Tazobactum%252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520piperacillin

# Piperacillin-Tazobactam ## Overview Piperacillin-tazobactam is a combination antibiotic consisting of piperacillin, a broad-spectrum penicillin antibiotic, and tazobactam, a beta-lactamase inhibitor. It is active against many Gram-positive, Gram-negative, and anaerobic bacteria. ## Primary Indications * Complicated intra-abdominal infections * Complicated skin and skin-structure infections * Community-acquired pneumonia * Nosocomial pneumonia * Febrile neutropenia (empiric treatment) ## Adult Dosing Common adult dosages are: * 3.375 grams every 6 hours intravenously (IV) * 4.5 grams every 6 or 8 hours intravenously (IV) The choice of dose and frequency depends on the severity and type of infection. The maximum daily dose is typically 18 grams. Dosing for empiric treatment of febrile neutropenia is often 4.5 grams every 6 hours IV. ## Pediatric Dosing Dosing in pediatric patients varies by age and weight and is often weight-based. Specific recommendations depend on the indication and local institutional protocols. * For intra-abdominal infections, recommended doses range from 80 mg piperacillin/10 mg tazobactam per kg to 100 mg piperacillin/12.5 mg tazobactam per kg per dose, administered every 6 or 8 hours IV. * Maximum doses should not exceed adult dosages. ## Dose Adjustments * **Renal Impairment:** Dosage reduction is required in patients with renal insufficiency. * CrCl 20-50 mL/min: Reduce dose by 25-50% (e.g., 2.25g or 3.375g q6h). * CrCl < 20 mL/min: Reduce dose by 50% (e.g., 2.25g q6h or 3.375g q8h) and consider increasing frequency or dose after dialysis. * Hemodialysis: Administer the recommended dose at the end of dialysis and at the usual scheduled times. * **Hepatic Impairment:** No specific dose adjustment is typically recommended, but caution is advised. ## Contraindications * Hypersensitivity to piperacillin, tazobactam, other penicillins, or any component of the formulation. * History of severe allergic reaction to beta-lactams. ## Adverse Effects Common adverse effects include diarrhea, nausea, vomiting, rash, headache, insomnia, and elevated liver enzymes. Serious adverse effects include: * Hypersensitivity reactions (anaphylaxis) * Clostridioides difficile-associated diarrhea * Seizures * Hematologic abnormalities (e.g., neutropenia, thrombocytopenia) * Acute kidney injury ## Key Drug Interactions * **Probenecid:** May increase and prolong piperacillin-tazobactam plasma concentrations. * **Neuromuscular blocking agents:** Piperacillin may prolong the action of vecuronium. * **Warfarin:** May decrease the efficacy of warfarin; monitor INR closely. * **Methotrexate:** May decrease methotrexate levels; monitor methotrexate levels. ## Monitoring * Renal function (CrCl) for dose adjustments. * Liver function tests. * Complete blood count (CBC), especially with prolonged therapy. * Signs and symptoms of infection resolution. * Signs of hypersensitivity reactions. * For patients on warfarin, monitor INR. ## Clinical Pearls * Piperacillin-tazobactam has broad-spectrum activity, including Pseudomonas aeruginosa. * Ensure adequate hydration to minimize the risk of crystalluria. * Doses are typically administered over 30 minutes intravenously. * Tazobactam does not extend the spectrum of activity but protects piperacillin from degradation by many beta-lactamases. *** *This information is for educational purposes and is not a substitute for professional medical advice. Always consult the most current prescribing information and your institution's protocols before making any clinical decisions.*