Tazobactum%25252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520piperacillin

# Piperacillin-Tazobactam ## Overview Piperacillin-tazobactam is a combination antibiotic consisting of piperacillin, a broad-spectrum penicillin antibiotic, and tazobactam, a beta-lactamase inhibitor. Tazobactam protects piperacillin from degradation by many beta-lactamase enzymes, thereby extending its spectrum of activity against beta-lactamase-producing bacteria. ## Primary Indications * Complicated intra-abdominal infections * Complicated skin and skin structure infections * Community-acquired pneumonia * Nosocomial pneumonia * Febrile neutropenia (as empiric therapy) ## Adult Dosing The typical dose is 3.375 grams (3 grams piperacillin/0.375 grams tazobactam) or 4.5 grams (4 grams piperacillin/0.5 grams tazobactam) administered intravenously every 6 to 8 hours. * **Complicated intra-abdominal infections, complicated skin and skin structure infections, community-acquired pneumonia, nosocomial pneumonia:** * 3.375 grams IV every 6 hours OR 4.5 grams IV every 6 or 8 hours. Duration typically 7 to 14 days depending on infection severity and patient response. * **Febrile neutropenia:** * 4.5 grams IV every 6 hours. Duration typically 7 days or until resolution of neutropenia and fever. Dosing frequency and duration are often guided by local protocols and clinical judgment. ## Pediatric Dosing For pediatric patients (birth to 12 years of age): * **Complicated intra-abdominal infections:** * Dosing is based on piperacillin weight: * 3 months to 12 years: 90 mg/kg piperacillin (equivalent to 100 mg/kg piperacillin-tazobactam) IV every 8 hours. * Children weighing > 50 kg should be dosed as per adult recommendations. * Maximum dose: 4.5 grams IV every 6 hours (or equivalent based on ratio). * **Neonates and infants < 3 months:** Dosing and safety are not well established. ## Dose Adjustments * **Renal Impairment:** * CrCl > 40 mL/min: No adjustment needed. * CrCl 20-40 mL/min: 2.25 grams (2g piperacillin/0.25g tazobactam) IV every 6 hours or 3.375 grams (3g piperacillin/0.375g tazobactam) IV every 8 hours. * CrCl < 20 mL/min: 2.25 grams IV every 8 hours or 3.375 grams IV every 12 hours. * For patients on hemodialysis: 2.25 grams IV every 8 hours or 3.375 grams IV every 12 hours, with an additional dose after each dialysis session. ## Contraindications * Hypersensitivity to piperacillin, tazobactam, other penicillin antibiotics, or beta-lactamase inhibitors. * History of a severe allergic reaction (e.g., anaphylaxis) to a beta-lactam antibiotic. ## Adverse Effects Common: Diarrhea, nausea, vomiting, rash, headache, insomnia. Serious: *Clostridioides difficile*-associated diarrhea, hypersensitivity reactions (including anaphylaxis), Stevens-Johnson syndrome, toxic epidermal necrolysis, seizures (especially with high doses or renal impairment), liver enzyme elevations, interstitial nephritis. ## Key Drug Interactions * **Probenecid:** May decrease renal clearance of piperacillin-tazobactam, leading to increased serum concentrations. * **Neuromuscular blocking agents:** Piperacillin may prolong the action of vecuronium. * **Methotrexate:** Penicillins may decrease methotrexate clearance. Monitor methotrexate levels closely. * **Warfarin:** Case reports suggest that piperacillin-tazobactam may decrease the effect of warfarin. Monitor INR. * **Live attenuated vaccines:** Efficacy may be decreased. ## Monitoring * Renal function (CrCl) for dose adjustment. * Signs and symptoms of hypersensitivity reactions. * Signs and symptoms of *C. difficile*-associated diarrhea. * Liver function tests. * INR if patient is on warfarin. * Electrolytes, especially in patients with prolonged therapy or underlying conditions. ## Clinical Pearls * Administer IV infusion over at least 30 minutes. Rapid infusion can increase the risk of seizures. * Reconstituted solutions should be used within 24 hours when refrigerated or within 12 hours at room temperature (check manufacturer specific instructions). * Consider dose rounding for ease of administration in specific renal impairment categories. * For febrile neutropenia, piperacillin-tazobactam provides broad coverage against common pathogens, including *Pseudomonas aeruginosa*. *** **Disclaimer:** This information is intended for healthcare professionals. It is essential to consult the most current prescribing information and relevant clinical guidelines for definitive patient management. Dosing and recommendations can vary based on local protocols and individual patient factors.