Naofid (Nimesulide)

Nimesulide is an NSAID used to manage pain and inflammation in several clinical settings.

• Mild to moderate pain: reduces pain intensity in conditions such as headache, dental pain, or postoperative discomfort.
• Osteoarthritis: alleviates joint pain and improves functional mobility.
• Dysmenorrhea: relieves menstrual cramps and associated discomfort.

• Nimesulide selectively inhibits cyclo‑oxygenase‑2 (COX‑2), decreasing the conversion of arachidonic acid to prostaglandins that mediate pain, fever and inflammation. By sparing COX‑1 activity, it aims to preserve gastric mucosal protection while providing anti‑inflammatory and analgesic effects. The drug is rapidly absorbed after oral administration, reaches peak plasma concentrations within 1–2 hours, and is metabolized primarily in the liver to inactive metabolites that are excreted in urine.

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

Common Side Effects

• Gastrointestinal discomfort: nausea, dyspepsia, abdominal pain or loss of appetite.
• Headache: mild to moderate intensity, often transient.
• Dizziness: transient sensation of light‑headedness or vertigo.
• Skin rash: mild erythema, pruritus or localized urticaria.

Serious or Rare Side Effects

• Hepatotoxicity: significant elevation of liver enzymes, hepatitis or liver failure.
• Severe skin reactions: Stevens‑Johnson syndrome, toxic epidermal necrolysis or widespread bullous eruptions.
• Renal impairment: reduced kidney function, acute interstitial nephritis or renal failure.
• Allergic anaphylaxis: sudden swelling, bronchospasm, hypotension or shock.

When prescribing Nimesulide, clinicians should consider several precautionary measures to minimize risk.

• Indication limitation: use only for short‑term treatment of mild to moderate pain or inflammation.
• Hepatic monitoring: assess liver function before initiating therapy and periodically during use.
• Renal caution: avoid in patients with existing kidney disease or dehydration.
• Gastro‑intestinal risk: use with caution in individuals with a history of ulcers or bleeding.
• Drug interactions: review concomitant medications that may increase bleeding or affect liver enzymes.
• Pregnancy and lactation: avoid use during pregnancy and breastfeeding due to unknown safety.
• Store at ambient temperature: keep below 25°C in the original packaging, protected from moisture.

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

Major Interactions (Avoid)

• Anticoagulants (e.g., warfarin): increased risk of bleeding.
• Other NSAIDs or COX‑2 inhibitors: additive gastrointestinal toxicity.
• Hepatotoxic drugs (e.g., isoniazid, methotrexate): heightened liver injury risk.

Moderate Interactions (Monitor Closely)

• ACE inhibitors or diuretics: possible reduction in renal function.
• Lithium: increased serum lithium levels.
• Corticosteroids: enhanced risk of ulceration.
• Antihypertensives: potential attenuation of blood pressure control.