It comes as a solution for injection, administered by healthcare providers into the vein or muscle.Dosage & When it is to be takenAdult: IV- The recommended dose is 2 to 5mg. Repeat if needed.When it is not to be taken (Contraindications)Contraindicated in patients with heart attack, fast heart rate, and hypersensitivity to this drug. Drug Name : Phentolamine Mesylate This medication is a reversal anesthesia used in dental procedures for anesthetizing soft tissues (lip and tongue). More info about Phentolamine Mesylate Trade Names/Brand Names of Phentolamine Mesylate India : Phentosol | Fentanor | Fentosol More info International : Rogitine, Phentolamine Mesylate