Metamizole Kalceks (Metamizole Sodium Monohydrate)

Metamizole Kalceks is used within the analgesic and antipyretic therapeutic area to manage pain and fever conditions.

• Moderate to severe pain: provides effective relief when non‑opioid analgesia is required.
• Post‑operative pain: helps control pain after surgical procedures.
• High fever: reduces elevated body temperature when antipyretic therapy is needed.
• Colic and visceral pain: alleviates painful spasms of the gastrointestinal tract.

• Metamizole sodium acts by non‑selectively inhibiting cyclooxygenase enzymes, reducing prostaglandin synthesis, which yields central analgesic and spasmolytic effects. It may also modulate endogenous opioid pathways, contributing to its pain‑relieving properties without opioid receptor activation.

Metamizole Kalceks may cause a range of adverse reactions, from mild to serious.

Common Side Effects

• Injection site pain: discomfort at the site of administration.
• Nausea: feeling of sickness or urge to vomit.
• Dizziness: light‑headed sensation.
• Hypotension: temporary drop in blood pressure.
• Skin rash: mild erythema or itching.
• Vomiting: expulsion of stomach contents.

Serious or Rare Side Effects

• Agranulocytosis: severe reduction in white blood cells.
• Anaphylaxis: life‑threatening allergic reaction.
• Severe skin reactions: such as Stevens‑Johnson syndrome.
• Hepatic dysfunction: abnormal liver enzyme elevations.
• Renal failure: impaired kidney function.
• Blood dyscrasias: abnormal blood cell counts.

Before using Metamizole Kalceks, consider the following safety measures.

• Blood count monitoring: check complete blood count regularly to detect agranulocytosis.
• Renal and hepatic function: assess kidney and liver status, especially in patients with impairment.
• Hypersensitivity: avoid use in individuals with known allergy to metamizole or pyrazolones.
• Concomitant myelosuppressants: use caution when combined with other bone‑marrow‑suppressing agents.
• Medical supervision: administer only under qualified healthcare professional guidance.
• Store at ambient temperature: keep in original packaging, protect from moisture and direct sunlight.

Metamizole Kalceks can interact with several medicines; awareness of these interactions helps minimize risk.

Major Interactions (Avoid)

• Warfarin: may enhance anticoagulant effect and increase bleeding risk.
• Other myelosuppressive agents: can compound bone‑marrow suppression.
• Immunosuppressants: may increase susceptibility to infections.
• Other NSAIDs: elevate risk of gastrointestinal and renal adverse effects.
• ACE inhibitors: potential for additive hypotensive effect.

Moderate Interactions (Monitor Closely)

• Diuretics: may intensify blood pressure lowering.
• Antihypertensives: monitor for excessive hypotension.
• Lithium: possible increase in lithium serum levels.
• Methotrexate: may raise toxicity risk.
• Oral hypoglycemics: watch for altered blood glucose control.