Drug interactions
Ceritinib + Thioridazine
Severity: Contraindicated
Ceritinib and Thioridazine: 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
Both drugs prolong the QT interval, and ceritinib also causes bradycardia. Together they raise the risk of torsades de pointes.
What this interaction means in plain words
Ceritinib and Thioridazine 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.
Ceritinib belongs to Oncology; Thioridazine belongs to Central Nervous System.
Why it happens
Additive QT prolongation, with bradycardia from ceritinib increasing proarrhythmic risk.
What to do
Avoid the combination and use an alternative antipsychotic with low QT risk. If ceritinib cannot be changed, stop 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 Ceritinib
- Ceritinib + Cisapride Contraindicated
- Ceritinib + Eletriptan Contraindicated
- Ceritinib + Flibanserin Contraindicated
- Ceritinib + Pimozide Contraindicated
- Ceritinib + Tolvaptan Contraindicated
- Ado-trastuzumab + Ceritinib Major
Frequently asked questions
Can I take Ceritinib with Thioridazine?
MediHelp rates the interaction as contraindicated. Ceritinib and Thioridazine 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. Both drugs prolong the QT interval, and ceritinib also causes bradycardia. Together they raise the risk of torsades de pointes.
How serious is the interaction between Ceritinib and Thioridazine?
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 the combination and use an alternative antipsychotic with low QT risk. If ceritinib cannot be changed, stop 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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