User:Mr. Ibrahem/Phentolamine

Phentolamine, sold under the brand name Regitine among others, is a medication used to treat high blood pressure in pheochromocytoma, following norepinephrine entry into soft tissues, and hypertensive emergencies. It is given by injection. When injected into a vein effects occur within 2 minutes and last up to 30 minutes.

Common side effects include abdominal pain, nausea, diarrhea, flushing, stuffy nose, and low blood pressure with standing. Other side effects may include myocardial infarction and priapism. Safety in pregnancy is unclear. It is a alpha blocker.

Phentolamine was approved for medical use in the United States in 1952. In the United States it costs about 460 USD per dose as of 2021. In the United Kingdom it is available together with aviptadil for the treatment of erectile dysfunction.