Nimesil (Nimesulide)

Nimesulide is an NSAID that reduces inflammation by inhibiting cyclo‑oxygenase enzymes.

• Mild to moderate pain: provides analgesic relief in conditions such as headache, dental pain or musculoskeletal discomfort.
• Fever: lowers elevated body temperature associated with infections or inflammatory states.
• Osteoarthritis: decreases joint pain and improves functional mobility.
• Rheumatoid arthritis: helps control inflammatory joint pain and swelling.
• Dysmenorrhea: alleviates menstrual cramps and associated discomfort.

• Nimesulide selectively inhibits the cyclo‑oxygenase‑2 (COX‑2) enzyme, which is responsible for converting arachidonic acid to prostaglandins that mediate pain, fever and inflammation. By sparing COX‑1 activity, it aims to preserve gastric mucosal protection while reducing the synthesis of pro‑inflammatory prostaglandins, resulting in analgesic and antipyretic effects. The inhibition is reversible and dose‑dependent, leading to a rapid onset of symptom control.

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: transient sensation of light‑headedness.
• Skin rash: mild erythema or pruritus.

Serious or Rare Side Effects

• Liver injury: elevated transaminases or hepatitis, requiring monitoring.
• Severe skin reactions: Stevens‑Johnson syndrome or toxic epidermal necrolysis.
• Renal impairment: acute kidney injury or reduced function.
• Cardiovascular events: increased risk of hypertension or thrombotic events.

Before prescribing Nimesulide, clinicians should consider several safety precautions.

• Indication limitation: use only for short‑term treatment of mild to moderate pain, fever or inflammatory conditions.
• Liver monitoring: avoid in patients with existing hepatic disease and check liver function periodically.
• Renal caution: adjust use in patients with impaired kidney function.
• Gastro‑intestinal risk: avoid in individuals with a history of ulcer disease or gastrointestinal bleeding.
• Drug interactions: review concomitant medications that affect hepatic metabolism.
• Store at ambient temperature: keep below 25 °C, in the original packaging, protected from moisture and light.

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

Major Interactions (Avoid)

• Concurrent use with other NSAIDs or COX‑2 inhibitors: increased risk of gastrointestinal bleeding and renal toxicity.
• Anticoagulants (e.g., warfarin): heightened bleeding tendency.
• Hepatotoxic drugs (e.g., isoniazid, methotrexate): potential for severe liver injury.

Moderate Interactions (Monitor Closely)

• CYP2C9 substrates (e.g., phenytoin, sulfonylureas): may increase plasma levels.
• Diuretics or ACE inhibitors: possible reduction in renal function.
• Lithium: risk of increased serum lithium concentrations.