Tazobactum%2525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520piperacillin

# 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 * Hospital-acquired pneumonia (including ventilator-associated pneumonia) * Febrile neutropenia (empiric treatment) * Bacterial infections caused by piperacillin-susceptible organisms in the presence of beta-lactamase-producing organisms. ## Adult Dosing The usual dose is 3.375 grams every 6 hours or 4.5 grams every 8 hours administered intravenously over 30 minutes. * Complicated intra-abdominal infections: 3.375 grams IV every 6 hours or 4.5 grams IV every 8 hours. * Complicated skin and skin structure infections: 3.375 grams IV every 6 hours or 4.5 grams IV every 8 hours. * Community-acquired pneumonia: 3.375 grams IV every 6 hours. * Hospital-acquired pneumonia: 4.5 grams IV every 6 or 8 hours. * Febrile neutropenia: 4.5 grams IV every 6 or 8 hours. Maximum daily dose is typically 18 grams. Duration of therapy depends on severity of infection and clinical response, generally 7-14 days. ## Pediatric Dosing Dosing is based on the piperacillin component. * **Neonates and infants younger than 12 months:** Limited data available; dosing is highly individualized and depends on gestational age, postnatal age, and indication. Consult specialized pediatric guidelines. * **Children 1 to 12 years:** * Complicated intra-abdominal infections: 90 to 100 mg piperacillin component/kg/dose IV every 8 hours. * Hospital-acquired pneumonia: 90 to 100 mg piperacillin component/kg/dose IV every 6 or 8 hours. * Febrile neutropenia: 100 mg piperacillin component/kg/dose IV every 6 or 8 hours. * Maximum dose: 4.5 grams per dose. The tazobactam component is typically dosed at 12.5% of the piperacillin dose. ## Dose Adjustments * **Renal Impairment (CrCl < 20 mL/min):** Reduce dose frequency. For doses given every 6 hours, extend to every 8 hours. For doses given every 8 hours, extend to every 12 hours. * **Hemodialysis:** Administer dose after dialysis and supplement with an additional dose (e.g., 2.25 grams). For doses given every 6 hours, administer 2.25 grams every 8 hours and supplement with 2.25 grams after each dialysis. For doses given every 8 hours, administer 4.5 grams every 12 hours and supplement with 2.25 grams after each dialysis. * **Hepatic Impairment:** No specific dose adjustment is recommended, but monitor liver function. ## Contraindications * Hypersensitivity to piperacillin, tazobactam, other penicillins, cephalosporins, or beta-lactams. * History of cholestatic jaundice or hepatic dysfunction associated with piperacillin-tazobactam. ## Adverse Effects * **Common:** Diarrhea, nausea, vomiting, rash, headache, insomnia, fever, eosinophilia, elevated liver enzymes (AST, ALT). * **Serious:** *Clostridioides difficile*-associated diarrhea, hypersensitivity reactions (anaphylaxis, Stevens-Johnson syndrome, DRESS), seizures (especially with high doses or renal impairment), hematologic changes (neutropenia, thrombocytopenia, anemia), interstitial nephritis, renal toxicity. ## Key Drug Interactions * **Probenecid:** Increases piperacillin-tazobactam serum levels. * **Neuromuscular blocking agents:** May prolong neuromuscular blockade. * **Warfarin:** May decrease the effect of warfarin; monitor INR closely. * **Methotrexate:** May decrease methotrexate clearance; monitor methotrexate levels. * **Tetracyclines, Chloramphenicol, Macrolides, Sulfonamides:** May antagonize the bactericidal effects of penicillins; avoid concurrent use. ## Monitoring * Renal function (creatinine, BUN) * Liver function tests (AST, ALT) * Complete blood count (CBC) with differential and platelets * Signs and symptoms of infection * Signs and symptoms of hypersensitivity reactions * Stool for *C. difficile* if diarrhea occurs ## Clinical Pearls * The combination targets beta-lactamase-producing bacteria, expanding the spectrum of activity of piperacillin. * Reconstituted solution should be used within 24 hours if refrigerated or within 12 hours if at room temperature. * Dosing adjustments are crucial in patients with renal impairment. * Discontinue if hypersensitivity reactions or severe diarrhea occur. *** *Disclaimer: This information is for educational purposes only and does not substitute for professional medical advice. Always consult the current prescribing information and your healthcare provider for complete and up-to-date drug information.*