Drug interactions
Perphenazine + Trospium chloride
Severity: Moderate
Perphenazine 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
Perphenazine has anticholinergic properties, so combined use with trospium may increase dry mouth, constipation, urinary retention and blurred vision. The legacy hypoglycemia and absorption claims are not clinically supported.
What this interaction means in plain words
Perphenazine 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 peripheral antimuscarinic effects.
What to do
Monitor for anticholinergic effects such as constipation and urinary retention, and reduce doses or choose a less anticholinergic option if they 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 Perphenazine
- Ibutilide + Perphenazine Contraindicated
- Perphenazine + Pimozide Contraindicated
- Perphenazine + Thioridazine Contraindicated
- Adagrasib + Perphenazine Major
- Alfentanil + Perphenazine Major
- Amiodarone + Perphenazine Major
Frequently asked questions
Can I take Perphenazine with Trospium chloride?
MediHelp rates the interaction as moderate. Perphenazine 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. Perphenazine has anticholinergic properties, so combined use with trospium may increase dry mouth, constipation, urinary retention and blurred vision. The legacy hypoglycemia and absorption claims are not clinically supported.
How serious is the interaction between Perphenazine 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 effects such as constipation and urinary retention, and reduce doses or choose a less anticholinergic option if they become troublesome.
What other medicines interact with Perphenazine?
MediHelp also lists interactions of Perphenazine with, for example, Ibutilide, Pimozide, Thioridazine. The full list is on the Perphenazine page.
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