Drug interactions
Darifenacin + Tiotropium
Severity: Moderate
Darifenacin and Tiotropium: 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
Darifenacin is an antimuscarinic for overactive bladder, and combining it with tiotropium increases antimuscarinic load. Dry mouth, constipation, urinary retention and blurred vision may be more frequent.
What this interaction means in plain words
Darifenacin and Tiotropium 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; Tiotropium belongs to Respiratory.
Why it happens
Additive muscarinic receptor blockade.
What to do
Monitor for urinary retention, constipation and dry mouth. Reassess the need for both agents if symptoms are 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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Darifenacin and Tiotropium, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Tiotropium
Other interactions of Darifenacin
Frequently asked questions
Can I take Darifenacin with Tiotropium?
MediHelp rates the interaction as moderate. Darifenacin and Tiotropium 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 is an antimuscarinic for overactive bladder, and combining it with tiotropium increases antimuscarinic load. Dry mouth, constipation, urinary retention and blurred vision may be more frequent.
How serious is the interaction between Darifenacin and Tiotropium?
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 and dry mouth. Reassess the need for both agents if symptoms are troublesome.
What other medicines interact with Tiotropium?
MediHelp also lists interactions of Tiotropium with, for example, Glycopyrrolate inhaled, Indacaterol-glycopyrronium, Revefenacin. The full list is on the Tiotropium page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
