Drug interactions
Thioridazine + Vilanterol / fluticasone furoate inhaled
Severity: Major
Thioridazine and Vilanterol / fluticasone furoate inhaled: 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
Vilanterol can prolong QTc and increase heart rate, and thioridazine has strong QT-prolonging effects. Inhaled systemic exposure is low, but the combination may raise the risk of arrhythmia, particularly with low potassium.
What this interaction means in plain words
Thioridazine and Vilanterol / fluticasone furoate inhaled 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.
Why it happens
Additive QT prolongation and beta-agonist cardiac stimulation.
What to do
Use an alternative to thioridazine where possible. If combined, monitor ECG and potassium and watch for palpitations or syncope.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Thioridazine and Vilanterol / fluticasone furoate inhaled, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Thioridazine
- Abiraterone + Thioridazine Contraindicated
- Adagrasib + Thioridazine Contraindicated
- Amiodarone + Thioridazine Contraindicated
- Amisulpride + Thioridazine Contraindicated
- Amitriptyline + Thioridazine Contraindicated
- Amoxapine + Thioridazine Contraindicated
Frequently asked questions
Can I take Thioridazine with Vilanterol / fluticasone furoate inhaled?
MediHelp rates the interaction as major. Thioridazine and Vilanterol / fluticasone furoate inhaled 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. Vilanterol can prolong QTc and increase heart rate, and thioridazine has strong QT-prolonging effects. Inhaled systemic exposure is low, but the combination may raise the risk of arrhythmia, particularly with low potassium.
How serious is the interaction between Thioridazine and Vilanterol / fluticasone furoate inhaled?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use an alternative to thioridazine where possible. If combined, monitor ECG and potassium and watch for palpitations or syncope.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
