Novocalmin (Metamizole Sodium)

Novocalmin, a pyrazolone analgesic, is indicated for several pain‑related and febrile conditions.

• Mild to moderate pain: provides effective relief when other non‑opioid analgesics are insufficient.
• Post‑operative pain: helps control discomfort after surgical procedures.
• Colic and visceral pain: alleviates cramping and internal organ pain.
• Fever: reduces elevated body temperature associated with infection or inflammation.

• Metamizole Sodium is metabolized to active pyrazolone derivatives that inhibit cyclooxygenase enzymes, decreasing prostaglandin synthesis. It also modulates central pain pathways in the spinal cord and brain, resulting in analgesic and antipyretic effects without significant anti‑inflammatory activity.

Novocalmin may cause a range of adverse reactions, most of which are dose‑related and reversible.

Common Side Effects

• Nausea: mild to moderate stomach upset.
• Vomiting: occasional emesis.
• Dizziness: transient light‑headedness.
• Hypotension: mild blood pressure reduction.
• Rash: skin erythema or pruritus.
• Mild leukopenia: slight decrease in white blood cells.

Serious or Rare Side Effects

• Agranulocytosis: severe drop in neutrophils, potentially life‑threatening.
• Stevens‑Johnson syndrome: severe skin and mucous membrane reaction.
• Anaphylaxis: acute allergic response requiring emergency care.
• Hepatic failure: rare liver injury.
• Renal impairment: reduced kidney function.
• Blood dyscrasias: abnormal blood cell counts.

Before initiating therapy with Novocalmin, clinicians should consider several safety measures.

• Baseline blood count: assess leukocyte levels to detect pre‑existing cytopenia.
• Monitor infection signs: watch for fever or sore throat indicating possible agranulocytosis.
• Hepatic/renal function: adjust use in patients with liver or kidney disease.
• Hypersensitivity: avoid in individuals with known allergy to pyrazolones.
• Elderly patients: use cautiously due to increased sensitivity to hypotension.
• Store at ambient temperature: keep in the original pack, protect from moisture.

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

Major Interactions (Avoid)

• Other myelotoxic agents: increase risk of severe blood cell suppression.
• Anticoagulants: may enhance bleeding tendency.
• Concurrent NSAIDs: elevate gastrointestinal ulcer risk.
• Drugs causing agranulocytosis (e.g., carbamazepine): additive risk of severe neutropenia.

Moderate Interactions (Monitor Closely)

• CYP450 inhibitors/inducers: may affect metabolite levels.
• Diuretics: potential additive hypotensive effect.
• Antihypertensives: monitor blood pressure for excessive drop.