Adult & childn >12 yr HTN & dysrhythmias 50-100 mg daily as a single dose.
Angina 50 mg bd or 100 mg once daily.
MI 50 mg PO 15 min after IV dose. Followed by further 50 mg PO 12 hr later, then 24 hr later by 100 mg PO once daily for up to 10 days.
Severe renal impairment: CrCl 15-35 mL/min/1.73 m2 50 mg daily or 100 mg once every 2 days,
<15 mL/min/1.73 m2 50 mg on alternate days or 100 mg once every 4 days.