Drug interactions
Asenapine + Toremifene
Severity: Major
Asenapine and Toremifene: 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 prolongs the QT interval in a dose-dependent way and carries a labeled warning for use with other QT-prolonging drugs. Asenapine adds to the risk of torsade de pointes.
What this interaction means in plain words
Asenapine and Toremifene 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.
Asenapine belongs to Central Nervous System; Toremifene belongs to Endocrine.
Why it happens
Additive QT prolongation.
What to do
Avoid combining; if it cannot be avoided, obtain ECGs and monitor electrolytes, especially in high-risk patients. Consider an alternative antipsychotic.
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 Asenapine
- Asenapine + Pimozide Contraindicated
- Asenapine + Thioridazine Contraindicated
- Asenapine + Vandetanib Contraindicated
- Adagrasib + Asenapine Major
- Alfentanil + Asenapine Major
- Alfuzosin + Asenapine Major
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 Asenapine with Toremifene?
MediHelp rates the interaction as major. Asenapine and Toremifene 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 prolongs the QT interval in a dose-dependent way and carries a labeled warning for use with other QT-prolonging drugs. Asenapine adds to the risk of torsade de pointes.
How serious is the interaction between Asenapine and Toremifene?
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 combining; if it cannot be avoided, obtain ECGs and monitor electrolytes, especially in high-risk patients. Consider an alternative antipsychotic.
What other medicines interact with Asenapine?
MediHelp also lists interactions of Asenapine with, for example, Pimozide, Thioridazine, Vandetanib. The full list is on the Asenapine page.
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