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NEW ANALGESIC IN THE MANAGEMENT OF PAIN
IN THIS MILLANEUM – RECENT PERSPECTIVES -
FLUPIRTINE
             Prof. A.V. SRINIVASAN,
             MD, DM, Ph.D, F.A.A.N, F.I.A.N.
                       Emeritus Professor
          The Tamilnadu Dr. M.G.R. Medical University
                          Former Head
         Institute of Neurology, Madras Medical College
2

Presentation Points




Being ignorant is not so much a shame as being unwilling to learn
3

  Rationale
 Analgesics are used in clinical practice for a variety of painful conditions

 NSAIDs are the most commonly used analgesic-anti-inflammatory drugs, but have GI ADRs

 Opioid analgesics are also used in moderate-severe painful conditions, but have their own
  limitations due to unwanted side effects

 Flupirtine is an amino-substituted pyridine derivative, centrally-acting, but non-opioid analgesic

 Molecular structure and mechanisms do not resemble any other currently available analgesic
  agent




   “The True Art of Memory is The Art of Attention”                              - S.Johnson
4

Presentation Points




 “ We Sometimes think we have forgotten something when
 in fact we never really learned it in the first place”
 Imp.Your Memory Skills
5

  Pain Sensation
 Pain is an unpleasant sensation that originates from ongoing or impending tissue damage

 Management of different types of pain (acute, postoperative, inflammatory, neuropathic, cancer-
  related and chronic) is the most frequent problem encountered by clinicians

 Drug therapy is the first line of approach for the treatment of pain




     Through Action You Create your Own Education - D.B. ELLIS
6

  Pain Sensation
 Acute pain >> normal and predictable physiologic response to adverse chemical, thermal, or
  mechanical stimulus; it is associated with surgery, trauma, or acute illness and is usually
  experienced for a limited and defined period of time

 Chronic pain usually present for a period exceeding 3 weeks and usually associated with
  neuropathic pain, cancer-related pain and certain types of arthritis (OA and RA)




    Thought is the labour of the intellect
    Reverie is its pleasure
7
  Pain classified according to underlying
  mechanisms
 Nociceptive caused by tissue injuries and damage

 Inflammatory pain

 Neuropathic caused by nerve injuries




               Imagination is more Important than Knowledge
8

     Management
1.   Anti-inflammatory drugs
2.   Skeletal muscle relaxants
3.   Physiotherapy
4.   Back exercises
5.   Support belt
6.   Surgery for severe cases




             A open foe may prove a curse ; but a pretended friend is worse
9

  Low Back Pain
 Annually 15-45% of adults suffer from low back pain

 Lifetime prevalence is at least 70%

 Most prevalent among adults 35-55 yrs old

 Associated with substantial disability

 Economic impact
     Absenteeism
     Increased utilization of health care resources




    It is a great misfortune not to possess sufficient wit to
    speak well
10

  Low Back Pain
Frequently due to minor problems

1.Poor posture
2.Mild cases of PID
3.Muscular strain (lumbago)




            You are what you think and not what you think you are
11

  Periarticular Pain
1. Bursitis

2. Tendonitis (tennis elbow)




              Discipline Weighs ounces; Regret weighs Tons
12

  Frozen Shoulder
Inflammation of tissues surrounding shoulder
  joint
     1. Degenerative process
     2. Muscle tear
     3. Bursitis

Also called scapulohumeral periarthritis




       A great many people think they are thinking when they are merely re
       arranging their prejudices
                                                    W. James
13

  Post-operative Pain
 Millions of surgeries are performed on an annual basis, necessitating the frequent use of acute postoperative
  pain management

 There are many types of surgery and, with few exceptions, all are painful

 More than 80% of patients experience post-operative pain

 Important issues in managing post-operative pain
     Optimizing pain management for the individual patient
     Ensuring safety
     Minimizing side effects
     Maintaining ease of use for staff and patients
     Reducing complications




Many Ideas grow better when transplanted into another mind than in
the one where they sprang UP
                                    O.W. Holmos
14

     Post-operative pain still undermanaged




 1
  Apfelbaum JL, et al. Postoperative pain experience: results from a national survey suggest postoperative pain continues to
 be undermanaged. Anesth Analg, 2003




A woman’s desire for revenge outlasts all her other emotions
15

Presentation Points




     Every discovery contains an irrational element or
     4 creative intuition
16


       Nociceptive Pain Pathways




I have never let my Medical schooling interfere with my education
                               Mark Twain
17

   Low Back Pain
 Lifting even smaller weights in the wrong
 way can cause low back pain



                                             Sitting for long hours with poor postures places
                                             strain on back muscles




We learn by thinking and the quality of the learning outcome is determined
by the quality of our thoughts
                                                R.B. Schmeck
18

Mediators involved in pain mechanisms




  When they tell you to grow up, they mean stop growing
                                 Piccaso
19

Different target sites for analgesics




    A medical school should not be a preparation for life.
    A school should be life
20

Limitations of Opioids and NSAIDs



Opioids Drugs




NSAIDs



           “Social Isolation is in itself a pathogenic
           Factor for disease production”
21

 Presentation Points




Through Action You Create your Own Education   - D.B. ELLIS
22

   Flupiritine Spectrum of Activity




    1
     Friedel and Fittion, Drugs 1993/ 2Schuster, CNS Drugs 1999/3Sheridan et al. Neurology 1986/4Schwarz, et al. J Neurol
    Transm, 1996

Serious, sincere, systematic study surely secures supreme success
23

  Flupirtine: Mechanisms are different from opioids
I. Flupirtine does not show any relevent affinity for opiate receptors
• Structurally different from morphine
• Analgesic activity is not altered by opiate antagonist naloxone

II. Flupirtine does not show any relevent influence on 5HT receptors
• Analgesic activity is not altered by 5HT receptor antagonist cyproheptadine

III. Does not influence the BDZ receptors or the α-1 or α-2 adrenergic receptors or nicotinic or
     muscarinic receptors

IV.Low potential for drug abuse, drug dependence, tolerance or withdrawal symptoms1



   Ringe JD, et al. Analgesic Efficacy of Flupirtine in primary care of patients with osteoporosis related pain. Arzneim.-Forsch./Drug
   Res. 53, No. 7, 496−502 (2003)



                   Discipline Weighs ounces Regret
                   weighs Tons
24

  Flupirtine indirectly influences NMDA receptors
Mechanism of action has yet to be fully explained: evidence that flupirtine interacts with
glutamatergic N-Methyl-D-Aspartate (NMDA) receptor1,2.3,4,5

Not possible to demonstrate direct effect on NMDA receptor: all findings point to indirect influence
on NMDA receptor (functional NMDA antagonism)




 1
  Block F, et al. NeuroReport 1994/2Rupalla K, et al. Eur J Pharmacol 1995/3Perovil S, et al. Neurodegeneration
 1995/4Osborne NN et al. Brain Research 1994/ 5Schwarz M, et al. NeuroReport 1994


                          Experience can be defined as
                          yesterday’s answer to today’s
                          problems
25

 Glutamate Receptors
                                       Glutamate receptors
                                       Glutamate receptors



