methods for evaluating parenteral preparations such as sterility testing, clarity testing, leakage testing, pyrogen testing, and assay are also summarized.
2. Parenteral
Parenteral refers injectable route of
administration.
It derived from Greek words Para (Outside)
and enteron (Intestine).
So it is a route of administration other than
the oral route. This route of administration
bypasses the alimentary canal
3. PRIMARY PARENTERAL
ROUTES
Routes Usual volume
(mL)
Needle
commonly used
Formulation
constraints
Types of
medication
administered
SVP
Sub cutaneous 0.5-2 5/8 in. ,
23 gauge
Need to be isotonic Insulin, vaccines
Intra muscular 0.5-2 1.5 in. ,
23 gauge
Can be solutions,
emulsions, oils or
suspensions
Isotonic preferably
Nearly all drug
classes
Intra venous 1-100 Vein puncture
1.5 in. ,
20-22 gauge
Solutions, emulsions
and liposomes
Nearly all drug
classes
LVP 101 and larger
(infusion unit)
Venoclysis
1.5 in. ,
18-19 gauge
Solutions and some
emulsions
Nearly all drug
classes
4. S. No. ADVANTAGES DISVANTAGES
1. Quick onset Wrong dose or over dose can
be fatal
2. Vomiting and
unconscious patients can
take
Pain at site
3. Prolonged action by
modified formulation
( Depot)
Trained person required
4. Nutritive fluids (glucose,
electrolytes) can be given
Expensive
5. Drugs with poor
absorption or instability
from GIT
NECESSITY OF ASEPTIC
CONDITIONS IN
PRODUCTION,
COMPOUNDING AND
ADMINISTRATION
5. Containers:
1. Glass:
âą Highly Resistant Borosilicate Glass
âą Treated Soda lime Glass
âą Regular Soda Lime Glass
âą N.P (Non-parenteral) Glass
Type 4 is not used for parenteral packaging,
others all are used for parenteral packaging.
6. 2. Plastic:
Plastic containers are used but they face following problems
âą Permeation
âą Sorption
âą Leaching
âą Softening
3. Rubber:
To provide closure for multiple dose vials, IV fluid bottles, plugs for
disposable syringes and bulbs for ophthalmic pipettes, rubber is the
material of choice.
Problems associated with rubber closures are
âą Incompatibility
âą Chemical instability
âą Physical instability
7. Closure:
âą Characteristics of Good Pharmaceutical rubbers
âą Good ageing qualities
âą Satisfactory hardness and elasticity
âą Resistance to sterilization conditions
âą Impermeable to moisture and air
âą Examples:
âą Butyl Rubbers
âą Natural Rubbers
âą Neoprene Rubbers
âą Polyisoprene rubbers
âą Silicone Rubbers
8. Intravenous Admixture System
âą âAdmixture systemâ refers to sterile IV
solutions that are prepared by using one or
more medications or electrolytes and will be
administered via the parenteral route.
âą It requires the measured addition of a
medication to a 50 ml or larger bag or bottle
of IV fluid.
âą It can be provided to the patient in his/her
home.
âą Many hospitals involved in compounding IV
solutions and medications to outpatient
settings.
9. Methods for safe & effective
use of IV admixture
âą Proper training to nurses & pharmacist
âą Instruction regarding labeling Information
for stability & compatibility to the hospital
pharmacy dept.
âą Information for the formulation skills to the
pharmacist.
