Comparison of oral indacrinone with furosemide.

The oral dose response and time course of action of indacrinone was compared with that of furosemide in six healthy men on a sodium and potassium-controlled diet. The single doses were 5, 10, 20, 40, and 80 mg indacrinone and 20, 40, and 80 mg furosemide. Diuretic, natriuretic, and kaliuretic effects revealed that indacrinone was more potent, had a longer duration of action, and induced a greater sodium for equivalent potassium loss during its period of peak activity than furosemide. During the 8 hr after drug, all doses of indacrinone decreased serum uric acid levels and increased uric acid clearance while furosemide generally increased serum uric acid and decreased uric acid clearance. After 24 hr, serum uric acid and uric acid clearance were the same for the two drugs. A rise in plasma renin activity was observed 2 hr after an 80-mg dose of furosemide but not after indacrinone.