Drug interactions
Rifabutin + Tolterodine
Severity: Minor
Rifabutin and Tolterodine: 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
Rifabutin induces CYP3A4 and can reduce tolterodine concentrations. The effect is probably modest given the CYP2D6 pathway, but symptom control may worsen.
What this interaction means in plain words
Rifabutin and Tolterodine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Rifabutin belongs to Anti Bacterial; Tolterodine belongs to Genitourinary.
Why it happens
CYP3A4 induction by rifabutin increases tolterodine clearance.
What to do
No empirical adjustment is required; review bladder symptom control and increase the dose if needed.
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 Tolterodine
Other interactions of Rifabutin
- Cabotegravir + Rifabutin Contraindicated
- Lorlatinib + Rifabutin Contraindicated
- Rifabutin + Voriconazole Contraindicated
- Apixaban + Rifabutin Major
- Axitinib + Rifabutin Major
- Brexpiprazole + Rifabutin Major
Frequently asked questions
Can I take Rifabutin with Tolterodine?
MediHelp rates the interaction as minor. Rifabutin and Tolterodine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Rifabutin induces CYP3A4 and can reduce tolterodine concentrations. The effect is probably modest given the CYP2D6 pathway, but symptom control may worsen.
How serious is the interaction between Rifabutin and Tolterodine?
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 empirical adjustment is required; review bladder symptom control and increase the dose if needed.
What other medicines interact with Tolterodine?
MediHelp also lists interactions of Tolterodine with, for example, Clarithromycin, Clozapine, Cobicistat. The full list is on the Tolterodine page.
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