Drug interactions
Oxybutynin + Risperidone
Severity: Minor
Oxybutynin and Risperidone: minor 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
Risperidone has weak anticholinergic activity, so with oxybutynin it may modestly add to dry mouth, constipation and urinary retention. Clinically significant effects are most likely in frail or elderly patients.
What this interaction means in plain words
Oxybutynin and Risperidone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Oxybutynin belongs to Genitourinary; Risperidone belongs to Central Nervous System.
Why it happens
Additive muscarinic receptor antagonism.
What to do
Monitor bowel and bladder function and cognition in older patients.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Oxybutynin and Risperidone, 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 14 days on the web. No card needed.
Other interactions of Oxybutynin
Other interactions of Risperidone
- Ibutilide + Risperidone Contraindicated
- Risperidone + Vandetanib Contraindicated
- Adagrasib + Risperidone Major
- Amiodarone + Risperidone Major
- Amisulpride + Risperidone Major
- Amoxapine + Risperidone Major
Frequently asked questions
Can I take Oxybutynin with Risperidone?
MediHelp rates the interaction as minor. Oxybutynin and Risperidone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Risperidone has weak anticholinergic activity, so with oxybutynin it may modestly add to dry mouth, constipation and urinary retention. Clinically significant effects are most likely in frail or elderly patients.
How serious is the interaction between Oxybutynin and Risperidone?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor bowel and bladder function and cognition in older patients.
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.
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.
