Tazobactum%25252525252525252525252525252525252525252525252525252525252525252520piperacillin

## 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 provides enhanced activity against many beta-lactamase-producing bacteria. ### Primary Indications * Complicated intra-abdominal infections * Complicated skin and skin structure infections * Community-acquired pneumonia * Nosocomial pneumonia * Febrile neutropenia (empiric treatment) ### Adult Dosing Standard dose is **3.375 grams** every 6 hours or **4.5 grams** every 8 hours intravenously (IV). Each dose contains 3 grams of piperacillin and 0.375 grams of tazobactam (for 3.375g dose) or 4 grams of piperacillin and 0.5 grams of tazobactam (for 4.5g dose). Higher doses may be used for severe infections or infections caused by less susceptible organisms, up to **4.5 grams every 6 hours IV**. Duration of therapy depends on the type and severity of infection and clinical response. ### Pediatric Dosing * **Patients 2 months and older:** Dosing is based on piperacillin component. * **Complicated intra-abdominal infections:** **90 mg/kg (piperacillin component) every 6 hours IV**. Maximum dose **4 grams per dose**. * **Complicated skin and skin structure infections:** **112.5 mg/kg (piperacillin component) every 8 hours IV**. Maximum dose **4 grams per dose**. * **Complicated skin and skin structure infections and community-acquired pneumonia:** **202.5 mg/kg (piperacillin component) every 12 hours IV**. Maximum dose **4 grams per dose**. **Note:** Tazobactam component is typically **1/8th** of the piperacillin dose. Consult specific pediatric guidelines for exact tazobactam dosing and to confirm total daily dose in mg/kg for both components. Weight-based dosing should not exceed the maximum adult dose of 4.5 grams per dose. ### Dose Adjustments * **Renal Impairment:** * CrCl 20-80 mL/min: Reduce frequency to every 8 hours. * CrCl < 20 mL/min: Reduce frequency to every 12 hours. * If patient is on intermittent hemodialysis, administer dose every 12 hours and supplement with one additional dose after each dialysis session. * Dosing adjustments may need to be more frequent with higher doses or severe infections. * **Hepatic Impairment:** No specific dose adjustment is recommended, but caution is advised. ### Contraindications * Known severe hypersensitivity to piperacillin, tazobactam, other beta-lactam antibiotics, or any component of the formulation. ### Adverse Effects * **Common:** Diarrhea, rash, nausea, vomiting, headache, insomnia, constipation. * **Serious:** Clostridioides difficile-associated diarrhea (CDAD), hypersensitivity reactions (including anaphylaxis), seizures (especially with high doses or renal impairment), neutropenia, thrombocytopenia, liver enzyme elevations. ### Key Drug Interactions * **Probenecid:** May increase and prolong serum concentrations of piperacillin and tazobactam. * **Neuromuscular blocking agents (e.g., vecuronium):** Piperacillin may prolong the effect of vecuronium. * **Warfarin:** May decrease INR. Monitor INR closely. * **Methotrexate:** Piperacillin may decrease methotrexate clearance. Monitor methotrexate levels. * **Tetracyclines, chloramphenicol, aminoglycosides:** May antagonize the bactericidal effects of penicillins. Avoid concurrent use. ### Monitoring * Renal function (BUN, creatinine) * Liver function tests (AST, ALT) * Complete blood count (CBC) with differential (especially in prolonged therapy or suspected neutropenia/thrombocytopenia) * Signs and symptoms of infection * Clostridioides difficile testing if diarrhea develops. * Electrolytes ### Clinical Pearls * Administer IV infusions over at least 30 minutes to minimize infusion-related reactions. * Do not add piperacillin-tazobactam to lipid emulsions or other non-IV solutions. * Consider de-escalation to a narrower spectrum agent once culture and sensitivity results are available. * Use with caution in patients with a history of gastrointestinal disease, particularly colitis. * High doses and renal impairment are risk factors for seizures. *** *Please verify the current prescribing information and local institutional guidelines for the most up-to-date and specific recommendations.*