HTN 50 mg, may be increased to 100 mg/day once or in 2 divided doses. 
Diabetic nephropathy Initially 50 mg/day, may be increased to 100 mg. 
Patient w/ hepatic impairment Initially 25 mg. 
Elderly w/o hepatic insufficiency 50 mg daily, may be increased to 100 mg/day in 2 divided doses. 
Moderate to severe renal impairment, intravascular or salt depletion 25 mg/day.