Furosemide is a diuretic used to treat fluid retention (edema) in dogs and cats with congestive heart failure, liver disease, or certain kidney disease. Furosemide is also used to treat high blood pressure. Furosemide for dogs and cats requires a prescription from your veterinarian, and is sold by the tablet.
Spironolactone is a potassium sparing diuretic used in the treatment of congestive heart failure (CHF), edema and high blood pressure (hypertension). Spironolactone is also used to treat potassium deficiency and hyperaldosteronism. Spironolactone requires a prescription from your veterinarian.