Drug interactions
Piperacillin-tazobactam + Willow bark
Severity: Minor
Piperacillin-tazobactam and Willow bark: minor 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
Willow bark contains salicin, which is converted to salicylic acid, so it may behave like a low-dose salicylate. It could slightly compete with piperacillin for renal tubular secretion, but the effect is minor.
What this interaction means in plain words
Piperacillin-tazobactam and Willow bark have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Competition for renal organic anion tubular secretion by salicylate metabolites.
What to do
No routine action is needed; counsel patients on herbal salicylate use and monitor if renal function is poor.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Piperacillin-tazobactam
Frequently asked questions
Can I take Piperacillin-tazobactam with Willow bark?
MediHelp rates the interaction as minor. Piperacillin-tazobactam and Willow bark have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Willow bark contains salicin, which is converted to salicylic acid, so it may behave like a low-dose salicylate. It could slightly compete with piperacillin for renal tubular secretion, but the effect is minor.
How serious is the interaction between Piperacillin-tazobactam and Willow bark?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine action is needed; counsel patients on herbal salicylate use and monitor if renal function is poor.
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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