Please check your internet connection and try again.
# Piperacillin-Tazobactam
## Overview
Piperacillin-tazobactam is a combination antibiotic consisting of an extended-spectrum penicillin (piperacillin) and a beta-lactamase inhibitor (tazobactam). Tazobactam protects piperacillin from degradation by many beta-lactamase enzymes, broadening its spectrum of activity against susceptible bacteria.
## Primary Indications
* Complicated intra-abdominal infections
* Complicated skin and skin-structure infections
* Community-acquired pneumonia
* Nosocomial pneumonia
* Febrile neutropenia (empiric treatment)
## Adult Dosing
* **Intra-abdominal infections, skin and skin-structure infections:** 3.375 grams IV every 6 hours or 4.5 grams IV every 8 hours.
* **Community-acquired pneumonia, nosocomial pneumonia:** 3.375 grams IV every 6 hours or 4.5 grams IV every 8 hours.
* **Febrile neutropenia:** 4.5 grams IV every 6 hours.
Duration of therapy typically ranges from 7 to 14 days, depending on the indication and patient response.
## Pediatric Dosing
Dosing is based on piperacillin component and patient weight. Actual dose, frequency, and duration are often guided by institutional protocols and clinical judgment.
* **Infants and children 2 months and older:**
* **Complicated intra-abdominal infections, skin and skin-structure infections, community-acquired pneumonia, nosocomial pneumonia:** Generally dosed at 90 to 100 mg piperacillin component/kg/day IV divided every 6 or 8 hours. Maximum single dose is typically 3.375 grams or 4.5 grams.
* **Febrile neutropenia:** Generally dosed at 100 mg piperacillin component/kg/day IV divided every 6 or 8 hours. Maximum single dose is typically 4.5 grams.
## Dose Adjustments
* **Renal Impairment:** Dose adjustment is required for patients with a creatinine clearance (CrCl) < 40 mL/min.
* CrCl 20-40 mL/min: Administer usual dose every 8 hours.
* CrCl < 20 mL/min: Administer usual dose every 12 hours.
* Consider hemodialysis and CRRT schedules; an additional dose after dialysis is recommended.
## Contraindications
* Hypersensitivity to piperacillin, tazobactam, or any component of the formulation.
* History of a severe allergic reaction (e.g., anaphylaxis) to penicillins, cephalosporins, or beta-lactamase inhibitors.
## Adverse Effects
* **Common:** Diarrhea, rash, nausea, vomiting, headache, insomnia, constipation, dyspnea, elevated liver enzymes (AST, ALT).
* **Serious:** *Clostridioides difficile*-associated diarrhea, hypersensitivity reactions (including anaphylaxis), seizures (rare, especially with high doses or renal impairment), neutropenia, thrombocytopenia, interstitial nephritis, hemolytic anemia.
## Key Drug Interactions
* **Probenecid:** May increase and prolong piperacillin-tazobactam serum concentrations.
* **Neuromuscular blocking agents (e.g., vecuronium):** Piperacillin may prolong the neuromuscular blockade.
* **Warfarin:** Monitor INR closely as piperacillin may decrease warfarin's effect.
* **Methotrexate:** Piperacillin may decrease methotrexate clearance; monitor methotrexate levels.
## Monitoring
* Renal function (baseline and periodically, especially with impaired renal function or concomitant nephrotoxic agents).
* Liver function tests (periodically).
* Complete blood counts (especially during prolonged therapy or in patients with neutropenia).
* Signs and symptoms of hypersensitivity reactions.
* Signs and symptoms of *C. difficile*-associated diarrhea.
## Clinical Pearls
* Piperacillin-tazobactam is a broad-spectrum agent often used for serious bacterial infections, including those caused by Gram-negative organisms and some Gram-positive bacteria. It has activity against *Pseudomonas aeruginosa*.
* The beta-lactamase inhibitor tazobactam is crucial for its expanded spectrum against beta-lactamase-producing organisms.
* Reconstituted solutions should be infused over at least 30 minutes to minimize the risk of infusion-related reactions.
* The presence of sodium in the formulation should be considered in patients requiring sodium restriction. Each 3.375 g vial contains approximately 2.35 mmol of sodium per gram of piperacillin. Each 4.5 g vial contains approximately 2.35 mmol of sodium per gram of piperacillin.
***
**Disclaimer:** This information is intended for healthcare professionals. Always consult the current prescribing information and relevant literature for complete details and to verify accuracy before making clinical decisions. Local protocols and guidelines may vary.
