Drug interactions
Perphenazine + Solifenacin
Severity: Moderate
Perphenazine and Solifenacin: 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 its own anticholinergic activity, so combined use may add to dry mouth, constipation, urinary retention, blurred vision and confusion. Both agents can also prolong the QT interval, which adds a cardiac concern, especially in older patients.
What this interaction means in plain words
Perphenazine and Solifenacin 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; Solifenacin belongs to Genitourinary.
Why it happens
Additive antimuscarinic effects and additive QT prolongation.
What to do
Monitor for anticholinergic toxicity such as constipation, urinary retention and cognitive changes, and check the ECG in patients with cardiac risk factors. Reduce the dose or choose a non-anticholinergic alternative if adverse effects 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 Solifenacin
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 Solifenacin?
MediHelp rates the interaction as moderate. Perphenazine and Solifenacin 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 its own anticholinergic activity, so combined use may add to dry mouth, constipation, urinary retention, blurred vision and confusion. Both agents can also prolong the QT interval, which adds a cardiac concern, especially in older patients.
How serious is the interaction between Perphenazine and Solifenacin?
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 such as constipation, urinary retention and cognitive changes, and check the ECG in patients with cardiac risk factors. Reduce the dose or choose a non-anticholinergic alternative if adverse effects develop.
What other medicines interact with Solifenacin?
MediHelp also lists interactions of Solifenacin with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Solifenacin page.
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