Tazobactum%2525252525252525252525252525252525252525252520piperacillin

# Piperacillin-Tazobactam ## Overview Piperacillin-tazobactam is a combination antibiotic consisting of piperacillin, a broad-spectrum penicillin antibiotic, and tazobactam, a beta-lactamase inhibitor. This combination extends the spectrum of piperacillin to include many beta-lactamase producing bacteria. It is typically administered intravenously. ## Primary Indications * Complicated intra-abdominal infections * Complicated skin and skin structure infections * Pneumonia (community-acquired and hospital-acquired) * Febrile neutropenia (empiric treatment) * Bacterial meningitis (specific indications) * Other serious infections caused by susceptible organisms. ## Adult Dosing Dosing varies significantly based on indication and severity. Common regimens include: * **Complicated Intra-abdominal Infections:** 3.375 g every 6 hours or 4.5 g every 8 hours IV. Duration typically 5-14 days. * **Complicated Skin and Skin Structure Infections:** 3.375 g every 6 hours or 4.5 g every 8 hours IV. Duration typically 7-10 days. * **Community-Acquired Pneumonia:** 3.375 g every 6 hours or 4.5 g every 8 hours IV. Duration typically 7 days. * **Hospital-Acquired Pneumonia:** 4.5 g every 6 hours IV. May consider higher doses or longer durations in severe cases or with resistant organisms. * **Febrile Neutropenia:** 4.5 g every 6 hours IV. Duration depends on neutropenia resolution and clinical response. Maximum adult dose is generally 4.5 g every 6 hours. Specific dosing for other indications may exist. ## Pediatric Dosing Dosing is based on piperacillin component, typically 80-100 mg piperacillin per kg per dose, given every 6 or 8 hours. Tazobactam is dosed as 10 mg piperacillin equivalent per kg per dose. * **Children < 2 months:** Dosing is less established and often guided by local protocols and expert consultation. * **Children ≥ 2 months:** * **Complicated Intra-abdominal Infections:** 80 mg piperacillin/10 mg tazobactam per kg per dose every 6 hours IV. * **Complicated Skin and Skin Structure Infections:** 100 mg piperacillin/12.5 mg tazobactam per kg per dose every 8 hours IV. * **Febrile Neutropenia:** 100 mg piperacillin/12.5 mg tazobactam per kg per dose every 8 hours IV. Maximum pediatric dose should not exceed the maximum adult dose. ## Dose Adjustments * **Renal Impairment (CrCl ≤ 20 mL/min):** Reduce frequency. For standard regimens (e.g., 3.375 g q6h), administer 2.25 g every 6 hours. For higher dose regimens (e.g., 4.5 g q8h), administer 4.5 g every 12 hours. If on intermittent hemodialysis, administer dose after dialysis. * **Hepatic Impairment:** No dose adjustment is typically recommended. ## Contraindications * Known hypersensitivity to piperacillin, tazobactam, other penicillin antibiotics, or any component of the formulation. * History of cholestatic jaundice or hepatic dysfunction associated with piperacillin-tazobactam. ## Adverse Effects * **Common:** Diarrhea, rash, nausea, vomiting, headache, insomnia, eosinophilia, elevated AST/ALT. * **Serious:** Anaphylaxis, Clostridioides difficile-associated diarrhea (CDAD), hypersensitivity reactions, seizure (rare, higher doses/renal impairment), neutropenia, thrombocytopenia, Coombs test positive. ## Key Drug Interactions * **Probenecid:** Increases piperacillin levels. * **Neuromuscular Blocking Agents (e.g., vecuronium):** Piperacillin may prolong the neuromuscular blockade. * **Methotrexate:** Penicillins may decrease methotrexate clearance, leading to increased toxicity. * **Oral Contraceptives:** Reduced efficacy of oral contraceptives. * **Warfarin:** May alter INR. Monitor INR closely. ## Monitoring * **Renal function:** Especially in patients with pre-existing renal impairment or those receiving concomitant nephrotoxic agents. * **Liver function tests:** Periodic monitoring may be warranted. * **Complete blood count:** Monitor for hematologic changes (neutropenia, thrombocytopenia). * **Signs of hypersensitivity reactions:** Monitor closely during and after administration. * **Signs and symptoms of CDAD:** Monitor for persistent diarrhea. * **Therapeutic drug monitoring:** Not routinely required, but may be considered in specific situations based on clinical judgment. ## Clinical Pearls * Piperacillin-tazobactam is a broad-spectrum agent and should be used judiciously to prevent resistance. * Administer over at least 30 minutes (or 40 minutes for 4.5 g dose) to reduce the risk of infusion-related reactions. * Reconstituted solutions are stable for 24 hours at room temperature or 48 hours under refrigeration. * Bactericidal activity is concentration-dependent for piperacillin. * Discontinue if hypersensitivity or significant adverse events occur. *** *Disclaimer: This information is intended for healthcare professionals. Always consult the most current prescribing information and relevant clinical guidelines for complete details and to verify dosing and safety information before initiating treatment.*