           Ionotropic receptors                              Metabotropic receptors



    NMDA         AMPA        Kainate                         Gr I     Gr II      Gr III




The secret of walking on water is Knowing where the stones are
26

NMDA Receptors




Memory, the daughter of attention, is the teeming mother
of knowledge - Martin Tupper
27

NMDA Receptors




Science is below the mind; Spirituality is beyond the mind
28

    Flupirtine as a SNEPCO
            Flupirtine
                                        KCNQ
                                                      Stabilizes membrane: inhibits
                                                      incoming pain signals

             G-protein                                                          NMDA-receptor with Mg+2 block

                                   K+                                           ↓ Ca+2 increase after excitotoxic
                                                                                stimulation
    Interaction with G-protein-activated inwardly rectifying K+ channels (GIRK) >> opening of which
    leads to stabilization of RMP of neuronal cells >> causes an indirect inhibition of NMDA receptor.
    At therapeutically relevant concentration, flupirtine is a selective neuronal potassium channel
    opener (SNEPCO)1
1
    Kornhuber J, et al. J Neural Transm 1999; 106: 857-867



               Science is below the mind; Spirituality is beyond the mind
29

   Analgesic Activity: Animal Studies

                    Methadone
                     Methadone                             Flupirtine
                                                           Flupirtine                      Dextroproxyphene
                                                                                           Dextroproxyphene
                   Buprenorphine
                   Buprenorphine              >                                    >            Codeine
                                                                                                Codeine
                     Morphine
                     Morphine                             Pentazocine
                                                          Pentazocine                         Phenacetin
                                                                                               Phenacetin
                                                                                             Paracetamol
                                                                                              Paracetamol

 • Max analgesia reached at 30 min post-dose
 • Duration of effects: at least 75 min
 • Flupirtine classified as medium to strong analgesic with onset/duration similar to codeine



       Jakovlev V, et al. Arzneimittel-Forschnug 35: 30-43; 1985
       Nickel B. The antinociceptive activity of flupirtine: a structurally new analgesic. Postgrad Med Journal 63(Suppl 3),19-28, 1987



Success is a prize to be won. Action is the road to it.
Chance is what may lurk in the shadows at the road side.
30

  Flupirtine Indications
 Available as 100 mg capsules

 Indicated for use in acute and chronic pain conditions such as
     painful musculoskeletal conditions with or without spasm
     pains after traumatic/orthopedic/general surgical/gynecological operations and injuries
     stress headaches
     cancer-related pain
     dysmenhorrhea
     neuropathic pain




                       NATURE, TIME AND PATIENCE
                       are the 3 great physicians
31

      Pharmacokinetic Data
  •                        Studies included both young and elderly healthy volunteers
  •                        Studies included patients with mild/mod renal impairment, liver disease
                           and epilepsy
  Parameter                       Data (200 mg flupirtine maleate orally)
  Bioavailability      90% (Freely soulble in water and undergoes rapid gastric absorption and
                                          appears in plasma in 15-30 min)
  Cmax              1.98 mg/L (Plasma concentrations are linearly related over the dose range from
                                                     50-300 mg)
  Tmax                                                   2 hr
  Half-life              ~ 9.6 hr (Drug accumulation not observed after oral admin of 100 mg)
  Vd                                                     1.16 L/kg
  Protein binding                                         ~84 %
  Metabolism          Hepatic [2 active metabolites with 20-30% of analgesic activity of parent
                                                     compound]
  Excretion                                72% renal and 18% fecal excretion
Memory, Pity and Beauty are short lived in life;
But tinged with emotion persist in life
Pharmacokinetic Data in Special
                                                                                                                               32



   Populations
    Parameter                                Data (100 mg flupirtine maleate orally)
                                  Healthy volunteers                   Hepatic Impairment                  Renally impaired
                               18-35 yrs           66-83 yrs                                             ClCr = 44-99 ml/min
 Cmax                          0.77 mg/L          1.12 mg/L                     1 mg/L                          0.72 mg/L
 Tmax                             1.6 hr             1.8 hr                     2.5 hr                             1.8 hr
 Half-life                        6.5 hr              14 hr                 Not reported                           9.8 hr
 Total body clearance           16.5 L/hr           9.7 L/hr                Not reported                         15.8 L/hr

 Mean elimination half-life of flupirtine was higher in elderly patients than in younger normal subjects, and this was
 associated with an increased maximum serum concentration and reduced clearance



   Abrams SM, et al. Pharmacokinetics of flupirtine in elderly volunteers and in patients with moderate renal impairment.
   Postgrad Med J. 1988 May;64(751):361-3.


It is the disease of not listening, the malady of not marking,
 that I am troubled withal - Shakespeare
33

  Flupirtine Dosage
 100 mg, three to four times daily

 For severe pain, 200 mg three times daily (daily dose exceeding 600 mg not advisable)




                      The sign wasn’t placed there
                      By the Big Printer in the sky
34

  Flupirtine Dosage in Special Populations
 For elderly patients: 100 mg twice daily initially, increased to thrice daily if needed

 For patients with impaired renal function: 100 mg thrice daily (with careful monitoring)

 For patients with impaired hepatic function: use carefully with monitoring of liver enzymes

 Pediatric patients: adequate trials have not been conducted in these patients

 Pregnancy and Lactation: safety and efficacy studies have not been conducted
 Flupirtine can be excreted into breast mik in lactating mothers




          The art of medicine is caring for the heart of the patient
35

     Flupirtine Contraindications
    Patients with a risk of a hepatic encephalopathy
    Patients with cholestasis
    Patients with myasthenia gravis
    Patients with pre-existing liver disease and alcohol abuse
    In patients with hypersensitivity to flupirtine maleate or any other ingredient of this formulation




Every thing should be made as simple as possible; but not simpler
36

  Flupirtine Precautions
 May cause sedation: patients should not undertake driving vehicles or operation machinery

 More care if alcohol is also consumed




              Speak obligingly even if you cannot oblige
37

  Flupirtine Drug Interactions
 Flupirtine can intensify the action of alcohol and medicines which exhibit sedative or muscle-
  relaxing properties

 Flupirtine may displace warfarin from its protein binding and thus increase the anticoagulant
  effect necessitating dosage changes of warfarin

 Flupirtine with paracetamol or carbamazepine should not be used




                     Develop the heart; art comes automatically
38

Flupirtine Adverse Effects




                                               Rare
                                               ↑ in liver
                                               enzymes,
                                               hepatitis




        Knowledge without action is useless;
        Action without knowledge is foolish
39

    Analgesic Activity: Human Studies
    Author                   Dose             Test                                Results
    Hummel                   50-100           CO2 application to                  Linear dose-related reduction in
    (1991)1                  mg               nasal mucosa                        pain intensity
    Kobal (1988)2            200 mg           CO2 application to                  Pain threshold ↑ within 30-60 min
                                              nasal mucosa                        with max effect 1.5-2 hr postdose
    Bromm (1987)3 IV 80 mg                    Evoked cerebral                     Equivalent analgesia with flupirtine
                                              potentials in response              and pentazocine
                                              to phasic pain stimuli
    Gatto (1886)4                             Thermal stimulation of              Flupirtine superior to placebo
                                              tooth pulp                          producing ↑ pain threshold within
                                                                                  15 min and lasting up to 45 min



