(Dosage): HTN 80 or 160 mg once daily. May be increased to 320 mg daily or a diuretic may be added. Heart failure Initially 40 mg bid. May be increased to 80 & 160 mg bid. Max: 320 mg in divided doses. Post MI Start therapy as early as 12 hr post MI. Initially 20 mg bid, titrated to 40, 80 & 160 mg bid. Recommended to achieve 80 mg bid dose level 2 wk after initiation, & 160 mg bid (target max dose) by 3 mth.