Tazobactum%2525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520piperacillin

# Piperacillin-Tazobactam ## Overview Piperacillin-tazobactam is a combination antibiotic consisting of a broad-spectrum penicillin-class antibacterial agent (piperacillin) and a beta-lactamase inhibitor (tazobactam). It is bactericidal. ## Primary Indications * Complicated intra-abdominal infections * Complicated skin and skin structure infections (including diabetic foot infections) * Community-acquired pneumonia * Nosocomial pneumonia * Febrile neutropenia (empiric treatment) ## Adult Dosing Standard dosing is 3.375 grams every 6 hours or 4.5 grams every 6 or 8 hours. Dosing frequency and duration depend on the indication, severity of infection, and patient response. Dosing is typically based on the piperacillin component. ## Pediatric Dosing For patients 2 months and older: * **Complicated intra-abdominal infections:** 100 mg piperacillin/12.5 mg tazobactam per kg per dose every 8 hours. * **Febrile neutropenia:** 100 mg piperacillin/12.5 mg tazobactam per kg per dose every 8 hours. * Maximum dose: 4.5 grams per dose. * Consult specific institutional guidelines or literature for more detailed pediatric dosing and renal/hepatic adjustments. ## Dose Adjustments * **Renal Impairment (CrCl < 20 mL/min):** Reduce dose frequency. For standard dosing regimens, administer every 8 or 12 hours depending on the specific regimen. For doses exceeding 2 grams of piperacillin, standard doses should be reduced by one-third. * **Hepatic Impairment:** No specific dose adjustment is generally recommended, but caution is advised. ## Contraindications * Hypersensitivity to piperacillin, tazobactam, other penicillins, or any component of the formulation. * History of severe immediate allergic reaction to beta-lactams. ## Adverse Effects * Diarrhea, nausea, vomiting, rash, pruritus, headache, insomnia. * **Serious:** Clostridioides difficile-associated diarrhea, hypersensitivity reactions (including anaphylaxis), seizures, interstitial nephritis, hematologic changes (neutropenia, thrombocytopenia). ## Key Drug Interactions * **Probenecid:** May increase and prolong piperacillin-tazobactam serum concentrations. * **Neuromuscular blocking agents:** May prolong neuromuscular blockade. * **Warfarin:** May decrease warfarin effect. Monitor INR closely. * **Methotrexate:** May decrease methotrexate serum levels. ## Monitoring * Renal function (baseline and periodically). * Liver function tests. * Complete blood count (especially in prolonged therapy). * Signs and symptoms of infection and hypersensitivity. * Electrolytes. ## Clinical Pearls * Piperacillin-tazobactam is a combination product; dosing is based on the total drug content (e.g., 3.375 g = 3 g piperacillin + 0.375 g tazobactam). * Administer by slow intravenous infusion over at least 30 minutes to reduce the risk of infusion-related reactions. * Reconstituted solutions should be used within 24 hours when refrigerated or within 12 hours at room temperature. * Potential for cross-reactivity in patients with penicillin allergy; exercise caution. * The development of resistance is possible; use appropriately. *** *This information is for educational purposes and does not substitute for professional medical advice. Always consult the current prescribing information and institutional protocols before making any treatment decisions.*