Please check your internet connection and try again.
# Piperacillin-Tazobactam
## Overview
Piperacillin-tazobactam is a combination antibiotic consisting of piperacillin, a broad-spectrum penicillin-class antibacterial, and tazobactam, a beta-lactamase inhibitor. The addition of tazobactam broadens the spectrum of piperacillin to include many beta-lactamase producing bacteria.
## Primary Indications
* Complicated intra-abdominal infections
* Complicated skin and skin structure infections (including diabetic foot infections)
* Community-acquired pneumonia
* Nosocomial pneumonia
* Febrile neutropenia (empiric treatment)
## Adult Dosing
Standard dosing is 3.375 grams every 6 hours or 4.5 grams every 6 or 8 hours intravenously. The choice of frequency depends on the indication and institutional protocol.
## Pediatric Dosing
Dosing varies significantly by indication and age/weight. For complicated intra-abdominal infections in patients 2 months and older, common dosing is 100 mg piperacillin/12.5 mg tazobactam per kg per dose administered every 8 hours for patients younger than 2 months to 2 years, and every 6 hours for patients older than 2 years.
For further pediatric dosing details, consult specific guidelines or institutional protocols.
## Dose Adjustments
* **Renal Impairment:**
* CrCl > 40 mL/min: No adjustment needed.
* CrCl 20-40 mL/min: 2.25 grams every 6 hours or 3.375 grams every 8 hours.
* CrCl < 20 mL/min: 2.25 grams every 8 hours or 3.375 grams every 12 hours.
* For doses administered more frequently (e.g., every 6 hours), consider reducing the interval.
* Hemodialysis: Administer 2.25 grams every 8 hours plus an additional dose of 0.75 grams after each hemodialysis session.
## Contraindications
* History of an allergic reaction to piperacillin, tazobactam, or other beta-lactam antibiotics.
## Adverse Effects
Common: Diarrhea, nausea, vomiting, rash, injection site reactions, headache, insomnia, fever.
Serious: *Clostridioides difficile*-associated diarrhea, hypersensitivity reactions (including anaphylaxis), seizures, hepatic dysfunction, interstitial nephritis, hematologic abnormalities (e.g., neutropenia, thrombocytopenia).
## Key Drug Interactions
* **Probenecid:** May increase piperacillin-tazobactam levels.
* **Neuromuscular blocking agents (e.g., vecuronium):** Piperacillin may prolong the effect of vecuronium.
* **Warfarin:** Piperacillin may decrease the effect of warfarin. Monitor INR closely.
* **Methotrexate:** Piperacillin may decrease methotrexate clearance. Monitor methotrexate levels.
* **Aminoglycosides:** Although often used concomitantly for synergistic coverage, physical or chemical inactivation can occur if mixed. Administer separately.
## Monitoring
* Renal function (creatinine, BUN)
* Liver function (AST, ALT)
* Complete blood count (CBC)
* Signs and symptoms of infection
* *Clostridioides difficile* toxin assay if diarrhea develops.
## Clinical Pearls
* Piperacillin-tazobactam covers many Gram-positive, Gram-negative, and anaerobic bacteria, including *Pseudomonas aeruginosa*.
* It is active against many beta-lactamase producing organisms.
* Dosing frequency in adults often depends on institutional protocols for specific indications and severity of illness.
* Doses are typically given over 30 minutes intravenously.
* Discontinuation of piperacillin-tazobactam may be considered once culture and sensitivity results are available and guide de-escalation.
***
*This information is for educational purposes and is not a substitute for professional medical advice. Always consult the most current prescribing information and institutional protocols before administering any medication.*
