Drug interactions
Thioridazine + Vorinostat
Severity: Contraindicated
Thioridazine and Vorinostat: contraindicated 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
Vorinostat has been associated with QT prolongation, and thioridazine markedly prolongs QTc. The combination may increase the risk of torsades de pointes, particularly with electrolyte disturbances common in oncology patients.
What this interaction means in plain words
Thioridazine and Vorinostat are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Thioridazine belongs to Central Nervous System; Vorinostat belongs to Oncology.
Why it happens
Additive effects on cardiac repolarization leading to QT prolongation.
What to do
Avoid combining; use an alternative antipsychotic. If vorinostat is essential, correct potassium and magnesium and do not use thioridazine.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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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 Vorinostat
Frequently asked questions
Can I take Thioridazine with Vorinostat?
MediHelp rates the interaction as contraindicated. Thioridazine and Vorinostat are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Vorinostat has been associated with QT prolongation, and thioridazine markedly prolongs QTc. The combination may increase the risk of torsades de pointes, particularly with electrolyte disturbances common in oncology patients.
How serious is the interaction between Thioridazine and Vorinostat?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combining; use an alternative antipsychotic. If vorinostat is essential, correct potassium and magnesium and do not use thioridazine.
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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