The gentle diuretic. Bloat, puffiness, water weight gain, related discomforts. Caffeine free. Helps reduce excess body water and relieve related menstrual discomforts. America's No. 1 OTC diuretic (Based on independent syndicated market research data). Extended relief (Relief extends for up to 6 hours). Lose excess body water. Doctor recommended. The bloat medicine. The active ingredient In Diurex Water Capsules has been recognized to be safe and effective by an FDA expert advisory panel when used as directed.