Drug interactions
Darifenacin + Glycopyrrolate
Severity: Moderate
Darifenacin and Glycopyrrolate: 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 combined use increases anticholinergic effects such as dry mouth, constipation, urinary retention, blurred vision and tachycardia. Older patients are particularly susceptible.
What this interaction means in plain words
Darifenacin and Glycopyrrolate 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; Glycopyrrolate belongs to Respiratory.
Why it happens
Additive pharmacodynamic antimuscarinic effects.
What to do
Monitor for anticholinergic adverse effects, particularly urinary retention and constipation. Avoid the combination in patients with narrow-angle glaucoma or gastric retention.
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 Glycopyrrolate
- Glycopyrrolate + Potassium chloride Major
- Amitriptyline + Glycopyrrolate Moderate
- Atropine + Glycopyrrolate Moderate
- Bethanechol + Glycopyrrolate Moderate
- Chlorpromazine + Glycopyrrolate Moderate
- Clomipramine + Glycopyrrolate Moderate
Frequently asked questions
Can I take Darifenacin with Glycopyrrolate?
MediHelp rates the interaction as moderate. Darifenacin and Glycopyrrolate 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 combined use increases anticholinergic effects such as dry mouth, constipation, urinary retention, blurred vision and tachycardia. Older patients are particularly susceptible.
How serious is the interaction between Darifenacin and Glycopyrrolate?
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 adverse effects, particularly urinary retention and constipation. Avoid the combination in patients with narrow-angle glaucoma or gastric retention.
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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