Dofetilide and Hydrochlorothiazide: Drug Interaction Guide
Quick answer: This is a major interaction — avoid combining Dofetilide and Hydrochlorothiazide unless specifically directed by your doctor.
How Dofetilide interacts with Hydrochlorothiazide
Hydrochlorothiazide can inhibit renal cation transport involved in dofetilide clearance and may also cause hypokalemia. Increased dofetilide exposure and electrolyte disturbance raise torsades de pointes risk.
What you should do
Do not coadminister. Use an alternative antihypertensive or diuretic strategy and ensure potassium and magnesium are corrected before dofetilide therapy.
Key facts
Severity
Major — avoid combination
Mechanism
Hydrochlorothiazide can inhibit renal cation transport involved in dofetilide clearance and may also cause hypokalemia. ...
Action
Do not coadminister. Use an alternative antihypertensive or diuretic strategy and ensure potassium and magnesium are cor...
Frequently asked questions
Can I take Dofetilide and Hydrochlorothiazide together?
No — this combination should generally be avoided. Do not coadminister. Use an alternative antihypertensive or diuretic strategy and ensure potassium and magnesium are corrected before dofetilide therapy.
What is the severity of this interaction?
The interaction between Dofetilide and Hydrochlorothiazide is classified as Major — avoid combination. Hydrochlorothiazide can inhibit renal cation transport involved in dofetilide clearance and may also cause hypokalemia. Increased dofetilide exposure and electrolyte disturbance raise torsades de pointes risk.
What should I do if I'm prescribed both?
Do not coadminister. Use an alternative antihypertensive or diuretic strategy and ensure potassium and magnesium are corrected before dofetilide therapy. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.