Adults: Antiangina and Antiarrhythmia: 50 mg daily, may be increased to 100-200 mg daily.
Renal Function Impairment (creatinine clearance <15 mL/min/1.73 m2): Maximum Dose: 50 mg daily.
Antihypertension: 25 mg daily, dose may be increased to 50-100 mg daily.