Angina pectoris, Heart failure, Post-myocardial infarction
Adult: 2-4 mg as a single dose; 2 mg may be repeated at intervals of at least 2 hr if necessary. Max: 40 mg daily. Infusions may be employed at a rate of up to 3 mg/hr.
Oral
Angina pectoris, Heart failure, Post-myocardial infarction
Adult: 1-4 mg 2-4 times daily.