What is the brand name of piperacillin (Pip) and tazobactam (Taz), also known as Zosyn (piperacillin/tazobactam)?

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Brand Name of Piperacillin-Tazobactam

The brand name of piperacillin-tazobactam is Zosyn. 1

Background Information

Piperacillin-tazobactam (commonly abbreviated as Pip-Taz) is a beta-lactam/beta-lactamase inhibitor combination antibiotic with a broad spectrum of activity against:

  • Gram-positive bacteria
  • Gram-negative bacteria (including many extended-spectrum beta-lactamase producers)
  • Anaerobic bacteria 2

The combination consists of:

  • Piperacillin: An extended-spectrum penicillin (ureidopenicillin)
  • Tazobactam: A beta-lactamase inhibitor that protects piperacillin from degradation by many bacterial beta-lactamases

Formulation History

Zosyn was first approved by the US Food and Drug Administration in 1993 for the treatment of serious infections 1. The product was reformulated in 2005 to include two stabilizing functional excipients:

  1. Ethylenediaminetetraacetic acid disodium salt (EDTA disodium)
  2. Sodium citrate

This reformulation addressed issues with particulate formation and expanded compatibility with:

  • Lactated Ringer's solutions
  • Certain aminoglycosides (amikacin and gentamicin) for Y-site administration 1

Clinical Applications

Piperacillin-tazobactam is recommended for various clinical scenarios:

  • Severe intra-abdominal infections 3
  • Moderate to severe diabetic foot infections 3
  • Hospital-acquired and ventilator-associated pneumonia 3, 4
  • Febrile neutropenia 4
  • Skin and soft tissue infections 4, 5
  • Complicated urinary tract infections 5

Administration

Piperacillin-tazobactam is typically administered intravenously:

  • Traditional administration is via intravenous piggyback over 0.5 to 4.0 hours
  • More recent evidence suggests intravenous push administration through peripheral lines may be safe and tolerable 6

Important Considerations

  • Dosage adjustment is required in patients with renal impairment 4
  • Contains sodium, which may be clinically important in patients with conditions such as congestive heart failure 4
  • The combination is generally well-tolerated, with the most common adverse effects being gastrointestinal symptoms (particularly diarrhea) and skin reactions 5

In summary, Zosyn is the brand name for piperacillin-tazobactam, a widely used broad-spectrum antibiotic combination for moderate to severe infections in hospitalized patients.

References

Research

Piperacillin-tazobactam: a beta-lactam/beta-lactamase inhibitor combination.

Expert review of anti-infective therapy, 2007

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Guideline

Antibiotic Therapy with Piperacillin-Tazobactam

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

Research

Safety and tolerability of i.v. push piperacillin/tazobactam within an emergency department.

American journal of health-system pharmacy : AJHP : official journal of the American Society of Health-System Pharmacists, 2020

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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