MAJOR — Use With Caution
FDA-documented interaction. Same electrolyte-mediated mechanism as loop diuretics. Monitor and supplement potassium.
Evidence level: STRONG
Hydrochlorothiazide (HCTZ) can lower your potassium levels, which makes digoxin more dangerous to your heart. Even normal digoxin levels can become toxic when potassium is low.
Same mechanism as furosemide — thiazide diuretics cause potassium depletion, increasing digoxin sensitivity. FDA digoxin label warns about diuretic-induced electrolyte disturbances.
Take potassium supplements as prescribed. Get regular blood tests. Eat potassium-rich foods. Report any nausea, vision changes, or irregular heartbeat.
Take Hydrochlorothiazide and Digoxin as prescribed by your healthcare provider. If both are taken daily, maintain consistent timing for each. Ask your pharmacist about optimal spacing — they have access to comprehensive interaction databases and can provide personalized timing guidance.
Poor dietary potassium, renal impairment, concurrent corticosteroids
Nausea, loss of appetite, visual changes (halos), slow or irregular heartbeat, weakness
Maintain potassium >4.0 mEq/L. Monitor electrolytes regularly. Consider adding spironolactone for potassium-sparing effect (also has heart failure benefits).
Discuss safer alternatives with your healthcare provider. They can recommend substitutions based on your specific health goals while minimizing interaction risks. Always bring a complete list of everything you take to your appointments.
Hydrochlorothiazide (HCTZ) can lower your potassium levels, which makes digoxin more dangerous to your heart. Even normal digoxin levels can become toxic when potassium is low.
Take Hydrochlorothiazide and Digoxin as prescribed by your healthcare provider. If both are taken daily, maintain consistent timing for each. Ask your pharmacist about optimal spacing — they have access to comprehensive interaction databases and can provide personalized timing guidance.
Nausea, loss of appetite, visual changes (halos), slow or irregular heartbeat, weakness
Discuss safer alternatives with your healthcare provider. They can recommend substitutions based on your specific health goals while minimizing interaction risks. Always bring a complete list of everything you take to your appointments.
Maintain potassium >4.0 mEq/L. Monitor electrolytes regularly. Consider adding spironolactone for potassium-sparing effect (also has heart failure benefits).
Or browse the full interaction database (121,000+ pairs).