Meropenem Kalceks (Meropenem)

Meropenem is a carbapenem antibiotic used for serious bacterial infections across several organ systems.

• Complicated intra‑abdominal infections: provides bactericidal activity to eradicate mixed‑flora pathogens and improve recovery.
• Complicated urinary tract infections: eliminates resistant Gram‑negative organisms causing severe UTIs.
• Bacterial meningitis: penetrates the cerebrospinal fluid to treat meningitic pathogens.
• Hospital‑acquired pneumonia: covers multidrug‑resistant organisms in ventilated patients.
• Severe sepsis: offers rapid bacterial clearance in systemic infections.

• Meropenem binds 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 bactericidal activity against a broad range of Gram‑positive, Gram‑negative and anaerobic organisms.

Adverse reactions may occur with meropenem therapy and are categorized by frequency.

Common Side Effects

• Nausea: mild to moderate gastrointestinal discomfort.
• Diarrhea: may be watery and self‑limiting.
• Rash: erythematous skin eruption.
• Infusion site reactions: pain, erythema, or phlebitis at the injection site.

Serious or Rare Side Effects

• Seizures: especially in patients with renal impairment or high doses.
• Clostridioides difficile colitis: severe diarrhea due to intestinal flora disruption.
• Anaphylaxis: acute hypersensitivity reaction requiring emergency care.
• Renal toxicity: elevated creatinine or reduced urine output.
• Hepatic enzyme elevation: increased transaminases.
• Neutropenia: marked reduction in neutrophil count.

Before initiating meropenem, consider patient‑specific factors and monitor for adverse events.

• Renal function: adjust dose in patients with impaired clearance.
• History of seizures: use cautiously, as the drug may lower seizure threshold.
• Concomitant antibiotics: assess for additive toxicity, especially with other nephrotoxic agents.
• Pregnancy and lactation: evaluate risk‑benefit, as safety data are limited.
• Allergies: avoid in individuals with known carbapenem hypersensitivity.
• 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: meropenem reduces serum valproate levels, risking seizure breakthrough.
• Probenecid: decreases renal excretion of meropenem, increasing plasma concentrations.
• Other carbapenems: concurrent use may heighten neurotoxicity risk.

Moderate Interactions (Monitor Closely)

• Diuretics: monitor electrolytes and renal function for additive nephrotoxicity.
• Aminoglycosides: watch for combined ototoxic and nephrotoxic effects.
• Warfarin: observe INR values as bacterial infection changes may alter anticoagulation control.