Magnesium salicylate (NSAID)/caffeine. The gentle diuretic. Helps relieve: puffiness; menstrual bloat; water weight grain. Prompt, effective. Eliminates excess body water & related discomforts. Magnesium content: 20 mg/pill, calcium content: 10 mg/pill. The active ingredients in Diurex Water Pills have been recognized to be safe & effective by an FDA Expert Advisory Panel when used as directed.