Drug interactions
Fesoterodine + Risperidone
Severity: Minor
Fesoterodine 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
Combining these drugs may add to anticholinergic burden, producing constipation, dry mouth, urinary retention and confusion. Risperidone has weak antimuscarinic activity, so the effect is usually modest but may matter in frail or elderly patients.
What this interaction means in plain words
Fesoterodine 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.
Fesoterodine belongs to Genitourinary; Risperidone belongs to Central Nervous System.
Why it happens
Additive antimuscarinic effects; no clinically established pharmacokinetic interaction.
What to do
Monitor for anticholinergic symptoms, especially in elderly or cognitively impaired patients. Reduce the fesoterodine dose or switch if bothersome effects appear.
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?
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Other interactions of Fesoterodine
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 Fesoterodine with Risperidone?
MediHelp rates the interaction as minor. Fesoterodine 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. Combining these drugs may add to anticholinergic burden, producing constipation, dry mouth, urinary retention and confusion. Risperidone has weak antimuscarinic activity, so the effect is usually modest but may matter in frail or elderly patients.
How serious is the interaction between Fesoterodine 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 for anticholinergic symptoms, especially in elderly or cognitively impaired patients. Reduce the fesoterodine dose or switch if bothersome effects appear.
What other medicines interact with Fesoterodine?
MediHelp also lists interactions of Fesoterodine with, for example, Bethanechol, Clozapine, Levoketoconazole. The full list is on the Fesoterodine page.
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