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8/11/2019 NSAID, dr. Siti S.
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Siti Suparti
Depart. Of. Pharmacology & TherapyFaculty Of MedicinePadjadjaran University
NON STEROID ANTIINFLAMMATORY DRUGS& DRUGS USE IN THE TREATMENT OF GOUT
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What is NSAID ?
The antiinflamatory, analgesic, antipyretic
drugs are heterogenous group of
compounds, often chemically unrelated(most of them are organic acids), which
nevertheless share certain therapeutic
actions and side effects The prototype is aspirin, named: Aspirin
like drugs or NSAIDs
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Chemical classification of
NSAIDs Salicylic acid dervatives
Para-aminophenol derivatives
Indole and Indene acetic acids
Heteroaryl acetic acids
Anthranilic acids (fenamates) Enolic acids
Alkanones
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Therapeutic Activities
Analgesic - against pain of low to moderate
intensity
Chronic post operative pain or pain arising
from inflammation => (+)
Pain arising from the hollow viscera => (-)
Antipyretics - reduce the body temperature
in febrile states
Anti inflammatory agents - musculosceletal
disorder
Treatment of primary dysmenorrhea
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Side Effects
Induce gastric or intestinal ulceration - erosions,ulcers
GI side effects
Disturbances in platelet function
Prolongation of gestation
spontaneous labor
Changes in renal function
Prolongation of bleeding time Intolerance => to Aspirin = to all NSAIDs
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Choice of NSAIDs in varying
clinical situationThe choice among NSAIDs for the tretment of
arthritides is largely empirical.
Choice of the drug, given for a week or more.
If the drug is effective => treament should be
continued.
Mild arthropaties => together with rest andphysical therapy.
For children: aspirin, naproxen, tolmetin.
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Precaution when patients given salicylates or
phenylbutazone together with warfarin,sulfonylurea, hypoglycemic agents, methotrexate.
If patients can not tolerate NSAIDs => choice the
other form of therapy.Gold, hydrochloroquine, penicillamine,
imunosuppressive agents and glucocorticoids are
another choice.
The selection of an NSAIDs for patient accordingto cost of therapy, Aspirin is very inexpensive.
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SALICYLATE
Pharmacological Properties
Effects: analgesia, antipyretic, on CNS,
respiration, acid base balance and
electrolyte pattern, CV, GI, hepatic and
renal, uricosuric, the blood, on rheumatic,
inflammatory and immunological process,
on connective tissue metabolism, on CH, N,fat metabolism, on endocrine, salicylate and
pregnancy, local irritant effects.
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Absorbtion: orally - absorbed rapidly
rectal - absorped slower than
orally.Distribution: salicylates is distributed
throughout most body tissues and
most trancellular fluids.Biotransformation: in many tissues,
particularly in the hepatic
endoplasmic reticulum and
mitochondria.
Excretion: renal (GF and proximal tubular
secretion)
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THERAPEUTIC USE
Systemic uses: antipyresis, analgesia,
rheumatoid arthritis.
Other uses: in the treatment or prophylaxis
of diseases associated with
hyperaggregability.
Local uses; per rectal, local on skin.
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TOXIC EFFECT OF SALICYLATES
=> May be fatal
Salicylate intoxication: 10 - 30 g (adult)
4,7 mg methyl salicylate
in children.
Simptoms and Signs (SALICYLISM)
Disturbances in acid balance
CNS disturbances
Fever
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Dehydration
GI symptoms
Acidosis
Toxic encephalopathy.
In adult - toxic effects occured by therapeuticdose:
Non cardiogenic pulmonary edem
Non focal neurologic abnormalities Acid base abnormalities (ketosis)
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Aspirin Hypersensitivity
Vasomotor rhinitis
Angioedema
Generalized urticaria
Bronchial asthma
Hypotension Shock.
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PARAAMINOPHENOL
DERIVATIES ACETAMMINOPHEN
An effective alternative to aspirin
Available without prescription Acute overdosage causes fatal hepatic
damage
( hepetotoxicity )For Analgesicantipyretic uses, a weak
antiinflammatory activity.
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INDOMETHACIN
Congener of indomethacin : Sulindac
Used in rheumatoid arthritis and related
disorder as antiinflamatory drugs, includingacute gout.
Toxicity often limit its use
There is entherohepatic cycling of theconjugate and probably indomethacin usedas an antipyretic in Hodgkins disease.
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Toxic effect of indomethacin
- Most adverse effect are close dependent : GIT complaints
Occult blood loss
Acute pancreatitis Hepatic abnormalities
Severe frontal headache ( CNS effect )
Hemopoietic reaction Hypersensitivity
- Contraindication : renal disease, ulcus in
GIT
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MEFENAMIC ACID
Have antiimflammatory, analgesic andantipyretic properties
Inhibit cyclooxygenase
Meclofenamic acid may antagonize certaineffect of prostaglandis
Pharmacokinetic properties :
Meclofenamate reaches the peak concentrationfaster than mefenamic acid
50 % of mefenamic acid excreted in urine 20% is recovered in the feces
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Toxic Effect and Precautions GIT disorder
Hemolytic anemia of an autoimmune
type
Contraindicated on patients with a
history of gastrointestinal diseases
Diarrhea or skin rash : drug should be
stopped.
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NAPROXEN
Fully absorbed. Influenced by food
Accelerated by sod.bicarbonate and reduce byMg oxide or Aluminium hydroxide.
Crosses the placenta , 1 % of the materialplasma concentration appears in milk oflactating mother
GIT effect and CNS effect Ototoxicity
Dermatological Problems
Other effect
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PIROXICAM
Has antiinflammatory, analgesic andantipyretic activity
For long term treatment of RA or OAequivalent of aspirin indomethacin ornaproxen, be tolerated better
T 1/ 2 is longsingle daily dose
For the treatment of AS, acutemusculoskeletal disorders, dysmenorrhea,postop.pain and acute gout
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PHENYLBUTAZONE
For the treatment of RA etc.
In long term therapyserious toxicity
Can cause agranulocytosis Sulfinpyrazone much more effective
uricosuric agentfor chronic gout
Can cause edema
Death especially caused aplastic anemia andagranulositosis
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Do not give drug more than 7 days.
Contraindicated in patient with
hypertension, cardiac, renal or hepatic
dysfuncion, a history of peptic ulcer, blood
dyscrasia, or hypersensitivity to the drug
Not advisable for elderly persons and not
recommended in children under the age of
14
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GOLD
Can supress or prevent, but not cure
experimental arthritis and synovitis due to a
number of infectious and chemical agents The best hypothesis related to the capacity
of gold compounds to inhibit maturation
and function of mononuclear phagocytesand of Tcellsupressing immune
responsiviness
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Aurothioglucose and gold sodium thiomalate :Parenteral and oral
Interaction with dimercaprol, penicillamine
and Nacethylcystein
increase theexretion of gold
Auranofin :
Per oral, par enteralPredominantly exccreated in the feces.
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Contraindication
Renal disease, hepatic dysfunction, a historyof infectious hapatitis, hematologicaldisorders.
Pregnancy, breast feeding Concomitant use of antimalarials,
immunosupressants, phenylbutazone,
oxyphenbutazone Urticaria, eczema, colitis
Poorly tolerated by elderly persons
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Allopurinol
Effective for the treatment of :
Primary hyperuricemia of gout
Secondary to hematological disorders
Antineoplastic therapy
Inhibit the terminal step in uric acid
biosyntesis Well tolerated by most patients