1
 Hummel T, et al. Dose-related analgesic effects of flupirtine. Br Journal of Clin Pharmacol. 32; 69-76; 1991
2
 Kobal G, et al. Effects of flupirtine on pain-related evoked potential and spontaneous EEG. Agents and Actions. 23: 117-19; 1988
3
 Bromm B. Assessment of analgesia by evoked cerebral potential measurements in humans. Postgrad Med J. 63: 9-13; 1987
4
 Gatto R. et al. Study on the analgesic effect of flupirtine in dentistry. Quadeni di Odontostomatologia. 3: 71-82: 1986
40

          Post-op pain in general Sx setting
 Analgesic efficacy of flupirtine versus placebo in 28 patients undergoing general surgical procedures
 Pain intensity measured on a 5-point scale (no pain – unbearable pain)
 Dose used: 100 mg orally single dose
 Assessments at baseline and 3 and 6 hr post-dose

                                                    Reduction in pain intensity
                                                    Reduction in pain intensity
percent




Borgognone A, et al. A new non-opioid analgesic (flupirtine) in the treatment of postoperative pain. Therapeutika 1986; 86: 1-
41

   Post-op pain in orthopedic setting
Analgesic efficacy of flupirtine versus codeine in 66 patients undergoing hip replacement Sx
Pain relief measured on 5-point scale (0 = none and 4 = unbearable)
Dose used: FLU 100-200 mg orally as required (min interval of 4 hrs between doses)
             PENTAZOCIN 50-100 mg orally as required (min interval of 4 hrs between doses)

              Patients (n) in each severity grade on d1
              Patients (n) in each severity grade on d1                          Patients (n) in each severity grade on d4
                                                                                 Patients (n) in each severity grade on d4




Galasko CSB, et al. Current Medical Research and Opinion, 1985, vol 9: 594-601
42

   Post-op pain in orthopedic setting
FLU group: time taken for pain relief gradually decreased from 52 min to 32 min
PENTAZOCIN group: small progressive increase from 42 to 48 min
No significant differences between groups

        Time taken for pain relief after drug administration (min)
        Time taken for pain relief after drug administration (min)               Complete pain relief after drug administration (%)
                                                                                 Complete pain relief after drug administration (%)




Galasko CSB, et al. Current Medical Research and Opinion, 1985, vol 9: 594-601
43

   Post-op pain in orthopedic setting
Higher proportion of patients reported being satisfied with flupirtine than with pentazocin

                                                Patients satisfied with analgesia (%)
                                                Patients satisfied with analgesia (%)




Galasko CSB, et al. Current Medical Research and Opinion, 1985, vol 9: 594-601
44

Post-op pain in orthopedic setting




Galasko CSB, et al. Current Medical Research and Opinion, 1985, vol 9: 594-601




Teachers are reservoirs from which, through the process
of education, the students draw the water of life
45

   Post-op pain in orthopedic Sx setting
 Analgesic efficacy of flupirtine versus diclofenac sodium for post-op patients in elective orthopedic
 Sx settings (n = 40)
 Dose used: 100 mg orally single dose (FLU) x 4 doses (max/day); n = 20
              50 mg orally single dose (DIC) x 4 doses (max/day); n = 20
 Assessments made 30 and 60 min post-dose and 1 hrly for 6 hrs on 100 mm VAS (0 = no pain and
 100 = max conceivable pain)
 Pain relief measured on 100 mm VAS (0 = no pain relief and 100 = total relief)


            Overall Clinical Assessment (values = number of patients)
 Therapy                          Excellent                 Good     Moderate               Useless
 Flupirtine (n = 20)                   4                     2            8                    6
 Diclofenac (n = 20)                   1                     4            4                    11

   Mastronardi P, et al. J Int Med Res, 1988; 16: 338-348

It is not your position that makes you happy or unhappy
It is your disposition
46

Post-op pain in orthopedic Sx setting
                  Analgesic effect of first administration of FLU or DIC (mean VAS scores)




Mastronardi P, et al. J Int Med Res, 1988; 16: 338-348




                         A good teacher is a perpetual learner
47

 Post-op pain in orthopedic Sx setting
                  Analgesic effect of third administration of FLU or DIC (mean VAS scores)




                                   *               *       *    *           *           *    *




      * Statistically significant between groups

  Mastronardi P, et al. J Int Med Res, 1988; 16: 338-348




Learn to adapt, adjust and accommodate
Learn to give, not to take and learn to serve not to rule
48

 Post-op pain in orthopedic Sx setting




 Mastronardi P, et al. J Int Med Res, 1988; 16: 338-348



Hate screeches, fear squeals; conceits trumpets
but love since lullabies
49

   Post-op pain in gynecological Sx setting
Analgesic efficacy of flupirtine versus dihyrdrocodeine for post-op patients with abdominal
hysterectomy (n = 50)
Pain intensity measured on a 4-point scale (0= no pain – 3 = severe pain)
Dose used: 100 mg orally single dose (FLU); n = 25
            60 mg orally single dose (Dihydrocodeine); n = 25
Assessments made twice daily x 3 days post-op
                 Pain intensity and relief scores
                 Pain intensity and relief scores              Total analgesic and antiemetics interventions
                                                               Total analgesic and antiemetics interventions




Moore RA ,et al. Br J Anaesth. 1983; 55: 429-432
50

    Post-op pain in gynecological Sx setting




     Moore RA ,et al. Br J Anaesth. 1983; 55: 429-432




Reputation is made in a moment; character is built in a life time
51

   Clinical experience with flupirtine in US
1300 pts evaluated (episiotomy, surgical or dental procedures) at 26 study sites
Placebo evaluations or versus paracetamol 650 mg, codeine 60 mg, pentazocin 50 mg or oxycodone
10/paracetamol 650 mg
FLU 100-300 mg (max 600 mg/d)
                                                 Total Pain Relief (TOPAR) scores
                                                 Total Pain Relief (TOPAR) scores




McMahon FG, et al. Postgrad Med Journal , 1987; 63: 81-85
52

 Clinical experience with flupirtine in US




  McMahon FG, et al. Postgrad Med Journal , 1987; 63: 81-85




Character gets you out of bed commitment moves you to
action faith, hope and Discipline follow through to
53




Phase IV study in 869
patients

Max dose 600 mg/d
Duration: 2-90 days

VAS 10 pt scale:
0 = none
10 = maximum pain relief
20 patients had 29 AEs (2.4%)
                      20 patients had 29 AEs (2.4%)
     19 AEs rated as drug-related
     19 AEs rated as drug-related    10 AEs rated possibly not drug-related
                                     10 AEs rated possibly not drug-related
         1.3% CNS related
         1.3% CNS related
         1.1% GI related
         1.1% GI related
         no drug dependency
         no drug dependency
         no tolerance
         no tolerance
         no withdrawal symptoms
         no withdrawal symptoms
         25 of 29 AEs resolved by study end
         25 of 29 AEs resolved by study end
          wisdom to listen - Hodly’s
          to speak and it is the privilege of the
          It is the providence of the knowledge
54
55

