potassium
21 interactions related to potassium
losartan + potassium
Losartan blocks the angiotensin II receptor, lowering aldosterone and reducing renal potassium excretion in the same way ACE inhibitors do. Concurrent potassium supplementation can drive serum potassium into the hyperkalemic range, with cardiac arrhythmia risk in patients with kidney impairment, diabetes, or heart failure.
lisinopril + potassium
Lisinopril blocks the renin-angiotensin-aldosterone system, reducing aldosterone secretion and impairing the kidneys' ability to excrete potassium. Adding potassium supplements on top of this can push serum potassium into dangerous territory, especially in older adults or those with reduced kidney function.
hydrochlorothiazide + magnesium
Thiazide diuretics increase urinary magnesium excretion and roughly 1 in 5 long-term users develop hypomagnesemia. Low magnesium worsens the hypokalemia that thiazides also cause and can perpetuate refractory potassium depletion.
valsartan + spirulina
Spirulina has modest antihypertensive effects in clinical trials (systolic drop of around 4-5 mmHg) and contains roughly 14 mg of potassium per gram. Combined with valsartan, theoretical risks include additive blood pressure lowering and a minor contribution to potassium load, though at typical supplement doses neither effect is large.
prednisone + potassium
Prednisone has weak mineralocorticoid activity that promotes renal potassium excretion. Especially at higher doses or with prolonged use, this can cause hypokalemia, which presents as muscle weakness, fatigue, and potentially arrhythmias.
potassium + magnesium
Magnesium is required for the Na/K-ATPase pump that maintains intracellular potassium, so magnesium deficiency causes refractory potassium loss that cannot be corrected by potassium alone. Co-supplementation of the two minerals produces additive reductions in systolic blood pressure and supports normal cardiac rhythm.
spironolactone + potassium
Spironolactone is a mineralocorticoid receptor antagonist that blocks aldosterone-driven potassium excretion in the collecting duct, causing the kidneys to retain potassium. Adding a potassium supplement, salt substitute, or potassium-rich diet on top of spironolactone can produce fatal hyperkalemia, especially in patients with chronic kidney disease, heart failure, diabetes, or who are also on an ACE inhibitor or ARB.
hydrochlorothiazide + potassium
Hydrochlorothiazide promotes urinary potassium excretion at the distal convoluted tubule and is a leading cause of drug-induced hypokalemia. Many patients still develop low potassium despite supplementation, while some on combination antihypertensives risk the opposite problem if a potassium-sparing agent is added.
furosemide + potassium
Furosemide blocks the Na-K-2Cl cotransporter in the loop of Henle and is the most potent diuretic class for causing dose-dependent hypokalemia, affecting 25-36% of users. Supplementation or potassium-sparing co-therapy is frequently required, but uncontrolled dosing combined with ACE inhibitors or kidney disease can flip levels into hyperkalemia.
radish + ace inhibitors
Radish contains moderate amounts of dietary nitrate and potassium. Nitrate becomes nitric oxide and modestly relaxes blood vessels, while potassium adds to the elevated potassium levels that ACE inhibitors already cause. In normal food portions the effect is small, but very large or supplement-level intake can matter.
alcohol + hydrochlorothiazide
Hydrochlorothiazide and alcohol both lower blood pressure and promote dehydration; combined use causes additive hypotension, dizziness, and orthostatic syncope, especially on standing or in hot weather. The combination also worsens electrolyte loss, particularly potassium and magnesium.
alcohol + digoxin
Alcohol can precipitate atrial fibrillation and other arrhythmias that overlap with digoxin's narrow therapeutic window; concurrent diuretic-induced hypokalemia and hypomagnesemia, common in this population, sharply increase the risk of digoxin toxicity. Alcohol may also alter digoxin absorption and worsen heart failure that the drug is meant to treat.
licorice tea + digoxin
Licorice (Glycyrrhiza glabra) contains glycyrrhizin, which inhibits renal 11-beta-hydroxysteroid dehydrogenase type 2 and causes potassium loss through mineralocorticoid-like activity. The resulting hypokalemia sharply increases digoxin's binding to cardiac Na/K-ATPase, raising the risk of life-threatening digoxin toxicity and arrhythmia.
hibiscus tea + hydrochlorothiazide
Hibiscus (Hibiscus sabdariffa) has intrinsic diuretic and antihypertensive activity and animal studies show it increases serum levels of hydrochlorothiazide while reducing its clearance. The combination can produce additive blood pressure lowering and amplified electrolyte loss including hypokalemia.
oranges + ace inhibitors
Oranges and orange juice are high in potassium (about 240 mg per medium orange, 450-500 mg per cup of juice), and ACE inhibitors reduce aldosterone and renal potassium excretion. Heavy consumption of oranges or orange juice with ACE inhibitors can raise serum potassium, with greater risk in patients with reduced kidney function.
potatoes + ace inhibitors
Potatoes are very high in potassium (a medium baked potato with skin contains about 900 mg), and ACE inhibitors reduce aldosterone-mediated potassium excretion. Regular large servings of potatoes combined with ACE inhibitors can raise serum potassium, particularly in patients with chronic kidney disease, heart failure, or diabetes.
valsartan + potassium
Valsartan is an angiotensin II receptor blocker that suppresses aldosterone and slows renal potassium excretion. The FDA-approved Diovan label specifically warns that potassium supplements and potassium-containing salt substitutes may lead to clinically significant hyperkalemia, particularly in patients with renal impairment, diabetes, or heart failure.
bananas + spironolactone
Bananas are a high-potassium food (around 422 mg per medium banana), and spironolactone is a potassium-sparing diuretic that reduces renal potassium excretion. Combining high dietary potassium with spironolactone can cause hyperkalemia, which may trigger dangerous cardiac arrhythmias.
coconut water + spironolactone
Coconut water is naturally high in potassium (roughly 600 mg per cup) and is often consumed in large volumes for hydration. Spironolactone is a potassium-sparing diuretic that reduces renal potassium excretion. Regular high-volume coconut water consumption with spironolactone can cause hyperkalemia, including cases reported in the medical literature.
bananas + lisinopril
Lisinopril is an ACE inhibitor that reduces aldosterone and increases serum potassium. Combined with high dietary potassium from bananas and other potassium-rich foods, this can cause hyperkalemia, particularly in patients with reduced kidney function or those also taking potassium-sparing diuretics.
avocado + ace inhibitors
Avocados are a high-potassium food (about 487 mg per half avocado), and ACE inhibitors reduce aldosterone-driven potassium excretion. Frequent large servings of avocado combined with ACE inhibitors can contribute to hyperkalemia, especially in patients with kidney impairment or other potassium-raising medications.