Potassium chloride is a mineral salt that provides potassium, an essential electrolyte. Your body uses potassium to conduct nerve impulses, trigger muscle contractions, and maintain a steady heartbeat.
You might take potassium chloride if your diet lacks potassium-rich foods or if a medication like a diuretic lowers your levels. Swallow the tablet or capsule with food and a full glass of water to reduce stomach irritation.
Do not use potassium supplements without medical guidance if you have kidney disease or take certain blood pressure or heart medications. Too much potassium, a condition called hyperkalemia, can cause dangerous heart rhythm problems.