Meperya (Meropenem Anhydrous)

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

• Complicated intra‑abdominal infections: achieves bacterial eradication leading to clinical cure.
• Hospital‑acquired pneumonia: provides rapid bactericidal activity for respiratory pathogens.
• Complicated urinary tract infections: clears infection and restores urinary function.
• Severe sepsis and septic shock: reduces microbial load to support hemodynamic recovery.

• 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, causing osmotic lysis and rapid bactericidal activity against a wide range of Gram‑positive and Gram‑negative organisms, including many resistant strains.

Common Side Effects

• Nausea: mild to moderate gastrointestinal upset.
• Diarrhea: may be watery and self‑limiting.
• Headache: transient and usually resolves.
• Infusion site reactions: redness or pain at the injection site.
• Elevated liver enzymes: transient increase in transaminases.
• Rash: mild skin erythema.

Serious or Rare Side Effects

• Seizures: especially in patients with CNS disorders or renal impairment.
• Anaphylaxis: severe allergic reaction requiring immediate medical attention.
• Clostridioides difficile infection: possible colitis after broad‑spectrum therapy.
• Thrombophlebitis: inflammation of veins at infusion sites.
• Renal impairment: worsening kidney function in susceptible individuals.
• Neutropenia: reduced white blood cell count, increasing infection risk.

Before initiating therapy, consider the following precautions:

• Renal function: adjust dose in patients with impaired renal clearance.
• Seizure risk: monitor closely in individuals with a history of seizures or CNS disorders.
• Allergy: avoid in patients with known hypersensitivity to carbapenems or β‑lactam antibiotics.
• Pregnancy: use only if the potential benefit justifies the potential risk to the fetus.
• Drug interactions: review concomitant medications for possible interactions.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Meropenem may interact with several co‑administered drugs.

Major Interactions (Avoid)

• Valproic acid: may reduce valproate levels, increasing seizure risk.
• Aminoglycosides: additive nephrotoxicity may occur.
• Loop diuretics: potential for enhanced ototoxicity.

Moderate Interactions (Monitor Closely)

• Probenecid: can increase meropenem plasma concentrations.
• Warfarin: may potentiate anticoagulant effect, requiring INR monitoring.
• Oral contraceptives: may experience reduced efficacy, consider alternative contraception.