Meropenem Arrow Lab (Meropenem Anhydrous)

Meropenem is a broad‑spectrum carbapenem used for severe bacterial infections in the hospital setting.

• Complicated intra‑abdominal infections: provides bactericidal activity against mixed flora causing intra‑abdominal sepsis.
• Complicated urinary tract infections: eradicates resistant Gram‑negative and Gram‑positive pathogens in the urinary tract.
• Hospital‑acquired pneumonia: treats pneumonia caused by multidrug‑resistant organisms acquired in healthcare settings.
• Ventilator‑associated pneumonia: effective against pathogens colonizing the respiratory tract of ventilated patients.
• Meningitis: penetrates the cerebrospinal fluid to treat bacterial meningitis.
• Severe sepsis: offers rapid bacterial clearance in systemic infection.

• 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 lysis, resulting in a bactericidal effect against a wide range of Gram‑positive, Gram‑negative, and anaerobic organisms.

Adverse reactions may occur with meropenem therapy and should be monitored.

Common Side Effects

• Diarrhea: mild to moderate gastrointestinal upset.
• Nausea: occasional feeling of queasiness.
• Headache: transient cranial discomfort.
• Rash: mild skin erythema or pruritus.
• Elevated liver enzymes: transient increase in hepatic transaminases.
• Phlebitis at infusion site: irritation of peripheral veins.

Serious or Rare Side Effects

• Anaphylaxis: severe, potentially life‑threatening allergic reaction.
• Seizures: especially in patients with renal impairment or CNS disease.
• Clostridioides difficile colitis: severe colonic infection.
• Hemolytic anemia: rare immune‑mediated red cell destruction.
• Renal toxicity: acute kidney injury in susceptible individuals.
• Stevens‑Johnson syndrome: severe mucocutaneous reaction.

Meropenem should be used with caution and under professional supervision.

• Renal function: adjust dose in patients with impaired kidney function.
• Seizure risk: monitor neurologic status, especially in patients with CNS disorders.
• Allergies: avoid in individuals with known carbapenem or beta‑lactam hypersensitivity.
• Pregnancy and lactation: use only if benefit outweighs potential risk.
• Drug interactions: review concomitant medications for potential interactions.
• Storage: Store at ambient temperature: keep in original container, protect from moisture and light.

Meropenem may interact with other medicines; awareness of interaction severity is essential.

Major Interactions (Avoid)

• Valproic acid: may reduce serum levels, risking seizure breakthrough.
• Probenecid: can increase meropenem concentrations, raising toxicity risk.

Moderate Interactions (Monitor Closely)

• Aminoglycosides: additive nephrotoxicity; monitor renal function.
• Loop diuretics: may enhance ototoxic potential when combined with other ototoxic agents.
• Anticoagulants: possible alteration of INR; check coagulation parameters regularly.