Also found in: Dictionary, Thesaurus, Wikipedia.
a potent alpha-adrenergic blocking agent that blocks the hypertensive action of epinephrine and norepinephrine and most responses of smooth muscles that involve alpha-adrenergic receptors. Its mesylate salt is used intravenously or intramuscularly to prevent and treat hypertension occurring before and during surgery for pheochromocytoma and is also used intravenously to prevent and treat cutaneous necrosis and sloughing when extravasation of norepinephrine occurs after intravenous administration.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
An alpha-blocker, C17H19N3O, used especially in the diagnosis and treatment of pheochromocytoma.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
phentolamineAn alpha-ADRENERGIC BLOCKING DRUG used in the treatment of PHAEOCHROMOCYTOMA. A brand name is Rogitine.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005