Drug interactions
Darifenacin + Lofepramine
Severity: Moderate
Darifenacin and Lofepramine: 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 inhibits CYP2D6 and may increase tricyclic exposure, while both drugs have antimuscarinic activity. This may cause stronger dry mouth, constipation, urinary retention and cardiac effects.
What this interaction means in plain words
Darifenacin and Lofepramine 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.
Why it happens
CYP2D6 inhibition by darifenacin combined with additive antimuscarinic effects.
What to do
Monitor for anticholinergic and cardiac adverse effects and consider lowering lofepramine dose if symptoms occur.
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
Frequently asked questions
Can I take Darifenacin with Lofepramine?
MediHelp rates the interaction as moderate. Darifenacin and Lofepramine 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 inhibits CYP2D6 and may increase tricyclic exposure, while both drugs have antimuscarinic activity. This may cause stronger dry mouth, constipation, urinary retention and cardiac effects.
How serious is the interaction between Darifenacin and Lofepramine?
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 and cardiac adverse effects and consider lowering lofepramine dose if symptoms occur.
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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