Drug interactions
Pasireotide + Thioridazine
Severity: Major
Pasireotide and Thioridazine: 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
Pasireotide can prolong the QT interval and cause bradycardia, and thioridazine also strongly prolongs the QT interval. The combination raises the risk of torsades de pointes.
What this interaction means in plain words
Pasireotide 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.
Pasireotide belongs to Endocrine; Thioridazine belongs to Central Nervous System.
Why it happens
Additive QT prolongation, with pasireotide-related bradycardia.
What to do
Avoid the combination where possible and use an alternative antipsychotic. If both are required, obtain a baseline ECG, correct electrolytes and monitor the QTc.
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 Thioridazine
- Abiraterone + Thioridazine Contraindicated
- Adagrasib + Thioridazine Contraindicated
- Amiodarone + Thioridazine Contraindicated
- Amisulpride + Thioridazine Contraindicated
- Amitriptyline + Thioridazine Contraindicated
- Amoxapine + Thioridazine Contraindicated
Other interactions of Pasireotide
- Dronedarone + Pasireotide Contraindicated
- Pasireotide + Pimozide Contraindicated
- Amiodarone + Pasireotide Major
- Amisulpride + Pasireotide Major
- Amitriptyline + Pasireotide Major
- Anagrelide + Pasireotide Major
Frequently asked questions
Can I take Pasireotide with Thioridazine?
MediHelp rates the interaction as major. Pasireotide 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. Pasireotide can prolong the QT interval and cause bradycardia, and thioridazine also strongly prolongs the QT interval. The combination raises the risk of torsades de pointes.
How serious is the interaction between Pasireotide 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 where possible and use an alternative antipsychotic. If both are required, obtain a baseline ECG, correct electrolytes and monitor the QTc.
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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