Drug interactions
Perphenazine + Propantheline
Severity: Moderate
Perphenazine and Propantheline: 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
Both agents have anticholinergic effects, so combined use can cause dry mouth, constipation, urinary retention, blurred vision, tachycardia and confusion. Reduced gut motility can also delay perphenazine absorption, and heat intolerance may occur.
What this interaction means in plain words
Perphenazine and Propantheline 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 effects with slowed gastrointestinal transit.
What to do
Monitor for anticholinergic toxicity, particularly in older patients and in hot environments. Reduce doses or choose an alternative if symptoms 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 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 Propantheline?
MediHelp rates the interaction as moderate. Perphenazine and Propantheline 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. Both agents have anticholinergic effects, so combined use can cause dry mouth, constipation, urinary retention, blurred vision, tachycardia and confusion. Reduced gut motility can also delay perphenazine absorption, and heat intolerance may occur.
How serious is the interaction between Perphenazine and Propantheline?
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, particularly in older patients and in hot environments. Reduce doses or choose an alternative if symptoms develop.
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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