Lisinopril Interactions

Most popular salt substitutes replace sodium chloride with potassium chloride, delivering a meaningful potassium load with every shake. Lisinopril, an ACE inhibitor, reduces the kidney's ability to excrete potassium. Used together, this combination has caused documented cases of life-threatening hyperkalemia, including emergencies requiring dialysis.

Lisinopril blocks the renin-angiotensin-aldosterone system, lowering aldosterone and reducing the kidneys' ability to excrete potassium. Adding a potassium supplement or potassium-based salt substitute on top can push blood potassium into a dangerous range (hyperkalemia), especially in older adults or people with reduced kidney function.

Glycyrrhizin in licorice mimics aldosterone, causing the kidneys to retain sodium and water and excrete potassium. This raises blood pressure and works against lisinopril's antihypertensive effect, while also lowering potassium, which can complicate cardiovascular risk.

Most salt substitutes replace sodium chloride with potassium chloride, making them a concentrated source of potassium. Lisinopril and other ACE inhibitors lower aldosterone and reduce the kidneys' ability to clear potassium. Used together, they can raise blood potassium to dangerous levels (hyperkalemia), especially in people with reduced kidney function, diabetes, older age, or who take other potassium-raising medicines.

Lisinopril is an ACE inhibitor that reduces aldosterone, so the kidneys hold onto more potassium and serum potassium tends to rise. A diet heavy in high-potassium foods like bananas can add to that load. For most people with normal kidneys this is a small, manageable effect; the risk of clinically meaningful hyperkalemia is greater in those with reduced kidney function, diabetes, heart failure, or who also take potassium-sparing diuretics, potassium supplements, or potassium-based salt substitutes.