Drug interactions
Thiothixene + Trospium
Severity: Moderate
Thiothixene and Trospium: 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
Thiothixene has some anticholinergic activity, so combining it with trospium can increase antimuscarinic effects such as dry mouth, constipation, urinary retention and confusion. Reduced gastrointestinal motility may also alter absorption of oral drugs.
What this interaction means in plain words
Thiothixene and Trospium 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 muscarinic receptor antagonism.
What to do
Monitor for anticholinergic adverse effects, especially in elderly patients, and adjust therapy if urinary retention, constipation or cognitive changes develop.
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 Trospium
- Clozapine + Trospium Major
- Pramlintide + Trospium Major
- Thioridazine + Trospium Major
- Trihexyphenidyl + Trospium Major
- Aclidinium + Trospium Moderate
- Amantadine + Trospium Moderate
Frequently asked questions
Can I take Thiothixene with Trospium?
MediHelp rates the interaction as moderate. Thiothixene and Trospium 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. Thiothixene has some anticholinergic activity, so combining it with trospium can increase antimuscarinic effects such as dry mouth, constipation, urinary retention and confusion. Reduced gastrointestinal motility may also alter absorption of oral drugs.
How serious is the interaction between Thiothixene and Trospium?
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, especially in elderly patients, and adjust therapy if urinary retention, constipation or cognitive changes develop.
What other medicines interact with Trospium?
MediHelp also lists interactions of Trospium with, for example, Clozapine, Pramlintide, Thioridazine. The full list is on the Trospium page.
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