Generic Name: MEROPENEM

Brand Name: PLEMONEM 500

Therapeutic Classification: Carbapenem antibacterial (β-lactam antibiotic)

Strength & Dosage Form: 500 mg powder for injection (IV/IM)

Indications (PNDF):

For the treatment of moderate to severe infections caused by susceptible microorganisms, including:

  • Intra-abdominal infections
  • Meningitis (bacterial)
  • Pneumonia (community-acquired and hospital-acquired)
  • Urinary tract infections (complicated)
  • Skin and soft tissue infections
  • Gynecologic infections
  • Septicemia and bacteremia
  • Febrile neutropenia (empiric therapy)

Dosage and Administration:

Adults:

  • Usual dose: 500 mg IV every 8 hours
  • Severe infections (e.g., pneumonia, sepsis, meningitis): 1 g IV every 8 hours
  • Meningitis: 2 g IV every 8 hours (as per physician order)
  • Renal impairment (CrCl < 51 mL/min): Adjust dose according to renal function

Children (≥3 months):

  • 10–40 mg/kg IV every 8 hours, depending on infection severity (max 2 g per dose)

Neonates (<3 months):

  • 20 mg/kg IV every 8–12 hours

Reconstitution & Administration:

  • For IV bolus: Reconstitute each vial (500 mg or 1 g) with 10 mL sterile water for injection
    • Administer slowly over 3–5 minutes
  • For IV infusion: Reconstitute with 10 mL sterile water, then further dilute in 50–200 mL compatible IV fluid (0.9% NaCl or 5% Dextrose)
    • Infuse over 15–30 minutes
  • Do not mix with other drugs in the same syringe or infusion line
  • Use immediately after reconstitution; discard unused portion

Contraindications:

  • Hypersensitivity to carbapenems, penicillins, or other β-lactam antibiotics

Precautions:

  • Use with caution in patients with renal impairment and history of seizures or CNS disorders
  • Prolonged use may result in superinfection (e.g., C. difficile–associated diarrhea)
  • Adjust dose in elderly and renally impaired patients
  • Monitor renal, hepatic, and hematologic functions during prolonged therapy

Adverse Reactions:

  • Nausea, vomiting, diarrhea
  • Rash, pruritus
  • Headache
  • Elevated liver enzymes
  • Thrombophlebitis at injection site
  • Rare: Seizures (especially in renal impairment), hypersensitivity reactions, C. difficile colitis

Pregnancy Category (PNDF):

Category B – Animal studies show no risk; use only if clearly indicated.

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