Meropenem Kalceks (Meropenem)

Meropenem is a broad‑spectrum carbapenem antibiotic used for serious bacterial infections.

• Complicated intra‑abdominal infections: achieves clinical cure and microbiological eradication.
• Complicated urinary tract infections: eliminates resistant uropathogens and resolves infection.
• Bacterial meningitis: penetrates the cerebrospinal fluid to treat meningitic pathogens.
• Sepsis: provides rapid bactericidal activity in systemic infection.
• Hospital‑acquired pneumonia: covers multidrug‑resistant Gram‑negative and Gram‑positive organisms.

• Meropenem binds with high affinity to penicillin‑binding proteins (PBPs) on bacterial cell walls, inhibiting the final transpeptidation step of peptidoglycan synthesis. This disruption weakens the cell wall, leading to osmotic lysis and bacterial death. Its broad spectrum includes many Gram‑negative, Gram‑positive and anaerobic organisms, and it is resistant to most β‑lactamases.

Adverse reactions may occur with meropenem therapy.

Common Side Effects

• Nausea: mild to moderate gastrointestinal upset.
• Diarrhea: may be watery and self‑limiting.
• Vomiting: occasional episodes during infusion.
• Rash: erythematous skin eruptions.
• Headache: transient cranial discomfort.
• Infusion site reactions: pain, erythema, or phlebitis.

Serious or Rare Side Effects

• Seizures: especially in patients with renal impairment or CNS disorders.
• Clostridioides difficile colitis: severe diarrhea due to dysbiosis.
• Anaphylaxis: acute hypersensitivity requiring immediate discontinuation.
• Severe neutropenia: marked reduction in white blood cells.
• Renal impairment: acute kidney injury in susceptible individuals.
• Hepatic dysfunction: elevated liver enzymes or jaundice.

Careful assessment and monitoring are required when using meropenem.

• Renal function: adjust dose in patients with impaired clearance.
• Hypersensitivity: discontinue immediately if allergic reaction occurs.
• Seizure risk: monitor patients with a history of CNS disorders.
• Superinfection: watch for overgrowth of fungi or resistant bacteria.
• Pregnancy & lactation: use only when benefit outweighs potential risk.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Meropenem may interact with other medicines, affecting efficacy or safety.

Major Interactions (Avoid)

• Valproic acid: reduces plasma levels, increasing seizure risk.
• Probenecid: decreases renal excretion, raising meropenem concentrations.
• Cytotoxic chemotherapy: additive nephrotoxicity may occur.

Moderate Interactions (Monitor Closely)

• Loop diuretics: monitor renal function and electrolytes.
• Aminoglycosides: increased risk of nephrotoxicity and ototoxicity.
• Anticoagulants (e.g., warfarin): observe INR for potential alterations.