Pharmacology

  • Mechanism of Action: Cefoperazone is a beta-lactam antibiotic that works by inhibiting bacterial cell wall synthesis, leading to cell death. It binds to specific penicillin-binding proteins (PBPs) located on the bacterial cell membrane, thereby disrupting the formation of peptidoglycan, which is essential for bacterial cell wall integrity.

  • Spectrum of Activity: Cefoperazone is effective against a wide range of Gram-positive and Gram-negative bacteria, including Pseudomonas aeruginosa, Escherichia coli, and Klebsiella species. It is resistant to many beta-lactamases produced by resistant bacteria.

Indication

  • Cefoperazone sodium is primarily indicated for the treatment of various bacterial infections, including:

    • Respiratory Tract Infections (e.g., pneumonia, bronchitis)

    • Urinary Tract Infections (e.g., cystitis, pyelonephritis)

    • Skin and Soft Tissue Infections

    • Intra-abdominal Infections (e.g., peritonitis, abscesses)

    • Meningitis caused by susceptible organisms

    • Bacteremia and septicemia

    • Post-surgical infections

    • Gynaecological infections (e.g., pelvic inflammatory disease)

    • Bone and joint infections

Dosage & Administration

  • Route of Administration: Cefoperazone is administered intravenously (IV) or intramuscularly (IM).

  • Dosage for Adults:

    • For severe infections: 1–2 grams every 12 hours.

    • For less severe infections: 1–2 grams once daily or every 12 hours.

    • Infections caused by Pseudomonas or other resistant organisms may require higher doses (e.g., 4 grams per day).

  • Pediatric Dosage: Dosage for children is adjusted based on weight and severity of the infection.

    • For neonates and infants, doses generally range from 20 to 50 mg/kg/day, depending on the infection severity.

  • Duration: Treatment duration depends on the type and severity of infection (usually 7-14 days).

Interactions

  • Probenecid: Can increase the half-life and serum concentration of cefoperazone by inhibiting its renal excretion.

  • Aminoglycosides: Concurrent use with aminoglycoside antibiotics may increase the risk of nephrotoxicity.

  • Warfarin: Cefoperazone can enhance the anticoagulant effect of warfarin, leading to an increased risk of bleeding.

  • Other antibiotics: Combination with other antibiotics should be done cautiously, as it may result in antagonistic effects.

Contraindications

  • Hypersensitivity to cefoperazone or other cephalosporins, penicillins, or beta-lactam antibiotics.

  • Severe renal or hepatic impairment (with dose adjustment necessary in renal impairment).

  • Neonates: Not recommended for neonates with hyperbilirubinemia due to the risk of kernicterus.

  • Pregnancy: Category B (use with caution in pregnant women, especially during the first trimester).

Side Effects

  • Common Side Effects:

    • Diarrhea

    • Nausea and vomiting

    • Rash

    • Pain at the injection site

  • Serious Side Effects:

    • Allergic reactions (e.g., anaphylaxis)

    • Hematologic effects (e.g., thrombocytopenia, leukopenia)

    • Hepatotoxicity (elevated liver enzymes, jaundice)

    • Renal toxicity (especially with prolonged use or in patients with pre-existing renal dysfunction)

    • Superinfection (e.g., Clostridium difficile-associated diarrhea)

Pregnancy & Lactation

  • Pregnancy: Cefoperazone is classified as Pregnancy Category B. Animal studies have not shown evidence of harm to the fetus, but controlled human studies are lacking. Use only if clearly needed.

  • Lactation: Cefoperazone is excreted in breast milk in small amounts. Caution is advised when administering to breastfeeding mothers, especially if the infant is preterm or has underlying health issues.

Precautions & Warnings

  • Allergic Reactions: History of hypersensitivity to cephalosporins or penicillins may increase the risk of cross-reactivity. Use cautiously in patients with a history of allergies.

  • Hepatic Dysfunction: Regular monitoring of liver function is recommended in patients with hepatic impairment.

  • Renal Dysfunction: In patients with severe renal impairment, dose adjustment is required.

  • Clostridium difficile-associated diarrhea (CDAD): Antibiotics can alter gut flora and lead to overgrowth of C. difficile, causing severe diarrhea.

Overdose Effects

  • Overdose symptoms may include:

    • Gastrointestinal symptoms (e.g., nausea, vomiting, diarrhea)

    • Severe renal toxicity (e.g., oliguria, anuria)

    • CNS effects (e.g., confusion, seizure, agitation)

  • Management: If overdose occurs, discontinue the medication immediately. Supportive treatment and symptomatic management should be provided. Hemodialysis may be considered in severe cases to remove the drug.

Therapeutic Class

  • Antibiotic: Cefoperazone sodium is classified as a third-generation cephalosporin antibiotic.

Storage Conditions

  • Store cefoperazone sodium at room temperature (15°C to 30°C) away from moisture and light.

  • After reconstitution, the solution should be used immediately or stored in the refrigerator for up to 24 hours. Do not freeze.

Chemical Structure

Cefoperazone sodium has a beta-lactam ring structure typical of cephalosporins. Its molecular formula is C18H18N8Na2O7S3. It contains a sulfur atom, a beta-lactam ring, and a side chain that helps determine its antibacterial spectrum.

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