Efficacy of flupirtine in osteoporosis pain




 Ringe, et al. Arzneim Forschung, 2003



Opinion is ultimately determined by the feelings
and not by the intellect
56

   Low Back Pain: Comparison with Tramadol
209 patients with moderate-severe subacute LBP randomized to either flupirtine or tramadol
Flupirtine 100 mg x 3 times/d x 5-7 d (n = 105)
Tramadol 50 mg x 3 times/d x 5-7d (n = 104)
Assessment on Numerical Rating Scale 0 = no pain to 10 = worst pain imaginable

                                                        Pain Relief Rates
                                                        Pain Relief Rates




Li C, et al. Current Medical Research and Opinion 2008, 24(12): 3523-3530
57

Low Back Pain: Comparison with Tramadol
                 Mean LBP Intensity Scores
                 Mean LBP Intensity Scores                                  ADR events and ADR related dropouts (%)
                                                                            ADR events and ADR related dropouts (%)




                                                                                        p = 0.02




                  59%                           56%                                                       p < 0.001




Li C, et al. Current Medical Research and Opinion 2008, 24(12): 3523-3530



           A great many people think they are thinking when
           they are merely re arranging their prejudices
                                                   W. James
58

Low Back Pain: Comparison with Tramadol




Li C, et al. Current Medical Research and Opinion 2008, 24(12): 3523-3530


      The Truth is fear and immorality are two of the
      greatest inhibitors of Performance to progress
59

   Efficacy in Musculo-Skeletal Disorders
 7,806 pts with musclo-skeletal disorders (cervical/lumbar spine pain, myofascial pain, tension
 headache, muscle spasm associated with arthritis) evaluated
 Flupirtine 100 mg (2-3 doses/d) max dose 600 mg/d
 Assessment on pain scale: 0 = no pain to 4 = very severe pain




  G.Mueller-Schwefe. Progress of Medicine 121 Jg.- Original No.1/2003, Pg.11-18

A true commitment is a heart felt promise to yourself from
which you will not back down -
                              D. Mcnally
60

Efficacy in Musculo-Skeletal Disorders
     % patients with response (improvement by at
     % patients with response (improvement by at                         % patients with continuous pain at beginning
                                                                         % patients with continuous pain at beginning
              least 1 step) at end of 1 wk
               least 1 step) at end of 1 wk                                          and end of 4 wks Rx
                                                                                     and end of 4 wks Rx




G.Mueller-Schwefe. Progress of Medicine 121 Jg.- Original No.1/2003, Pg.11-18


                      Serious, sincere, systematic
                      studies,
                       surely secure supreme success
61

   Efficacy in Musculo-Skeletal Disorders
       % patients with response (improvement by at least 1
       % patients with response (improvement by at least 1               % patients with response (improvement by at least 1
                                                                         % patients with response (improvement by at least 1
                step): reduction of muscle spasm
                 step): reduction of muscle spasm                                 step): restriction of daily activities
                                                                                  step): restriction of daily activities




   G.Mueller-Schwefe. Progress of Medicine 121 Jg.- Original No.1/2003, Pg.11-18



God is a comedian performing before an audience
that is afraid to laugh
62

   Clinical experience in migraine
47 pts with migraine evaluated
Flupirtine (n = 24) 100 mg (up to 4 doses/d x 5 d)
Paracetamol (n = 23) 1 gm (up to 4 doses/d x 5 d)

        60              % patients unable to work
                                                                         20                   % patients confined to bed
        50                                                                                  PAR
                      PAR
        40
% pts                                                            % pts 10
        30                                                                            FLU

        20

        10
                  FLU                                                    0

        0
                                                                                      1           2      3        4        5
                1          2           3          4          5

Million R, et al. Current Medical Research and Opinion, 1984; vol 9 (no 3): 204-212
63

   Clinical experience in migraine
                                   Mean VAS scores of pain severity during migraine attack
                                    70

                                    60

                                    50

                                    40
                           Score
                                    30
                                                                  PAR
                                    20
                                                            FLU
                                    10

                                    0

                                                                                              Time (d)
                                                1            2           3            4   5
Million R, et al. Current Medical Research and Opinion, 1984; vol 9 (no 3): 204-212
64

Clinical experience in migraine




Million R, et al. Current Medical Research and Opinion, 1984; vol 9 (no 3): 204-212




              Man is made by his beliefs; as he beliefs, so he is
65




10 patients with tumor/chemoRx/radioRx-related neuropathic pain not controlled with opioid drugs
Flupirtine 100 mg x 4 times/d x 8 d (max dose 300 mg x 4 times/d)
Opioid Rx was continued during trial
Assessment of pain relief by Wisconsin Brief Pain Questionnaire (0 = no pain to 10 = worst pain)




          *                                                                                          *


    * Patient # 1 and 10 could not understand the questionnaire and hence values are not available
66




The word shall perish not for lack of wonders but lack of wonder
67




71 patients with cancer-related pain not controlled with opioid drugs
Flupirtine 100 mg x 4 times/d x 4 wks (max dose 100 mg x 6 times/d); n = 35
Tramadol 50 mg x 4 times/d x 4wks (max dose 50 mg x 6 times/d); n = 36
Assessment of pain relief by scale (1 = pain free to 5 = severe pain)

                                   Pain Intensity Differences after 4 wks
                                   Pain Intensity Differences after 4 wks



             No Pre-Rx             Successful Pre-Rx       Not successful Pre-Rx   All patients




        In any field, find the strangest thing and explore it
68




                % pts with pain alleviation after 4 wks
                % pts with pain alleviation after 4 wks




              54 %
                                          36 %



There are sixty trillion cells in the human body
69

Presentation Points




“Men of Genius Admired:
Men of Wealth envied
women of power feared but only
women of character are trusted”

                      A- Friedman
70

    Summary
 Flupirtine is a centrally acting,non-opioid analgesic that exhibits additionally muscle relaxing
  activity
 Has been used in Europe for 20 years in treatment of pain states such as post-Sx, arthritis, and
  muscular pain syndromes
 Flupirtine has been found in clinical trials to be safe and well tolerated 1,2,3,4
 Free of the opioid-related respiratory depression, dependence potential, and constipation4,5
 Devoid of cardiac effects in humans during prolonged exposure5
 Useful adddition alone and in combination with NSAIDs to control pain




1
  Scheef W. Analgesic efficacy and safety of oral flupirtine in the treatment of cancer pain. J Postgrad Med 1987;63(suppl 3):67–
70
2
  Galasko CS, et al. Trial of oral flupirtine maleate in the treatment of pain after orthopaedic surgery. Curr Med Res Opin
1985;9(9):594–601
3
  Heusinger JH. Efficacy and tolerance of flupirtine and pentazocine in 2 multicentre trials. J Postgrad Med 1987;63(suppl 3):71–9
4
  Riethmuller-Winzen H. Flupirtine in the treatment of post-operative pain. Postgrad Med J 1987; 63(suppl 3):61–5
5
  Scheef W, Wolf-Gruber D. [Flupirtine in patients with cancer pain]. Arzneimittelforschung 1985; 35(1):75–7
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New analgesic in the management of pain in this millennium recent perspectives-flupirtine

