Drug interactions
Benperidol + Darifenacin
Severity: Moderate
Benperidol and Darifenacin: 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
Benperidol is an antipsychotic with limited anticholinergic activity, so combination with darifenacin may modestly increase antimuscarinic effects. Darifenacin's slowing of gut motility may also alter absorption, and both can cause cognitive adverse effects in elderly patients.
What this interaction means in plain words
Benperidol and Darifenacin 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
Additive muscarinic receptor antagonism.
What to do
Monitor for constipation, urinary retention and confusion, and adjust therapy in older or frail patients.
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 Benperidol with Darifenacin?
MediHelp rates the interaction as moderate. Benperidol and Darifenacin 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. Benperidol is an antipsychotic with limited anticholinergic activity, so combination with darifenacin may modestly increase antimuscarinic effects. Darifenacin's slowing of gut motility may also alter absorption, and both can cause cognitive adverse effects in elderly patients.
How serious is the interaction between Benperidol and Darifenacin?
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 constipation, urinary retention and confusion, and adjust therapy in older or frail patients.
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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