11. PROCESSING OF
PARENTERALS
S.No. STEPS
1. Cleaning of containers, closures and equipments
2. Collection of materials
3. Preparation of parenteral products
4. Filtration
5. Filling the preparation in final containers
6. Sealing the containers
7. Sterilization
8. Evaluation of parenteral preparation
9. Labeling and packaging
12. Formulation of parenteral
products
âą In the preparation of parenteral products, the following
substances are added to make a stable preparation:
ï The active drug
ï Vehicles
ï¶ Aqueous vehicle (e.g. water for injection, water for injection free
from CO2 )
ï¶ Non-aqueous vehicle (e.g. Ethyl alcohol, propylene glycol, almond oil)
ï Adjuvants
ï¶ Solubilizing agents (e.g. Tweens & polysorbates)
ï¶ Stabilizers & antioxidants (e.g. thiourea, ascorbic acid, tocopherol)
ï¶ Buffering agents (e.g. citric acid, sodium citrate)
ï¶ Antibacterial agents (e.g. benzyl alcohol, metacresol, phenol)
ï¶ Chelating agents (e.g. EDTA)
ï¶ Suspending, emulsifying & wetting agents (e.g. MC, CMC)
ï¶ Tonicity factor (e.g. sodium chloride, dextrose)
13. Production facilities of
parenterals
âą The production area where the parenteral
preparation are manufactured can be
divided into five sections:
ï¶Clean-up area
ï¶Preparation area
ï¶Aseptic area
ï¶Quarantine area
ï¶Finishing & packaging area
14. ï¶Clean-up area:
ï It is not aseptic area.
ï All the parenteral products must be free from foreign particles
& microorganism.
ï Clean-up area should be withstand moisture, dust &
detergent.
ï This area should be kept clean so that contaminants may not
be carried out into aseptic area.
ï¶Preparation area:
ï In this area the ingredients of the parenteral preparation are
mixed & preparation is made for filling operation.
ï It is not essentially aseptic area but strict precautions are
required to prevent any contamination from outside.
15. ï¶Aseptic area:
ï The parenteral preparations are filtered, filled into final container
& sealed should be in aseptic area.
ï The entry of personnel into aseptic area should be limited &
through an air lock.
ï Ceiling, wall & floor of that area should be sealed & painted.
ï The air in the aseptic area should be free from fibers, dust and
microorganism.
ï The High efficiency particulate air filters (HEPA) is used for air.
ï UV lamps are fitted in order to maintain sterility.
16. ï¶Quarantine area:
ï¶ After filling, sealing & sterilization the parenteral product
are held up in quarantine area.
ï¶ Randomly samples were kept foe evaluation.
ï¶ The batch or product pass the evaluation tests are transfer
in to finishing or packaging area.
ï¶ Finishing & packaging area:
ï¶ Parenteral products are properly labelled and packed.
ï¶ Properly packing is essential to provide protection against
physical damage.
ï¶ The labelled container should be packed in cardboard or
plastic container.
ï¶ Ampoules should be packed in partitioned boxes
17. EVALUATION OF
PARENTERAL PREPARATIONS
âą The finished parenteral products are
subjected to the following tests, in order to
maintain quality control:
âą A) sterility test
âą B)clarity test
âą C)leakage test
âą D)pyrogen test
âą E)assay
18. A) sterility test
âą It is a procedure carried out to detect and
conform absence of any viable form of
microbes in or on pharmacopeia preparation
or product.
1) Method of sterility testing
i ) METHOD 1 Membrane filtration method
ii) METHOD 2 Direct inoculation method
19. Membrane filtration method
(METHOD 1):
ï¶ Membrane filtration Appropriate for : (advantage)
âą Filterable aqueous preparations
âą Alcoholic preparations
âą Oily preparations
âą Preparations miscible with or soluble in aqueous or
oily (solvents with no antimicrobial effect)
ï¶ All steps of this procedure are performed aseptically
in a Class 100 Laminar Flow Hood
20. Membrane filter 0.45Ό porosity
Filter the test solution
After filtration remove the filter
Cut the filter in to two halves
First halves (For Bacteria) Second halves (For Fungi)
Transfer in 100 ml culture media
(Fluid Thioglycollate medium)
Incubate at 30-350 C for not less then 7
days
Transfer in 100 ml culture media
(Soyabeans-Casein Digest medium)
Incubate at 20-250 C for not less then 7
days
Observe the growth in the media Observe the growth in the media
21. Direct inoculation method
(METHOD 2):
ï¶ Suitable for samples with small volumes
ï¶ volume of the product is not more than 10%
of the volume of the medium
ï¶ suitable method for aqueous solutions, oily
liquids, ointments and creams
ï¶ Direct inoculation of the culture medium
suitable quantity of the preparation to be
examined is transferred directly into the
appropriate culture medium & incubate for
not less than 14 days.