  • 1. NEW ANALGESIC IN THE MANAGEMENT OF PAIN IN THIS MILLANEUM – RECENT PERSPECTIVES - FLUPIRTINE Prof. A.V. SRINIVASAN, MD, DM, Ph.D, F.A.A.N, F.I.A.N. Emeritus Professor The Tamilnadu Dr. M.G.R. Medical University Former Head Institute of Neurology, Madras Medical College
  • 2. 2 Presentation Points Being ignorant is not so much a shame as being unwilling to learn
  • 3. 3 Rationale  Analgesics are used in clinical practice for a variety of painful conditions  NSAIDs are the most commonly used analgesic-anti-inflammatory drugs, but have GI ADRs  Opioid analgesics are also used in moderate-severe painful conditions, but have their own limitations due to unwanted side effects  Flupirtine is an amino-substituted pyridine derivative, centrally-acting, but non-opioid analgesic  Molecular structure and mechanisms do not resemble any other currently available analgesic agent “The True Art of Memory is The Art of Attention” - S.Johnson
  • 4. 4 Presentation Points “ We Sometimes think we have forgotten something when in fact we never really learned it in the first place” Imp.Your Memory Skills
  • 5. 5 Pain Sensation  Pain is an unpleasant sensation that originates from ongoing or impending tissue damage  Management of different types of pain (acute, postoperative, inflammatory, neuropathic, cancer- related and chronic) is the most frequent problem encountered by clinicians  Drug therapy is the first line of approach for the treatment of pain Through Action You Create your Own Education - D.B. ELLIS
  • 6. 6 Pain Sensation  Acute pain >> normal and predictable physiologic response to adverse chemical, thermal, or mechanical stimulus; it is associated with surgery, trauma, or acute illness and is usually experienced for a limited and defined period of time  Chronic pain usually present for a period exceeding 3 weeks and usually associated with neuropathic pain, cancer-related pain and certain types of arthritis (OA and RA) Thought is the labour of the intellect Reverie is its pleasure
  • 7. 7 Pain classified according to underlying mechanisms  Nociceptive caused by tissue injuries and damage  Inflammatory pain  Neuropathic caused by nerve injuries Imagination is more Important than Knowledge
  • 8. 8 Management 1. Anti-inflammatory drugs 2. Skeletal muscle relaxants 3. Physiotherapy 4. Back exercises 5. Support belt 6. Surgery for severe cases A open foe may prove a curse ; but a pretended friend is worse
  • 9. 9 Low Back Pain  Annually 15-45% of adults suffer from low back pain  Lifetime prevalence is at least 70%  Most prevalent among adults 35-55 yrs old  Associated with substantial disability  Economic impact  Absenteeism  Increased utilization of health care resources It is a great misfortune not to possess sufficient wit to speak well
  • 10. 10 Low Back Pain Frequently due to minor problems 1.Poor posture 2.Mild cases of PID 3.Muscular strain (lumbago) You are what you think and not what you think you are
  • 11. 11 Periarticular Pain 1. Bursitis 2. Tendonitis (tennis elbow) Discipline Weighs ounces; Regret weighs Tons
  • 12. 12 Frozen Shoulder Inflammation of tissues surrounding shoulder joint 1. Degenerative process 2. Muscle tear 3. Bursitis Also called scapulohumeral periarthritis A great many people think they are thinking when they are merely re arranging their prejudices W. James
  • 13. 13 Post-operative Pain  Millions of surgeries are performed on an annual basis, necessitating the frequent use of acute postoperative pain management  There are many types of surgery and, with few exceptions, all are painful  More than 80% of patients experience post-operative pain  Important issues in managing post-operative pain  Optimizing pain management for the individual patient  Ensuring safety  Minimizing side effects  Maintaining ease of use for staff and patients  Reducing complications Many Ideas grow better when transplanted into another mind than in the one where they sprang UP O.W. Holmos
  • 14. 14 Post-operative pain still undermanaged 1 Apfelbaum JL, et al. Postoperative pain experience: results from a national survey suggest postoperative pain continues to be undermanaged. Anesth Analg, 2003 A woman’s desire for revenge outlasts all her other emotions
  • 15. 15 Presentation Points Every discovery contains an irrational element or 4 creative intuition
  • 16. 16 Nociceptive Pain Pathways I have never let my Medical schooling interfere with my education Mark Twain
  • 17. 17 Low Back Pain Lifting even smaller weights in the wrong way can cause low back pain Sitting for long hours with poor postures places strain on back muscles We learn by thinking and the quality of the learning outcome is determined by the quality of our thoughts R.B. Schmeck
  • 18. 18 Mediators involved in pain mechanisms When they tell you to grow up, they mean stop growing Piccaso
  • 19. 19 Different target sites for analgesics A medical school should not be a preparation for life. A school should be life
  • 20. 20 Limitations of Opioids and NSAIDs Opioids Drugs NSAIDs “Social Isolation is in itself a pathogenic Factor for disease production”
  • 21. 21 Presentation Points Through Action You Create your Own Education - D.B. ELLIS
  • 22. 22 Flupiritine Spectrum of Activity 1 Friedel and Fittion, Drugs 1993/ 2Schuster, CNS Drugs 1999/3Sheridan et al. Neurology 1986/4Schwarz, et al. J Neurol Transm, 1996 Serious, sincere, systematic study surely secures supreme success
  • 23. 23 Flupirtine: Mechanisms are different from opioids I. Flupirtine does not show any relevent affinity for opiate receptors • Structurally different from morphine • Analgesic activity is not altered by opiate antagonist naloxone II. Flupirtine does not show any relevent influence on 5HT receptors • Analgesic activity is not altered by 5HT receptor antagonist cyproheptadine III. Does not influence the BDZ receptors or the α-1 or α-2 adrenergic receptors or nicotinic or muscarinic receptors IV.Low potential for drug abuse, drug dependence, tolerance or withdrawal symptoms1 Ringe JD, et al. Analgesic Efficacy of Flupirtine in primary care of patients with osteoporosis related pain. Arzneim.-Forsch./Drug Res. 53, No. 7, 496−502 (2003) Discipline Weighs ounces Regret weighs Tons
  • 24. 24 Flupirtine indirectly influences NMDA receptors Mechanism of action has yet to be fully explained: evidence that flupirtine interacts with glutamatergic N-Methyl-D-Aspartate (NMDA) receptor1,2.3,4,5 Not possible to demonstrate direct effect on NMDA receptor: all findings point to indirect influence on NMDA receptor (functional NMDA antagonism) 1 Block F, et al. NeuroReport 1994/2Rupalla K, et al. Eur J Pharmacol 1995/3Perovil S, et al. Neurodegeneration 1995/4Osborne NN et al. Brain Research 1994/ 5Schwarz M, et al. NeuroReport 1994 Experience can be defined as yesterday’s answer to today’s problems
  • 25. 25 Glutamate Receptors Glutamate receptors Glutamate receptors Ionotropic receptors Metabotropic receptors NMDA AMPA Kainate Gr I Gr II Gr III The secret of walking on water is Knowing where the stones are
  • 26. 26 NMDA Receptors Memory, the daughter of attention, is the teeming mother of knowledge - Martin Tupper
  • 27. 27 NMDA Receptors Science is below the mind; Spirituality is beyond the mind
  • 28. 28 Flupirtine as a SNEPCO Flupirtine KCNQ Stabilizes membrane: inhibits incoming pain signals G-protein NMDA-receptor with Mg+2 block K+ ↓ Ca+2 increase after excitotoxic stimulation Interaction with G-protein-activated inwardly rectifying K+ channels (GIRK) >> opening of which leads to stabilization of RMP of neuronal cells >> causes an indirect inhibition of NMDA receptor. At therapeutically relevant concentration, flupirtine is a selective neuronal potassium channel opener (SNEPCO)1 1 Kornhuber J, et al. J Neural Transm 1999; 106: 857-867 Science is below the mind; Spirituality is beyond the mind
  • 29. 29 Analgesic Activity: Animal Studies Methadone Methadone Flupirtine Flupirtine Dextroproxyphene Dextroproxyphene Buprenorphine Buprenorphine > > Codeine Codeine Morphine Morphine Pentazocine Pentazocine Phenacetin Phenacetin Paracetamol Paracetamol • Max analgesia reached at 30 min post-dose • Duration of effects: at least 75 min • Flupirtine classified as medium to strong analgesic with onset/duration similar to codeine Jakovlev V, et al. Arzneimittel-Forschnug 35: 30-43; 1985 Nickel B. The antinociceptive activity of flupirtine: a structurally new analgesic. Postgrad Med Journal 63(Suppl 3),19-28, 1987 Success is a prize to be won. Action is the road to it. Chance is what may lurk in the shadows at the road side.
