Drug interactions
Benperidol + Oxybutynin
Severity: Moderate
Benperidol and Oxybutynin: 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 has antimuscarinic properties and combined use with oxybutynin may increase anticholinergic effects such as confusion, constipation and urinary retention. Anticholinergics are also used to treat antipsychotic extrapyramidal effects, so effects overlap but may add to burden.
What this interaction means in plain words
Benperidol and Oxybutynin 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 antimuscarinic effects; anticholinergics may also modestly reduce oral antipsychotic absorption.
What to do
Monitor for anticholinergic adverse effects and cognitive changes, and watch for loss of antipsychotic control.
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 Oxybutynin
Frequently asked questions
Can I take Benperidol with Oxybutynin?
MediHelp rates the interaction as moderate. Benperidol and Oxybutynin 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 has antimuscarinic properties and combined use with oxybutynin may increase anticholinergic effects such as confusion, constipation and urinary retention. Anticholinergics are also used to treat antipsychotic extrapyramidal effects, so effects overlap but may add to burden.
How serious is the interaction between Benperidol and Oxybutynin?
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 and cognitive changes, and watch for loss of antipsychotic control.
What other medicines interact with Oxybutynin?
MediHelp also lists interactions of Oxybutynin with, for example, Bethanechol, Clozapine, Potassium chloride. The full list is on the Oxybutynin page.
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