Drug interactions
Darifenacin + Stiripentol
Severity: Moderate
Darifenacin and Stiripentol: 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
Stiripentol inhibits and also induces CYP3A4, so exposure to darifenacin, a CYP3A4 substrate, may rise or fall unpredictably. This could cause more anticholinergic adverse effects or reduced bladder control.
What this interaction means in plain words
Darifenacin and Stiripentol 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.
Darifenacin belongs to Genitourinary; Stiripentol belongs to Central Nervous System.
Why it happens
Stiripentol has mixed CYP3A4 inhibitory and inducing effects that alter the metabolism of darifenacin.
What to do
Monitor for anticholinergic effects such as dry mouth, constipation and urinary retention, and for loss of efficacy. Adjust the darifenacin dose according to response.
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 Darifenacin
Other interactions of Stiripentol
Frequently asked questions
Can I take Darifenacin with Stiripentol?
MediHelp rates the interaction as moderate. Darifenacin and Stiripentol 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. Stiripentol inhibits and also induces CYP3A4, so exposure to darifenacin, a CYP3A4 substrate, may rise or fall unpredictably. This could cause more anticholinergic adverse effects or reduced bladder control.
How serious is the interaction between Darifenacin and Stiripentol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for anticholinergic effects such as dry mouth, constipation and urinary retention, and for loss of efficacy. Adjust the darifenacin dose according to response.
What other medicines interact with Darifenacin?
MediHelp also lists interactions of Darifenacin with, for example, Atazanavir, Bethanechol, Clarithromycin. The full list is on the Darifenacin page.
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