  • 30. 30 Flupirtine Indications  Available as 100 mg capsules  Indicated for use in acute and chronic pain conditions such as  painful musculoskeletal conditions with or without spasm  pains after traumatic/orthopedic/general surgical/gynecological operations and injuries  stress headaches  cancer-related pain  dysmenhorrhea  neuropathic pain NATURE, TIME AND PATIENCE are the 3 great physicians
  • 31. 31 Pharmacokinetic Data • Studies included both young and elderly healthy volunteers • Studies included patients with mild/mod renal impairment, liver disease and epilepsy Parameter Data (200 mg flupirtine maleate orally) Bioavailability 90% (Freely soulble in water and undergoes rapid gastric absorption and appears in plasma in 15-30 min) Cmax 1.98 mg/L (Plasma concentrations are linearly related over the dose range from 50-300 mg) Tmax 2 hr Half-life ~ 9.6 hr (Drug accumulation not observed after oral admin of 100 mg) Vd 1.16 L/kg Protein binding ~84 % Metabolism Hepatic [2 active metabolites with 20-30% of analgesic activity of parent compound] Excretion 72% renal and 18% fecal excretion Memory, Pity and Beauty are short lived in life; But tinged with emotion persist in life
  • 32. Pharmacokinetic Data in Special 32 Populations Parameter Data (100 mg flupirtine maleate orally) Healthy volunteers Hepatic Impairment Renally impaired 18-35 yrs 66-83 yrs ClCr = 44-99 ml/min Cmax 0.77 mg/L 1.12 mg/L 1 mg/L 0.72 mg/L Tmax 1.6 hr 1.8 hr 2.5 hr 1.8 hr Half-life 6.5 hr 14 hr Not reported 9.8 hr Total body clearance 16.5 L/hr 9.7 L/hr Not reported 15.8 L/hr Mean elimination half-life of flupirtine was higher in elderly patients than in younger normal subjects, and this was associated with an increased maximum serum concentration and reduced clearance Abrams SM, et al. Pharmacokinetics of flupirtine in elderly volunteers and in patients with moderate renal impairment. Postgrad Med J. 1988 May;64(751):361-3. It is the disease of not listening, the malady of not marking, that I am troubled withal - Shakespeare
  • 33. 33 Flupirtine Dosage  100 mg, three to four times daily  For severe pain, 200 mg three times daily (daily dose exceeding 600 mg not advisable) The sign wasn’t placed there By the Big Printer in the sky
  • 34. 34 Flupirtine Dosage in Special Populations  For elderly patients: 100 mg twice daily initially, increased to thrice daily if needed  For patients with impaired renal function: 100 mg thrice daily (with careful monitoring)  For patients with impaired hepatic function: use carefully with monitoring of liver enzymes  Pediatric patients: adequate trials have not been conducted in these patients  Pregnancy and Lactation: safety and efficacy studies have not been conducted  Flupirtine can be excreted into breast mik in lactating mothers The art of medicine is caring for the heart of the patient
  • 35. 35 Flupirtine Contraindications  Patients with a risk of a hepatic encephalopathy  Patients with cholestasis  Patients with myasthenia gravis  Patients with pre-existing liver disease and alcohol abuse  In patients with hypersensitivity to flupirtine maleate or any other ingredient of this formulation Every thing should be made as simple as possible; but not simpler
  • 36. 36 Flupirtine Precautions  May cause sedation: patients should not undertake driving vehicles or operation machinery  More care if alcohol is also consumed Speak obligingly even if you cannot oblige
  • 37. 37 Flupirtine Drug Interactions  Flupirtine can intensify the action of alcohol and medicines which exhibit sedative or muscle- relaxing properties  Flupirtine may displace warfarin from its protein binding and thus increase the anticoagulant effect necessitating dosage changes of warfarin  Flupirtine with paracetamol or carbamazepine should not be used Develop the heart; art comes automatically
  • 38. 38 Flupirtine Adverse Effects Rare ↑ in liver enzymes, hepatitis Knowledge without action is useless; Action without knowledge is foolish
  • 39. 39 Analgesic Activity: Human Studies Author Dose Test Results Hummel 50-100 CO2 application to Linear dose-related reduction in (1991)1 mg nasal mucosa pain intensity Kobal (1988)2 200 mg CO2 application to Pain threshold ↑ within 30-60 min nasal mucosa with max effect 1.5-2 hr postdose Bromm (1987)3 IV 80 mg Evoked cerebral Equivalent analgesia with flupirtine potentials in response and pentazocine to phasic pain stimuli Gatto (1886)4 Thermal stimulation of Flupirtine superior to placebo tooth pulp producing ↑ pain threshold within 15 min and lasting up to 45 min 1 Hummel T, et al. Dose-related analgesic effects of flupirtine. Br Journal of Clin Pharmacol. 32; 69-76; 1991 2 Kobal G, et al. Effects of flupirtine on pain-related evoked potential and spontaneous EEG. Agents and Actions. 23: 117-19; 1988 3 Bromm B. Assessment of analgesia by evoked cerebral potential measurements in humans. Postgrad Med J. 63: 9-13; 1987 4 Gatto R. et al. Study on the analgesic effect of flupirtine in dentistry. Quadeni di Odontostomatologia. 3: 71-82: 1986
  • 40. 40 Post-op pain in general Sx setting Analgesic efficacy of flupirtine versus placebo in 28 patients undergoing general surgical procedures Pain intensity measured on a 5-point scale (no pain – unbearable pain) Dose used: 100 mg orally single dose Assessments at baseline and 3 and 6 hr post-dose Reduction in pain intensity Reduction in pain intensity percent Borgognone A, et al. A new non-opioid analgesic (flupirtine) in the treatment of postoperative pain. Therapeutika 1986; 86: 1-
  • 41. 41 Post-op pain in orthopedic setting Analgesic efficacy of flupirtine versus codeine in 66 patients undergoing hip replacement Sx Pain relief measured on 5-point scale (0 = none and 4 = unbearable) Dose used: FLU 100-200 mg orally as required (min interval of 4 hrs between doses) PENTAZOCIN 50-100 mg orally as required (min interval of 4 hrs between doses) Patients (n) in each severity grade on d1 Patients (n) in each severity grade on d1 Patients (n) in each severity grade on d4 Patients (n) in each severity grade on d4 Galasko CSB, et al. Current Medical Research and Opinion, 1985, vol 9: 594-601
  • 42. 42 Post-op pain in orthopedic setting FLU group: time taken for pain relief gradually decreased from 52 min to 32 min PENTAZOCIN group: small progressive increase from 42 to 48 min No significant differences between groups Time taken for pain relief after drug administration (min) Time taken for pain relief after drug administration (min) Complete pain relief after drug administration (%) Complete pain relief after drug administration (%) Galasko CSB, et al. Current Medical Research and Opinion, 1985, vol 9: 594-601
  • 43. 43 Post-op pain in orthopedic setting Higher proportion of patients reported being satisfied with flupirtine than with pentazocin Patients satisfied with analgesia (%) Patients satisfied with analgesia (%) Galasko CSB, et al. Current Medical Research and Opinion, 1985, vol 9: 594-601
  • 44. 44 Post-op pain in orthopedic setting Galasko CSB, et al. Current Medical Research and Opinion, 1985, vol 9: 594-601 Teachers are reservoirs from which, through the process of education, the students draw the water of life
  • 45. 45 Post-op pain in orthopedic Sx setting Analgesic efficacy of flupirtine versus diclofenac sodium for post-op patients in elective orthopedic Sx settings (n = 40) Dose used: 100 mg orally single dose (FLU) x 4 doses (max/day); n = 20 50 mg orally single dose (DIC) x 4 doses (max/day); n = 20 Assessments made 30 and 60 min post-dose and 1 hrly for 6 hrs on 100 mm VAS (0 = no pain and 100 = max conceivable pain) Pain relief measured on 100 mm VAS (0 = no pain relief and 100 = total relief) Overall Clinical Assessment (values = number of patients) Therapy Excellent Good Moderate Useless Flupirtine (n = 20) 4 2 8 6 Diclofenac (n = 20) 1 4 4 11 Mastronardi P, et al. J Int Med Res, 1988; 16: 338-348 It is not your position that makes you happy or unhappy It is your disposition
  • 46. 46 Post-op pain in orthopedic Sx setting Analgesic effect of first administration of FLU or DIC (mean VAS scores) Mastronardi P, et al. J Int Med Res, 1988; 16: 338-348 A good teacher is a perpetual learner
  • 47. 47 Post-op pain in orthopedic Sx setting Analgesic effect of third administration of FLU or DIC (mean VAS scores) * * * * * * * * Statistically significant between groups Mastronardi P, et al. J Int Med Res, 1988; 16: 338-348 Learn to adapt, adjust and accommodate Learn to give, not to take and learn to serve not to rule