22. Observation and results
Culture media is examined during and after at the end of incubation. The
following observations are possible:
1) No evidence of growth Pass the test for sterility.
2) There is evidence of growth Re-testing is performed same
no. of sample, volume & media as in original test No
evidence of growth Pass the test for sterility.
3) There is evidence of growth isolate & identify the organism.
Re-testing is performed with twice no. of sample if:
No evidence of growth Pass the test for sterility.
23. B)clarity test
âą Particulate matter is defined as unwanted mobile
insoluble matter other than gas bubble present in the
product.
âą If the particle size of foreign matter is larger than the
size of R.B.C.. It can block the blood vessel.
âą The permit limits of particulate matter as per I.P. are
follows:
25. C)leakage test
âą The sealed ampoules are subjected to small cracks
which occur due to rapid temperature changes or due
to mechanical shocks.
Filled & sealed ampoules
Dipped in 1% Methylene blue solution
Under negative pressure in vacuum chamber
Vacuum released colored solution enter into the ampoule
Defective sealing
Vials & bottles are not suitable for this test because the
sealing material used is not rigid
26. D)pyrogen test
ï¶ Pyrogen = âPyroâ (Greek = Fire) + âgenâ (Greek
= beginning).
ï¶ Fever producing, metabolic by-products of
microbial growth and death.
ï¶ Bacterial pyrogens are called âEndotoxinsâ.
Gram negative bacteria produce more potent
endotoxins than gram + bacteria and fungi.
ï¶ Endotoxins are heat stable lipopolysaccharides
(LPS) present in bacterial cell walls, not present
in cell-free bacterial filtrates
27. Method
ï¶ Dissolve the subs being examined in, or dilute it with a pyrogen free saline
solution
ï¶ Warm the liquid being examined to approx. 38.5o C temp before injection
ï¶ The volume of injection is NLT 0.5ml/kg & NMT 10ml/kg of body weight
ï¶ Withhold water during test
ï¶ Clinical thermometer is inserted into the rectum of rabbit to record body temp
ï¶ 2 normal reading of rectal temp are should be taken prior to the test injection
at an interval of half an hr & its mean is calculated- initial temp
ï¶ The solution under test is injected through an ear vein
ï¶ Record the temp of each rabbit in an interval of 30 min for 3 hrs
ï¶ The difference between initial temp & maximum temp is recorded- taken as
response
29. Limulus amebocyte lysate [LAL]
test
âą Limulus amebocyte lysate [LAL] test another
method for the determination of pyrogenic
endotoxins
âą In this method the test solution is combined
with a cell lysate from the ameabocyte [blood
celels] of horse shoe crab
âą Any endo toxin that might be present will be
coagulated with protien fraction of the
ameabocytes and results in the formation of a
gel
âą This consider to be simple,rapid and of greater
sensitivity that the rabbit test
30. E)assay
âą Assay is performed according to method
given In the monograph of that parental
preperation in the pharmacopoeia
âą Assay is done to check the quantity of
medicament present in the parenteral
preperation
31. References
âą Encyclopedia of pharmaceutical technology by James
Swarbrick pg.no.1266-1299
âą Pharmaceutical product development by N.K.JAIN
âą Chemical Incompatibility of Parenteral Drug Admixtures; T.
J. Mccarthy; S.A. Medical journal 2
âą The theory & pratice of âIndustrial Pharmacyâ Leon
Lachman ,Herbert A. Liberman.special Indian Edition 2009
Pg. No.693-680.
âą Modern Pharmaceutics Fourth Edition, Revised and
Expanded, Edited By G.S.Banker & C.T.Rhodes, Marcel
Dekker pg387-389.
âą The Science & practice of Pharmacy, By Remington, Vol-
01, Edi.21st, Lippincott Publication, pg-838-840.