Meropenem Kalceks (Meropenem)

Meropenem is a broad‑spectrum carbapenem antibiotic used for serious infections caused by susceptible bacteria.

• Complicated intra‑abdominal infections: achieves bacterial eradication and clinical cure in patients with perforated or postoperative abdominal infections.
• Complicated urinary tract infections: eliminates resistant Gram‑negative pathogens and resolves infection symptoms.
• Nosocomial pneumonia: treats hospital‑acquired lung infections, including ventilator‑associated pneumonia.
• Meningitis: penetrates the cerebrospinal fluid to eradicate causative organisms.
• Septicemia: provides rapid bactericidal activity in bloodstream infections.

• 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 instability and bacterial cell death. Its broad spectrum includes many Gram‑negative, Gram‑positive and anaerobic organisms, and it is resistant to most β‑lactamases.

Meropenem may be associated with a range of adverse reactions, which are categorized by frequency and severity.

Common Side Effects

• Diarrhea: mild to moderate loose stools.
• Nausea: occasional feeling of queasiness.
• Headache: transient cranial discomfort.
• Elevated liver enzymes: mild transaminase rise.

Serious or Rare Side Effects

• Seizures: especially in patients with renal impairment or CNS disorders.
• Severe allergic reactions: anaphylaxis, Stevens‑Johnson syndrome.
• Clostridioides difficile colitis: potentially life‑threatening intestinal infection.
• Thrombocytopenia: marked reduction in platelet count.
• Acute kidney injury: rapid decline in renal function.

Before initiating therapy, clinicians should evaluate patient‑specific factors and monitor for potential complications.

• Renal function: adjust dose in patients with impaired clearance.
• Hepatic function: monitor liver enzymes in patients with pre‑existing liver disease.
• Hypersensitivity: assess for known β‑lactam allergy before use.
• Seizure risk: avoid or use cautiously in patients with a history of epilepsy or CNS disorders.
• Pregnancy and lactation: weigh benefits against potential risks; use only if clearly indicated.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Meropenem can affect or be affected by other medicines; careful review of concomitant therapy is recommended.

Major Interactions (Avoid)

• Valproic acid: meropenem markedly reduces serum valproate levels, risking loss of seizure control.
• Probenecid: may increase meropenem plasma concentrations, enhancing toxicity.
• Other nephrotoxic agents (e.g., aminoglycosides): combined use can exacerbate renal impairment.

Moderate Interactions (Monitor Closely)

• Loop diuretics: may increase risk of electrolyte disturbances.
• Anticoagulants (warfarin): monitor INR as meropenem can alter coagulation parameters.
• Other broad‑spectrum antibiotics: assess for additive toxicity or antagonism.