Drug interactions
Thioridazine + Trospium chloride
Severity: Moderate
Thioridazine and Trospium chloride: 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
Thioridazine has substantial anticholinergic activity, so with trospium it can cause additive effects such as dry mouth, constipation, urinary retention, blurred vision and confusion. Older patients are especially susceptible.
What this interaction means in plain words
Thioridazine and Trospium chloride 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 pharmacodynamic effects.
What to do
Monitor for anticholinergic toxicity, including urinary retention, constipation and cognitive changes. Reduce the dose or choose an alternative if effects become troublesome.
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 Thioridazine
- Abiraterone + Thioridazine Contraindicated
- Adagrasib + Thioridazine Contraindicated
- Amiodarone + Thioridazine Contraindicated
- Amisulpride + Thioridazine Contraindicated
- Amitriptyline + Thioridazine Contraindicated
- Amoxapine + Thioridazine Contraindicated
Frequently asked questions
Can I take Thioridazine with Trospium chloride?
MediHelp rates the interaction as moderate. Thioridazine and Trospium chloride 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. Thioridazine has substantial anticholinergic activity, so with trospium it can cause additive effects such as dry mouth, constipation, urinary retention, blurred vision and confusion. Older patients are especially susceptible.
How serious is the interaction between Thioridazine and Trospium chloride?
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 toxicity, including urinary retention, constipation and cognitive changes. Reduce the dose or choose an alternative if effects become troublesome.
What other medicines interact with Thioridazine?
MediHelp also lists interactions of Thioridazine with, for example, Abiraterone, Adagrasib, Amiodarone. The full list is on the Thioridazine page.
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