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Does Piperacillin And Tazobactam Interact with Gentamicin?

Piperacillin And Tazobactam and Gentamicin have a moderate drug interaction according to U.S. FDA drug labeling data. Piperacillin and tazobactam may inactivate gentamicin in vitro. Separate administration is recommended, though compatibility exists for simultaneous Y-site infusion in certain diluents and concentrations. The mechanism involves in vitro inactivation of aminoglycosides by piperacillin. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.

Severity
Moderate
Management
Monitor for effects
Data Source
U.S. FDA via OpenFDA

How This Interaction Works

The interaction between Piperacillin And Tazobactam and Gentamicin occurs because in vitro inactivation of aminoglycosides by piperacillin. Clinically, this means piperacillin and tazobactam may inactivate gentamicin in vitro. separate administration is recommended, though compatibility exists for simultaneous y-site infusion in certain diluents and concentrations. This is classified as a moderate interaction. While it may not require stopping either medication, your healthcare provider should be aware you are taking both so they can monitor for potential effects and adjust treatment if necessary.

What To Tell Your Doctor or Pharmacist

If you are taking Piperacillin And Tazobactam and your doctor is considering prescribing Gentamicin (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Ask whether any dosage adjustments are needed
  • Never stop or change either medication without first consulting your healthcare provider
💊 Piperacillin And Tazobactam(Zosyn)+💊 Gentamicin(Gentacalm)

Severity & Interaction Details

🟡
moderate
Be aware — moderate interaction
Documented interaction with manageable risk. May require dose adjustment or monitoring.
Severity scale
MinorContra
On record
Yes
Drug A class
—
Drug B class
—
Source
NLP:piperacillin and tazobactam

What this means in plain English

Piperacillin and tazobactam may inactivate gentamicin in vitro. Separate administration is recommended, though compatibility exists for simultaneous Y-site infusion in certain diluents and concentrations.

About Piperacillin And Tazobactam and Gentamicin

You may recognize them by the brand names Zosyn and Gentacalm. Piperacillin And Tazobactam is given by intravenous (IV) infusion. Piperacillin And Tazobactam additionally carries an FDA boxed warning, the FDA's strongest safety alert.

What the FDA label says

"In vitro inactivation of aminoglycosides by piperacillin"

📖 Source: NLP:piperacillin and tazobactam

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Data integrity: Every interaction shown is extracted directly from official U.S. FDA drug labeling via openFDA and the U.S. National Library of Medicine (NIH) — no interactions are invented, inferred, or manually edited. Maintained by CheckDrugInteractions.com. See our methodology or report a correction at support@checkdruginteractions.com.

Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine, supplemented with a small number of well-established interactions from curated clinical references. For informational purposes only. Always consult your pharmacist or physician.