Drug interactions
Perphenazine + Triprolidine
Severity: Moderate
Perphenazine and Triprolidine: 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 drugs are sedating and have anticholinergic properties, so combined use can cause marked drowsiness and additive anticholinergic effects such as dry mouth, constipation, urinary retention and confusion. Older adults are most vulnerable.
What this interaction means in plain words
Perphenazine and Triprolidine 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 belongs to Central Nervous System; Triprolidine belongs to Respiratory.
Why it happens
Additive CNS depression and antimuscarinic effects from H1, dopamine and muscarinic receptor blockade.
What to do
Monitor for oversedation and anticholinergic toxicity, especially in older patients. Prefer a non-sedating antihistamine.
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 Triprolidine
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 Triprolidine?
MediHelp rates the interaction as moderate. Perphenazine and Triprolidine 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 drugs are sedating and have anticholinergic properties, so combined use can cause marked drowsiness and additive anticholinergic effects such as dry mouth, constipation, urinary retention and confusion. Older adults are most vulnerable.
How serious is the interaction between Perphenazine and Triprolidine?
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 oversedation and anticholinergic toxicity, especially in older patients. Prefer a non-sedating antihistamine.
What other medicines interact with Triprolidine?
MediHelp also lists interactions of Triprolidine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Triprolidine page.
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