Potassium-sparing diuretic (water pill)
Last reviewed April 2026
Who is this for?
Spironolactone is a water pill (diuretic) that helps your body get rid of extra water and salt while keeping potassium levels from dropping too low — it works by blocking a hormone called aldosterone that normally makes your body hold onto salt and water.
Prescription Required
You need a doctor's prescription to buy this drug.
Explore this drug