Drug interactions
Asenapine transdermal + Dolasetron
Severity: Major
Asenapine transdermal and Dolasetron: 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
Asenapine is associated with QT prolongation, and dolasetron prolongs the QT interval as well. Concurrent use may increase the risk of ventricular arrhythmia, particularly in patients with other risk factors.
What this interaction means in plain words
Asenapine transdermal and Dolasetron 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 prolongation of cardiac repolarization.
What to do
Prefer a different antiemetic. If co-use is needed, obtain a baseline ECG, correct potassium and magnesium, and monitor 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?
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Other interactions of Dolasetron
- Apomorphine + Dolasetron Contraindicated
- Dofetilide + Dolasetron Contraindicated
- Dolasetron + Ibutilide Contraindicated
- Dolasetron + Pimozide Contraindicated
- Dolasetron + Thioridazine Contraindicated
- Dolasetron + Vandetanib Contraindicated
Frequently asked questions
Can I take Asenapine transdermal with Dolasetron?
MediHelp rates the interaction as major. Asenapine transdermal and Dolasetron 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 is associated with QT prolongation, and dolasetron prolongs the QT interval as well. Concurrent use may increase the risk of ventricular arrhythmia, particularly in patients with other risk factors.
How serious is the interaction between Asenapine transdermal and Dolasetron?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer a different antiemetic. If co-use is needed, obtain a baseline ECG, correct potassium and magnesium, and monitor for palpitations or syncope.
What other medicines interact with Dolasetron?
MediHelp also lists interactions of Dolasetron with, for example, Apomorphine, Dofetilide, Ibutilide. The full list is on the Dolasetron page.
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