Tazobactum%252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520piperacillin

# Piperacillin-Tazobactam ## Overview Piperacillin-tazobactam is a combination penicillin-class antibacterial and beta-lactamase inhibitor. It is active against a broad spectrum of gram-positive, gram-negative, and anaerobic bacteria. ## Primary Indications * Complicated intra-abdominal infections. * Complicated skin and skin-structure infections. * Community-acquired pneumonia. * Nosocomial pneumonia. ## Adult Dosing * **Complicated Intra-abdominal Infections, Complicated Skin and Skin-Structure Infections:** * 3.375 grams every 6 hours or 4.5 grams every 6 or 8 hours intravenously. * Duration is typically 7 to 14 days. * **Community-Acquired Pneumonia:** * 3.375 grams every 6 hours intravenously. * Duration is typically 7 days. * **Nosocomial Pneumonia:** * 4.5 grams every 6 hours intravenously. * Duration is typically 7 to 14 days. * **Maximum Daily Dose:** Generally not to exceed 18 grams per day, depending on indication and renal function. Specific maximums can vary based on local protocols. ## Pediatric Dosing * **Intra-abdominal Infections (aged 3 months and older):** * **Weight-based:** 100 mg piperacillin component/12.5 mg tazobactam component per kg per dose given every 6 hours intravenously. * **Maximum Dose:** 3.375 grams per dose. * **Complicated Skin and Skin-Structure Infections (aged 3 months and older):** * **Weight-based:** 75 mg piperacillin component/9.375 mg tazobactam component per kg per dose given every 6 hours intravenously. * **Maximum Dose:** 3.375 grams per dose. * **Nosocomial Pneumonia (aged 3 months and older):** * **Weight-based:** 100 mg piperacillin component/12.5 mg tazobactam component per kg per dose given every 6 hours intravenously. * **Maximum Dose:** 4.5 grams per dose. * Dosing for pediatric patients weighing over 40 kg should generally not exceed the adult dose. ## Dose Adjustments * **Renal Impairment (CrCl < 40 mL/min):** * For standard 6-hour dosing regimens: * CrCl 20-40 mL/min: 2.25 grams every 6 hours (for 3.375 g formulation) or 3.375 grams every 8 hours (for 4.5 g formulation). * CrCl < 20 mL/min: 2.25 grams every 8 hours (for 3.375 g formulation) or 3.375 grams every 12 hours (for 4.5 g formulation). * Dosing should be adjusted based on the specific piperacillin-tazobactam formulation and local protocols. * **Hemodialysis:** Administer dose after dialysis and supplement with an additional dose equal to one-third of the usual dose. ## Contraindications * Known history of severe allergic reaction to piperacillin, tazobactam, other penicillins, or beta-lactamase inhibitors. ## Adverse Effects * **Common:** Diarrhea, rash, nausea, vomiting, headache, insomnia, constipation, abdominal pain, fever. * **Serious:** *Clostridioides difficile*-associated diarrhea, hypersensitivity reactions (including anaphylaxis), seizures (especially with high doses or renal impairment), interstitial nephritis, hematologic changes (neutropenia, thrombocytopenia, eosinophilia, leukopenia), liver enzyme elevations. ## Key Drug Interactions * **Probenecid:** May increase and prolong piperacillin plasma concentrations. * **Vecuronium:** Piperacillin may prolong the neuromuscular blockade of vecuronium. * **Warfarin:** May decrease the effect of warfarin; monitor INR closely. * **Methotrexate:** May decrease methotrexate serum levels; monitor methotrexate levels. ## Monitoring * Renal function (BUN, creatinine). * Liver function tests (AST, ALT, bilirubin). * Complete blood count (CBC) with differential and platelets. * Signs and symptoms of hypersensitivity reactions. * Signs and symptoms of *Clostridioides difficile*-associated diarrhea. * Therapeutic drug monitoring of piperacillin is generally not required but may be considered in specific situations (e.g., severe illness, renal/hepatic impairment). ## Clinical Pearls * Piperacillin-tazobactam has a broad spectrum of activity but resistance can emerge, particularly with *Pseudomonas aeruginosa*. * The addition of tazobactam extends the spectrum to include many beta-lactamase producing organisms. * Monitor for signs of C. difficile-associated diarrhea. * Dosing adjustments are crucial in patients with renal impairment. * The infusion time for piperacillin-tazobactam should be at least 30 minutes to reduce the incidence of infusion-related reactions. *** *This information is intended for healthcare professionals and does not replace the need to consult the official prescribing information for piperacillin-tazobactam, which may include additional details, contraindications, warnings, and precautions. Always verify current prescribing information before use.*