Drug interactions
Bendamustine + Rifampin
Severity: Minor
Bendamustine and Rifampin: 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
Rifampin is a broad enzyme inducer that may increase CYP1A2-mediated clearance of bendamustine. CYP1A2 is a minor elimination route, so the effect on overall exposure is likely modest.
What this interaction means in plain words
Bendamustine and Rifampin 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
Induction of CYP1A2 by rifampin may increase bendamustine metabolism.
What to do
No routine dose change is required; monitor treatment efficacy and toxicity and consider alternatives if rifampin is not essential.
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 Bendamustine
Frequently asked questions
Can I take Bendamustine with Rifampin?
MediHelp rates the interaction as minor. Bendamustine and Rifampin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Rifampin is a broad enzyme inducer that may increase CYP1A2-mediated clearance of bendamustine. CYP1A2 is a minor elimination route, so the effect on overall exposure is likely modest.
How serious is the interaction between Bendamustine and Rifampin?
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 dose change is required; monitor treatment efficacy and toxicity and consider alternatives if rifampin is not essential.
What other medicines interact with Bendamustine?
MediHelp also lists interactions of Bendamustine with, for example, Axicabtagene ciloleucel, Brexucabtagene autoleucel, Chlorambucil. The full list is on the Bendamustine page.
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