Nimesulide Almus (Nimesulide)

Nimesulide is an NSAID that reduces inflammation and pain by inhibiting cyclo‑oxygenase‑2 mediated pathways.

• Acute pain: provides rapid relief of moderate to severe pain episodes.
• Dysmenorrhea: alleviates menstrual cramps and associated discomfort.
• Osteoarthritis: decreases joint inflammation and improves functional mobility.
• Low back pain: reduces lumbar discomfort and enhances daily activity tolerance.
• Fever: lowers elevated body temperature in febrile conditions.

• Nimesulide selectively inhibits the cyclo‑oxygenase‑2 (COX‑2) enzyme, which catalyzes the conversion of arachidonic acid to prostaglandins involved in inflammation, pain and fever. By sparing COX‑1 activity, it preserves protective gastric prostaglandins while decreasing the synthesis of pro‑inflammatory prostaglandins, resulting in analgesic, antipyretic and anti‑inflammatory effects. The drug reaches peak plasma concentrations within 1–2 hours and is extensively bound to plasma proteins, with hepatic metabolism primarily via CYP2C9.

Nimesulide may cause a range of adverse reactions, varying from mild to severe.

Common Side Effects

• Gastrointestinal discomfort: nausea, dyspepsia or abdominal pain.
• Headache: mild to moderate intensity.
• Dizziness or vertigo.
• Skin rash: mild erythema or itching.

Serious or Rare Side Effects

• Hepatotoxicity: elevated liver enzymes or severe liver injury.
• Severe skin reactions: Stevens‑Johnson syndrome or toxic epidermal necrolysis.
• Renal impairment: acute kidney injury or reduced renal function.
• Anaphylactic reaction: sudden onset of airway swelling, hypotension or urticaria.

Before prescribing Nimesulide, clinicians should evaluate several safety considerations.

• Assess liver function: monitor transaminases before and during therapy.
• Evaluate gastrointestinal risk: avoid in patients with active ulcers or severe GI bleeding.
• Review cardiovascular status: use cautiously in those with uncontrolled hypertension or heart disease.
• Check concomitant medications: avoid simultaneous use with other COX‑2 inhibitors or hepatotoxic drugs.
• Store at ambient temperature below 25°C: keep in the original pack, protect from moisture.

Nimesulide can interact with other medicines, altering efficacy or safety.

Major Interactions (Avoid)

• Concurrent use with other COX‑2 selective NSAIDs: increased cardiovascular risk.
• Combination with anticoagulants or antiplatelet agents: heightened bleeding tendency.
• Co‑administration with hepatotoxic drugs (e.g., isoniazid, methotrexate): potential liver injury.

Moderate Interactions (Monitor Closely)

• CYP2C9 substrates (e.g., warfarin, phenytoin): may require dose adjustment.
• Diuretics (especially thiazides): possible reduction in renal clearance.