Description:

Meropenem (brand name Meronem) IV 500mg & 1g injection by Pfizer is a broad-spectrum carbapenem antibiotic used to treat serious bacterial infections caused by susceptible Gram-positive, Gram-negative, and anaerobic bacteria. It is indicated for complicated intra-abdominal infections, pneumonia (including hospital-acquired and ventilator-associated), meningitis, septicemia/bacteremia, skin and soft tissue infections, gynecological infections, febrile neutropenia, and other severe infections where broad coverage is required. It is reserved for serious infections, often in hospital settings, due to its potency and role in combating multidrug-resistant organisms. In Ghana (Accra), Meronem is a prescription injectable commonly used in hospitals and specialist clinics for severe infections.

Prescription:

Prescription-only (requires a doctor’s prescription in Ghana; administered only by healthcare professionals via IV infusion or slow IV bolus in hospitals/clinics; not for self-administration or OTC dispensing due to serious infections, resistance concerns, and need for monitoring).

Therapeutic Category:

Carbapenem Antibiotic (Broad-spectrum beta-lactam antibacterial for severe infections.

Active Ingredients/Composition:

• Active ingredient: Meropenem trihydrate – equivalent to anhydrous meropenem 500 mg or 1 g per vial. Other ingredients: Sodium carbonate (anhydrous) – approximately 90 mg for 500mg vial or 180 mg for 1g vial (to form meropenem sodium during reconstitution). The product is a sterile white to off-white crystalline powder in a vial, reconstituted with sterile water for injection or compatible IV fluid to produce a clear solution.

Vitamins: None.

Minerals: None (trace sodium from sodium carbonate, but not therapeutic).

Variant:

• Meronem IV 500mg powder for solution (vial).
• Meronem IV 1g powder for solution (vial). Common pack sizes: 10 vials per pack (for 500mg and 1g separately). The 500mg is used for moderate infections or children; 1g for severe adult infections.

Consume Type:

Injectable – Intravenous (IV) infusion (preferred method) or slow IV bolus (over 3–5 minutes). Administered only by healthcare professionals in clinical settings.

Directions/Usage: Administered only by trained healthcare personnel.

• Adults: Typical dose 500 mg to 1 g IV every 8 hours (or 2 g every 8 hours for meningitis); duration 7–14 days depending on infection and response.
• Children: Weight-based (10–40 mg/kg every 8 hours; max 2 g/dose).
• Reconstitution: Add 10 ml sterile water for injection to 500mg vial or 20 ml to 1g vial; shake to dissolve.
• IV infusion: Further dilute in compatible fluid (e.g., 50–200 ml 0.9% sodium chloride or 5% dextrose) and infuse over 15–30 minutes.
• Slow IV bolus: Inject over 3–5 minutes if no infusion fluid available.
• Renal impairment: Reduce dose/frequency (e.g., half dose if CrCl 10–50 mL/min).
• Complete full course even if symptoms improve.

Common Side Effects: Common:

• Gastrointestinal: Nausea, vomiting, diarrhoea, abdominal pain.
• Rash, pruritus (itching).
• Headache
• Injection site reactions (pain, phlebitis). Rare/serious (seek immediate help): Seizures (especially in renal impairment or high doses), severe allergic reactions (anaphylaxis), Clostridium difficile-associated diarrhoea, liver enzyme elevation, thrombocytopenia, or Stevens-Johnson syndrome.

Package Type:

Glass vials of powder (500mg or 1g per vial; often in packs of 10 vials; labelled carton with reconstitution instructions and warnings).

Storage Advice: Store unopened vials at room temperature (below 25–30°C) in original packaging, protected from light. Do not freeze. Reconstituted solution: Use immediately or store refrigerated (2–8°C) for up to 24 hours (check label). Diluted infusion: Use within 4–8 hours at room temperature or 24 hours refrigerated.

Safety Advice:

• Administered only under medical supervision (risk of seizures, anaphylaxis, and superinfections).
• Contraindicated in hypersensitivity to meropenem, other carbapenems, or beta-lactams.
• Caution in history of seizures, renal impairment (dose adjustment required), or central nervous system disorders.
• Monitor for superinfections (e.g., C. difficile diarrhoea).
• If rash, fever, seizures, or severe diarrhoea occur, stop use and seek medical care.
• Keep out of reach of children (overdose risk).

Product Substitutes: Similar meropenem injections in Ghana include:

• Meronem (original Pfizer brand, same product).
• Generic meropenem 500mg or 1g injection (various importers).
• Other brands like Merocrit, Meronem, Merolex (Luex), or local generics. Alternatives: Imipenem/cilastatin, ertapenem, doripenem, or piperacillin/tazobactam for serious infections. Consult doctor/pharmacist in Accra (e.g., hospital pharmacy) for availability.

Manufacturer/Marketer:

Pfizer Inc. (original brand holder for Meronem). Marketed/distributed in Ghana by Pfizer regional affiliates (Pfizer Ghana) or local importers/pharmacies (widely stocked in hospital pharmacies).

Country of Origin:

Varies by batch/market (original Meronem often manufactured in Ireland, UK, or other Pfizer facilities; generics from India commonly imported to Ghana).