Adults :
Hypertension Severe Hypertension & Hypertensive Crisis : Oral- 200-400 mg twice daily IV- 0.5-2 mg/minute by continous IV infusion.

Pediatric :
Hypertension Severe Hypertension & Hypertensive Crisis : Oral- 1.2g daily in 2 divided doses. IV- 0.25-3mg/kg per hour by continous IV infusion.

Renal Impairment : Dosage adjustment required in severe renal impairment.