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# Piperacillin-Tazobactam
## Overview
Piperacillin is a broad-spectrum penicillin antibiotic, and tazobactam is a beta-lactamase inhibitor. This combination extends the spectrum of piperacillin to include 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
The typical dose is 3.375 grams every 6 hours or 4.5 grams every 8 hours intravenously.
* **Complicated intra-abdominal infections, complicated skin and skin structure infections, community-acquired pneumonia, nosocomial pneumonia:** 3.375 g IV every 6 hours or 4.5 g IV every 8 hours.
* **Febrile neutropenia:** 4.5 g IV every 6 hours.
Duration of therapy varies based on indication and clinical response.
## Pediatric Dosing
Dosing is based on piperacillin content.
* **Patients 2 months and older:** 80 mg piperacillin/10 mg tazobactam per kg per dose IV every 8 hours.
* **For serious infections or patients with febrile neutropenia:** 100 mg piperacillin/12.5 mg tazobactam per kg per dose IV every 6 hours.
* **Maximum dose:** 3.375 g per dose for every 6-hour dosing or 4.5 g per dose for every 8-hour dosing.
## Dose Adjustments
* **Renal Impairment (CrCl < 40 mL/min):** Reduce the frequency of administration. Consult product labeling or local guidelines for specific dose adjustments. Dosing intervals may be extended.
## Contraindications
* Known serious hypersensitivity to piperacillin, tazobactam, other piperacillin-piperacillin-tazobactam formulations, or any of its components.
* History of immediate or generalized reactions of hypersensitivity to penicillins, cephalosporins, or beta-lactams.
## Adverse Effects
* Diarrhea
* Nausea
* Rash
* Vomiting
* Headache
* Insomnia
* Fever
* Superinfections (e.g., Clostridioides difficile-associated diarrhea)
* Hypersensitivity reactions, including anaphylaxis
## Key Drug Interactions
* **Probenecid:** May increase and prolong piperacillin-tazobactam serum concentrations.
* **Neuromuscular blocking agents:** May prolong the neuromuscular blockade.
* **Methotrexate:** May decrease methotrexate levels.
* **Warfarin:** May decrease INR. Monitor INR closely.
## Monitoring
* Assess for signs and symptoms of infection.
* Monitor for hypersensitivity reactions.
* Monitor renal and hepatic function.
* Monitor for signs of superinfection.
* For patients on warfarin, monitor INR.
## Clinical Pearls
* Dose and frequency may vary based on the severity of infection and local antibiogram data. Always consult institutional guidelines.
* Administer intravenously over at least 30 minutes. Rapid infusion may increase the risk of hypersensitivity reactions.
* Consider potential for cross-reactivity in patients with penicillin allergy.
* Tazobactam does not have significant antibacterial activity on its own.
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**Disclaimer:** This information is for educational purposes only and does not constitute medical advice. Always verify current prescribing information with the official product labeling and consult with a qualified healthcare professional before making any treatment decisions.