  • 48. 48 Post-op pain in orthopedic Sx setting Mastronardi P, et al. J Int Med Res, 1988; 16: 338-348 Hate screeches, fear squeals; conceits trumpets but love since lullabies
  • 49. 49 Post-op pain in gynecological Sx setting Analgesic efficacy of flupirtine versus dihyrdrocodeine for post-op patients with abdominal hysterectomy (n = 50) Pain intensity measured on a 4-point scale (0= no pain – 3 = severe pain) Dose used: 100 mg orally single dose (FLU); n = 25 60 mg orally single dose (Dihydrocodeine); n = 25 Assessments made twice daily x 3 days post-op Pain intensity and relief scores Pain intensity and relief scores Total analgesic and antiemetics interventions Total analgesic and antiemetics interventions Moore RA ,et al. Br J Anaesth. 1983; 55: 429-432
  • 50. 50 Post-op pain in gynecological Sx setting Moore RA ,et al. Br J Anaesth. 1983; 55: 429-432 Reputation is made in a moment; character is built in a life time
  • 51. 51 Clinical experience with flupirtine in US 1300 pts evaluated (episiotomy, surgical or dental procedures) at 26 study sites Placebo evaluations or versus paracetamol 650 mg, codeine 60 mg, pentazocin 50 mg or oxycodone 10/paracetamol 650 mg FLU 100-300 mg (max 600 mg/d) Total Pain Relief (TOPAR) scores Total Pain Relief (TOPAR) scores McMahon FG, et al. Postgrad Med Journal , 1987; 63: 81-85
  • 52. 52 Clinical experience with flupirtine in US McMahon FG, et al. Postgrad Med Journal , 1987; 63: 81-85 Character gets you out of bed commitment moves you to action faith, hope and Discipline follow through to
  • 53. 53 Phase IV study in 869 patients Max dose 600 mg/d Duration: 2-90 days VAS 10 pt scale: 0 = none 10 = maximum pain relief
  • 54. 20 patients had 29 AEs (2.4%) 20 patients had 29 AEs (2.4%) 19 AEs rated as drug-related 19 AEs rated as drug-related 10 AEs rated possibly not drug-related 10 AEs rated possibly not drug-related 1.3% CNS related 1.3% CNS related 1.1% GI related 1.1% GI related no drug dependency no drug dependency no tolerance no tolerance no withdrawal symptoms no withdrawal symptoms 25 of 29 AEs resolved by study end 25 of 29 AEs resolved by study end wisdom to listen - Hodly’s to speak and it is the privilege of the It is the providence of the knowledge 54
  • 55. 55 Efficacy of flupirtine in osteoporosis pain Ringe, et al. Arzneim Forschung, 2003 Opinion is ultimately determined by the feelings and not by the intellect
  • 56. 56 Low Back Pain: Comparison with Tramadol 209 patients with moderate-severe subacute LBP randomized to either flupirtine or tramadol Flupirtine 100 mg x 3 times/d x 5-7 d (n = 105) Tramadol 50 mg x 3 times/d x 5-7d (n = 104) Assessment on Numerical Rating Scale 0 = no pain to 10 = worst pain imaginable Pain Relief Rates Pain Relief Rates Li C, et al. Current Medical Research and Opinion 2008, 24(12): 3523-3530
  • 57. 57 Low Back Pain: Comparison with Tramadol Mean LBP Intensity Scores Mean LBP Intensity Scores ADR events and ADR related dropouts (%) ADR events and ADR related dropouts (%) p = 0.02 59% 56% p < 0.001 Li C, et al. Current Medical Research and Opinion 2008, 24(12): 3523-3530 A great many people think they are thinking when they are merely re arranging their prejudices W. James
  • 58. 58 Low Back Pain: Comparison with Tramadol Li C, et al. Current Medical Research and Opinion 2008, 24(12): 3523-3530 The Truth is fear and immorality are two of the greatest inhibitors of Performance to progress
  • 59. 59 Efficacy in Musculo-Skeletal Disorders 7,806 pts with musclo-skeletal disorders (cervical/lumbar spine pain, myofascial pain, tension headache, muscle spasm associated with arthritis) evaluated Flupirtine 100 mg (2-3 doses/d) max dose 600 mg/d Assessment on pain scale: 0 = no pain to 4 = very severe pain G.Mueller-Schwefe. Progress of Medicine 121 Jg.- Original No.1/2003, Pg.11-18 A true commitment is a heart felt promise to yourself from which you will not back down - D. Mcnally
  • 60. 60 Efficacy in Musculo-Skeletal Disorders % patients with response (improvement by at % patients with response (improvement by at % patients with continuous pain at beginning % patients with continuous pain at beginning least 1 step) at end of 1 wk least 1 step) at end of 1 wk and end of 4 wks Rx and end of 4 wks Rx G.Mueller-Schwefe. Progress of Medicine 121 Jg.- Original No.1/2003, Pg.11-18 Serious, sincere, systematic studies, surely secure supreme success
  • 61. 61 Efficacy in Musculo-Skeletal Disorders % patients with response (improvement by at least 1 % patients with response (improvement by at least 1 % patients with response (improvement by at least 1 % patients with response (improvement by at least 1 step): reduction of muscle spasm step): reduction of muscle spasm step): restriction of daily activities step): restriction of daily activities G.Mueller-Schwefe. Progress of Medicine 121 Jg.- Original No.1/2003, Pg.11-18 God is a comedian performing before an audience that is afraid to laugh
  • 62. 62 Clinical experience in migraine 47 pts with migraine evaluated Flupirtine (n = 24) 100 mg (up to 4 doses/d x 5 d) Paracetamol (n = 23) 1 gm (up to 4 doses/d x 5 d) 60 % patients unable to work 20 % patients confined to bed 50 PAR PAR 40 % pts % pts 10 30 FLU 20 10 FLU 0 0 1 2 3 4 5 1 2 3 4 5 Million R, et al. Current Medical Research and Opinion, 1984; vol 9 (no 3): 204-212
  • 63. 63 Clinical experience in migraine Mean VAS scores of pain severity during migraine attack 70 60 50 40 Score 30 PAR 20 FLU 10 0 Time (d) 1 2 3 4 5 Million R, et al. Current Medical Research and Opinion, 1984; vol 9 (no 3): 204-212
  • 64. 64 Clinical experience in migraine Million R, et al. Current Medical Research and Opinion, 1984; vol 9 (no 3): 204-212 Man is made by his beliefs; as he beliefs, so he is
  • 65. 65 10 patients with tumor/chemoRx/radioRx-related neuropathic pain not controlled with opioid drugs Flupirtine 100 mg x 4 times/d x 8 d (max dose 300 mg x 4 times/d) Opioid Rx was continued during trial Assessment of pain relief by Wisconsin Brief Pain Questionnaire (0 = no pain to 10 = worst pain) * * * Patient # 1 and 10 could not understand the questionnaire and hence values are not available
  • 66. 66 The word shall perish not for lack of wonders but lack of wonder
  • 67. 67 71 patients with cancer-related pain not controlled with opioid drugs Flupirtine 100 mg x 4 times/d x 4 wks (max dose 100 mg x 6 times/d); n = 35 Tramadol 50 mg x 4 times/d x 4wks (max dose 50 mg x 6 times/d); n = 36 Assessment of pain relief by scale (1 = pain free to 5 = severe pain) Pain Intensity Differences after 4 wks Pain Intensity Differences after 4 wks No Pre-Rx Successful Pre-Rx Not successful Pre-Rx All patients In any field, find the strangest thing and explore it
  • 68. 68 % pts with pain alleviation after 4 wks % pts with pain alleviation after 4 wks 54 % 36 % There are sixty trillion cells in the human body
  • 69. 69 Presentation Points “Men of Genius Admired: Men of Wealth envied women of power feared but only women of character are trusted” A- Friedman
  • 70. 70 Summary  Flupirtine is a centrally acting,non-opioid analgesic that exhibits additionally muscle relaxing activity  Has been used in Europe for 20 years in treatment of pain states such as post-Sx, arthritis, and muscular pain syndromes  Flupirtine has been found in clinical trials to be safe and well tolerated 1,2,3,4  Free of the opioid-related respiratory depression, dependence potential, and constipation4,5  Devoid of cardiac effects in humans during prolonged exposure5  Useful adddition alone and in combination with NSAIDs to control pain 1 Scheef W. Analgesic efficacy and safety of oral flupirtine in the treatment of cancer pain. J Postgrad Med 1987;63(suppl 3):67– 70 2 Galasko CS, et al. Trial of oral flupirtine maleate in the treatment of pain after orthopaedic surgery. Curr Med Res Opin 1985;9(9):594–601 3 Heusinger JH. Efficacy and tolerance of flupirtine and pentazocine in 2 multicentre trials. J Postgrad Med 1987;63(suppl 3):71–9 4 Riethmuller-Winzen H. Flupirtine in the treatment of post-operative pain. Postgrad Med J 1987; 63(suppl 3):61–5 5 Scheef W, Wolf-Gruber D. [Flupirtine in patients with cancer pain]. Arzneimittelforschung 1985; 35(1):75–7
  • 71.
  • 72. Dedicated to my family for making everything worthwhile
  • 73. READ not to contradict or confute Nor to Believe and Take for Granted but TO WEIGH AND CONSIDER THANK YOU My sincere thanks to SUN-SOLARIS

