Drug interactions
Disopyramide + Topiramate
Severity: Minor
Disopyramide and Topiramate: minor 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
Disopyramide is metabolized in part by CYP3A4, so topiramate's weak enzyme induction may lower its levels and antiarrhythmic effect. The effect is likely modest, but disopyramide has a narrow therapeutic window.
What this interaction means in plain words
Disopyramide and Topiramate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Disopyramide belongs to Cardiovascular; Topiramate belongs to Central Nervous System.
Why it happens
Weak CYP3A4 induction by topiramate may increase disopyramide metabolism.
What to do
Monitor ECG and arrhythmia control when starting or stopping topiramate, and adjust the disopyramide dose to response or serum level.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Topiramate
Other interactions of Disopyramide
- Amisulpride + Disopyramide Contraindicated
- Desipramine + Disopyramide Contraindicated
- Disopyramide + Dronedarone Contraindicated
- Disopyramide + Itraconazole Contraindicated
- Disopyramide + Ketoconazole Contraindicated
- Disopyramide + Maprotiline Contraindicated
Frequently asked questions
Can I take Disopyramide with Topiramate?
MediHelp rates the interaction as minor. Disopyramide and Topiramate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Disopyramide is metabolized in part by CYP3A4, so topiramate's weak enzyme induction may lower its levels and antiarrhythmic effect. The effect is likely modest, but disopyramide has a narrow therapeutic window.
How serious is the interaction between Disopyramide and Topiramate?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor ECG and arrhythmia control when starting or stopping topiramate, and adjust the disopyramide dose to response or serum level.
What other medicines interact with Topiramate?
MediHelp also lists interactions of Topiramate with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Topiramate page.
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