Drug interactions
Darifenacin + Revefenacin
Severity: Moderate
Darifenacin and Revefenacin: 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
Both drugs block muscarinic receptors, so using them together adds to anticholinergic effects such as dry mouth, constipation, urinary retention, blurred vision and tachycardia. Systemic absorption of inhaled revefenacin is low, so the effect is usually modest but can matter in older or susceptible patients.
What this interaction means in plain words
Darifenacin and Revefenacin 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; Revefenacin belongs to Respiratory.
Why it happens
Additive pharmacodynamic antagonism at muscarinic receptors.
What to do
Monitor for urinary retention, constipation, dry mouth, and ocular symptoms, especially in elderly patients or those with narrow-angle glaucoma or bladder outlet obstruction. Reduce or stop one agent if anticholinergic effects become troublesome.
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 Revefenacin
- Cyclosporin + Revefenacin Major
- Indacaterol-glycopyrronium + Revefenacin Major
- Revefenacin + Rifampicin Major
- Revefenacin + Tiotropium Major
- Atropine + Revefenacin Moderate
- Benztropine + Revefenacin Moderate
Frequently asked questions
Can I take Darifenacin with Revefenacin?
MediHelp rates the interaction as moderate. Darifenacin and Revefenacin 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. Both drugs block muscarinic receptors, so using them together adds to anticholinergic effects such as dry mouth, constipation, urinary retention, blurred vision and tachycardia. Systemic absorption of inhaled revefenacin is low, so the effect is usually modest but can matter in older or susceptible patients.
How serious is the interaction between Darifenacin and Revefenacin?
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 urinary retention, constipation, dry mouth, and ocular symptoms, especially in elderly patients or those with narrow-angle glaucoma or bladder outlet obstruction. Reduce or stop one agent if anticholinergic effects become troublesome.
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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