Drug interactions
Encorafenib + Thioridazine
Severity: Major
Encorafenib and Thioridazine: major interaction.
Last updated Sources: US FDA label
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
Encorafenib causes dose-dependent QT prolongation, and thioridazine is a strong QT-prolonging drug. The combination raises the risk of torsades de pointes and sudden cardiac death.
What this interaction means in plain words
Encorafenib and Thioridazine 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.
Encorafenib belongs to Oncology; Thioridazine belongs to Central Nervous System.
Why it happens
Additive QT interval prolongation.
What to do
Avoid the combination and use an alternative antipsychotic. If it is essential, monitor ECG and electrolytes, and reduce or hold encorafenib if QTc rises markedly.
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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References
Other interactions of Thioridazine
- Abiraterone + Thioridazine Contraindicated
- Adagrasib + Thioridazine Contraindicated
- Amiodarone + Thioridazine Contraindicated
- Amisulpride + Thioridazine Contraindicated
- Amitriptyline + Thioridazine Contraindicated
- Amoxapine + Thioridazine Contraindicated
Other interactions of Encorafenib
Frequently asked questions
Can I take Encorafenib with Thioridazine?
MediHelp rates the interaction as major. Encorafenib and Thioridazine 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. Encorafenib causes dose-dependent QT prolongation, and thioridazine is a strong QT-prolonging drug. The combination raises the risk of torsades de pointes and sudden cardiac death.
How serious is the interaction between Encorafenib and Thioridazine?
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 the combination and use an alternative antipsychotic. If it is essential, monitor ECG and electrolytes, and reduce or hold encorafenib if QTc rises markedly.
What other medicines interact with Thioridazine?
MediHelp also lists interactions of Thioridazine with, for example, Abiraterone, Adagrasib, Amiodarone. The full list is on the Thioridazine page.
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