Drug interactions
Piperacillin-tazobactam + Probenecid
Severity: Moderate
Piperacillin-tazobactam and Probenecid: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Probenecid reduces the renal tubular secretion of piperacillin, raising and prolonging its serum concentrations and half-life. This can increase the risk of dose-related adverse effects such as neurotoxicity or seizures, especially in renal impairment.
What this interaction means in plain words
Piperacillin-tazobactam and Probenecid can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Piperacillin-tazobactam belongs to Anti Bacterial; Probenecid belongs to Genitourinary.
Why it happens
Competition for renal tubular anionic transport (OAT) reduces piperacillin clearance.
What to do
Avoid routine combination unless prolonged exposure is intended; if used, consider reducing the piperacillin dose. Monitor for neurotoxicity, especially in renal impairment.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Piperacillin-tazobactam
Other interactions of Probenecid
- Ketorolac intranasal + Probenecid Contraindicated
- Ketorolac + Probenecid Contraindicated
- Baricitinib + Probenecid Major
- Ceftazidime / avibactam + Probenecid Major
- Methotrexate + Probenecid Major
- Pralatrexate + Probenecid Major
Frequently asked questions
Can I take Piperacillin-tazobactam with Probenecid?
MediHelp rates the interaction as moderate. Piperacillin-tazobactam and Probenecid can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Probenecid reduces the renal tubular secretion of piperacillin, raising and prolonging its serum concentrations and half-life. This can increase the risk of dose-related adverse effects such as neurotoxicity or seizures, especially in renal impairment.
How serious is the interaction between Piperacillin-tazobactam and Probenecid?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid routine combination unless prolonged exposure is intended; if used, consider reducing the piperacillin dose. Monitor for neurotoxicity, especially in renal impairment.
What other medicines interact with Piperacillin-tazobactam?
MediHelp also lists interactions of Piperacillin-tazobactam with, for example, Vancomycin, Amikacin, Antithrombin alfa. The full list is on the Piperacillin-tazobactam page.
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