Drug interactions
Chloroquine + Dofetilide
Severity: Contraindicated
Chloroquine and Dofetilide: contraindicated 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
Dofetilide strongly prolongs the QT interval and chloroquine adds further prolongation. The combination substantially increases the risk of torsades de pointes.
What this interaction means in plain words
Chloroquine and Dofetilide are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Chloroquine belongs to Anti Parasitic; Dofetilide belongs to Cardiovascular.
Why it happens
Additive QT prolongation via IKr (hERG) channel blockade.
What to do
Do not combine; select an alternative antimalarial or antiarrhythmic. If chloroquine is essential, dofetilide should be stopped with an appropriate washout and ECG monitoring.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Chloroquine
- Chloroquine + Cisapride Contraindicated
- Chloroquine + Dronedarone Contraindicated
- Chloroquine + Droperidol Contraindicated
- Chloroquine + Panobinostat Contraindicated
- Chloroquine + Pimozide Contraindicated
- Chloroquine + Quinidine Contraindicated
Other interactions of Dofetilide
- Amiodarone + Dofetilide Contraindicated
- Amisulpride + Dofetilide Contraindicated
- Amlodipine-hydrochlorothiazide-valsartan + Dofetilide Contraindicated
- Amlodipine-olmesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Candesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Captopril-hydrochlorothiazide + Dofetilide Contraindicated
Frequently asked questions
Can I take Chloroquine with Dofetilide?
MediHelp rates the interaction as contraindicated. Chloroquine and Dofetilide are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Dofetilide strongly prolongs the QT interval and chloroquine adds further prolongation. The combination substantially increases the risk of torsades de pointes.
How serious is the interaction between Chloroquine and Dofetilide?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not combine; select an alternative antimalarial or antiarrhythmic. If chloroquine is essential, dofetilide should be stopped with an appropriate washout and ECG monitoring.
What other medicines interact with Chloroquine?
MediHelp also lists interactions of Chloroquine with, for example, Cisapride, Dronedarone, Droperidol. The full list is on the Chloroquine page.
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