Hinweis der Redaktion

  1. NMDA receptor is one of the main mediators of excitatory neurotransmission. The binding of both glutamate and glycine activates this receptor. The receptor is a ligand gated ion channel, which permits the movement of calcium, sodium and potassium across the post-synaptic membrane
  2. NMDA receptor is one of the main mediators of excitatory neurotransmission. The binding of both glutamate and glycine activates this receptor. The receptor is a ligand gated ion channel, which permits the movement of calcium, sodium and potassium across the post-synaptic membrane
  3. NMDA receptor is one of the main mediators of excitatory neurotransmission. The binding of both glutamate and glycine activates this receptor. The receptor is a ligand gated ion channel, which permits the movement of calcium, sodium and potassium across the post-synaptic membrane
  4. NMDA receptor is one of the main mediators of excitatory neurotransmission. The binding of both glutamate and glycine activates this receptor. The receptor is a ligand gated ion channel, which permits the movement of calcium, sodium and potassium across the post-synaptic membrane
  5. NMDA receptor is one of the main mediators of excitatory neurotransmission. The binding of both glutamate and glycine activates this receptor. The receptor is a ligand gated ion channel, which permits the movement of calcium, sodium and potassium across the post-synaptic membrane
  6. NMDA receptor is one of the main mediators of excitatory neurotransmission. The binding of both glutamate and glycine activates this receptor. The receptor is a ligand gated ion channel, which permits the movement of calcium, sodium and potassium across the post-synaptic membrane
  7. PPID = peak pain intensity difference SPID = sum of pain intensity difference
  8. NRS numerical rating scale
  9. NRS numerical rating scale
  10. NRS numerical rating scale