IV infusion Administer as slow continuous infusion at 0.1 mg/mL conc. Infusion site should be changed every 12 hr if administered via peripheral vein.
BP reduction Initially 50 mL/hr (5 mg/hr). If desired BP reduction is not achieved at this dose, infusion rate may be increased by 25 mL/hr (2.5 mg/hr) 15 min for gradual BP reduction, or every 5 min for more rapid BP reduction, up to max of 150 mL/hr. Following achievement of BP goal in rapid BP reduction, the infusion rate should be decreased to 30 mL/hr (3 mg/hr).
Hypotension or tachycardia Infusion may be restarted at low doses eg, 30-50 mL/hr (3-5 mg/hr) & adjusted to maintain desired BP when BP has stabilized.