Drug interactions
Arsenic trioxide + Solifenacin
Severity: Major
Arsenic trioxide and Solifenacin: major 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
Arsenic trioxide markedly prolongs the QT interval and can cause torsades de pointes. Solifenacin adds a further QT effect at higher exposures.
What this interaction means in plain words
Arsenic trioxide and Solifenacin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Arsenic trioxide belongs to Oncology; Solifenacin belongs to Genitourinary.
Why it happens
Additive prolongation of cardiac repolarization.
What to do
Avoid solifenacin during arsenic trioxide therapy and use a non-QT-prolonging alternative. If it cannot be avoided, monitor ECG and keep electrolytes normal.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Solifenacin
- Adagrasib + Solifenacin Major
- Amiodarone + Solifenacin Major
- Amisulpride + Solifenacin Major
- Anagrelide + Solifenacin Major
- Bedaquiline + Solifenacin Major
- Ceritinib + Solifenacin Major
Other interactions of Arsenic trioxide
- Amiodarone + Arsenic trioxide Contraindicated
- Amisulpride + Arsenic trioxide Contraindicated
- Arsenic trioxide + Clomipramine Contraindicated
- Arsenic trioxide + Dronedarone Contraindicated
- Arsenic trioxide + Fluphenazine Contraindicated
- Arsenic trioxide + Gemifloxacin Contraindicated
Frequently asked questions
Can I take Arsenic trioxide with Solifenacin?
MediHelp rates the interaction as major. Arsenic trioxide and Solifenacin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Arsenic trioxide markedly prolongs the QT interval and can cause torsades de pointes. Solifenacin adds a further QT effect at higher exposures.
How serious is the interaction between Arsenic trioxide and Solifenacin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid solifenacin during arsenic trioxide therapy and use a non-QT-prolonging alternative. If it cannot be avoided, monitor ECG and keep electrolytes normal.
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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