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Usual Dose: 50 mg once daily.
The dose may be increased, if necessary, to 100 mg daily as a single dose or in 2 divided doses.
Elderly (>75 years) and Patients with Moderate to Severe Renal Impairment (Creatinine Clearance <20 mL/min): Initial Dose: 25 mg daily.
Intravascular Fluid Depletion: Initial Dose: 25 mg daily.
