Drug	Initial daily dosage	Maximal daily dosage	Duration of action
Loop diuretics
Bumetanide (Bumex)	0.5 to 1.0 mg one or two times	10 mg	Four to six hours
Furosemide (Lasix)	20 to 40 mg one or two times	600 mg	Six to eight hours
Torsemide (Demadex)	10 to 20 mg once	200 mg	12 to 16 hours
Potassium-sparing diuretics
Amiloride (Midamor)	5 mg once	20 mg	24 hours
Spironolactone (Aldactone)	12.5 to 25 mg once	50 mg*	Two to three days
Triamterene (Dyrenium)	50 to 75 mg two times	200 mg	Seven to nine hours
Thiazide diuretics
Chlorothiazide (Diuril)	250 to 500 mg one or two times	1,000 mg	Six to 12 hours
Chlorthalidone (Hygroton)	12.5 to 25 mg once	100 mg	24 to 72 hours
Hydrochlorothiazide (Esidrix)	25 mg one or two times	200 mg	Six to 12 hours
Indapamide (Lozol)	2.5 mg once	5 mg	36 hours
Metolazone (Zaroxolyn)	2.5 mg once	20 mg	12 to 24 hours