Drug interactions
Haloperidol + Solifenacin
Severity: Moderate
Haloperidol and Solifenacin: 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
Haloperidol prolongs the QT interval and has some anticholinergic effect, so combined with solifenacin it may raise arrhythmia risk and anticholinergic adverse effects such as constipation and urinary retention.
What this interaction means in plain words
Haloperidol and Solifenacin 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.
Haloperidol belongs to Central Nervous System; Solifenacin belongs to Genitourinary.
Why it happens
Additive QT prolongation and additive antimuscarinic effects.
What to do
Obtain a baseline ECG and correct potassium and magnesium. Monitor QTc and anticholinergic effects, and use the lowest effective haloperidol dose.
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 Solifenacin
Other interactions of Haloperidol
- Dofetilide + Haloperidol Contraindicated
- Dronedarone + Haloperidol Contraindicated
- Haloperidol + Ibutilide Contraindicated
- Haloperidol + Levoketoconazole Contraindicated
- Haloperidol + Panobinostat Contraindicated
- Haloperidol + Pimozide Contraindicated
Frequently asked questions
Can I take Haloperidol with Solifenacin?
MediHelp rates the interaction as moderate. Haloperidol and Solifenacin 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. Haloperidol prolongs the QT interval and has some anticholinergic effect, so combined with solifenacin it may raise arrhythmia risk and anticholinergic adverse effects such as constipation and urinary retention.
How serious is the interaction between Haloperidol and Solifenacin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and correct potassium and magnesium. Monitor QTc and anticholinergic effects, and use the lowest effective haloperidol dose.
What other medicines interact with Solifenacin?
MediHelp also lists interactions of Solifenacin with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Solifenacin page.
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