Drug interactions
Toremifene + Umeclidinium-vilanterol
Severity: Major
Toremifene and Umeclidinium-vilanterol: 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
Toremifene causes dose-dependent QT prolongation and vilanterol can add to this effect and lower potassium. The combination may increase the risk of torsades de pointes.
What this interaction means in plain words
Toremifene and Umeclidinium-vilanterol 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.
Toremifene belongs to Endocrine; Umeclidinium-vilanterol belongs to Respiratory.
Why it happens
Additive QT prolongation, with beta-2 agonist-associated hypokalemia.
What to do
Avoid if possible; if used, correct potassium and magnesium and monitor ECG. Choose another bronchodilator when feasible.
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 Toremifene and Umeclidinium-vilanterol, 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 Umeclidinium-vilanterol
Other interactions of Toremifene
- Amiodarone + Toremifene Contraindicated
- Dronedarone + Toremifene Contraindicated
- Nilotinib + Toremifene Contraindicated
- Pimozide + Toremifene Contraindicated
- Quinidine + Toremifene Contraindicated
- Ribociclib + Toremifene Contraindicated
Frequently asked questions
Can I take Toremifene with Umeclidinium-vilanterol?
MediHelp rates the interaction as major. Toremifene and Umeclidinium-vilanterol 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. Toremifene causes dose-dependent QT prolongation and vilanterol can add to this effect and lower potassium. The combination may increase the risk of torsades de pointes.
How serious is the interaction between Toremifene and Umeclidinium-vilanterol?
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 if possible; if used, correct potassium and magnesium and monitor ECG. Choose another bronchodilator when feasible.
What other medicines interact with Umeclidinium-vilanterol?
MediHelp also lists interactions of Umeclidinium-vilanterol with, for example, Aclidinium, Amiodarone, Amitriptyline. The full list is on the Umeclidinium-vilanterol 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.
