SR cap Angina, essential HTN, adjunct in the management of CHF & cerebrovascular disorders 1-2 cap daily. Amp Stable angina Initially 0.6 mg/hr infused continuously for 30-60 min. May be increased by up to 0.5 mg/hr every 15 min to a max of 4 mg/hr. Severe HTN, hypertensive crisis, urgency, pre-, peri-, post-op HTN Inj conc 0.1-0.2 mg/mL at 2-10 mcg/kg body wt/min.