Drug interactions
Conivaptan + Solifenacin
Severity: Moderate
Conivaptan 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
Conivaptan is a CYP3A4 inhibitor and may raise solifenacin exposure, increasing anticholinergic adverse effects and QT liability. Conivaptan is given only short term in hospital.
What this interaction means in plain words
Conivaptan 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.
Why it happens
Inhibition of CYP3A4-mediated metabolism of solifenacin.
What to do
Limit solifenacin to 5 mg daily or withhold it during conivaptan infusion, and monitor for anticholinergic effects and ECG changes.
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
Frequently asked questions
Can I take Conivaptan with Solifenacin?
MediHelp rates the interaction as moderate. Conivaptan 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. Conivaptan is a CYP3A4 inhibitor and may raise solifenacin exposure, increasing anticholinergic adverse effects and QT liability. Conivaptan is given only short term in hospital.
How serious is the interaction between Conivaptan 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: Limit solifenacin to 5 mg daily or withhold it during conivaptan infusion, and monitor for anticholinergic effects and ECG changes.
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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