Ads
related to: what is phenoxybenzamine used for treating
Search results
Results From The WOW.Com Content Network
Typically, phenoxybenzamine is not used in the long term, as new receptors are made to upregulate alpha stimulation. The main limiting side-effects of alpha antagonists is that the baroreceptor reflex is disrupted and thus this can cause postural hypotension.
Phenoxybenzamine, a nonselective α 1 and α 2 blocker, has been used to treat pheochromocytoma. [21] This drug blocks the activity of epinephrine and norepinephrine by antagonizing the alpha receptors, thus decreasing vascular resistance, increasing vasodilation, and decreasing blood pressure overall.
In 1978, a successful alpha blocker, phenoxybenzamine was confirmed to be clinically beneficial through a randomized, placebo-controlled study. [22] It was the first alpha blocker which was used for treating Benign Prostatic Hyperplasia. [22]
Early treatment can reduce the amount of time you spend in pain, decrease future scarring, or speed up the healing process. Your doctor will most likely use these kinds of treatments to assist you:
Prazosin was a much better tolerated drug than phenoxybenzamine but the problem still remained that it lowered the blood pressure more than desired for a BPH treatment. [ 2 ] [ 8 ] Terazosin was the first long-lasting alpha 1 blocker approved by FDA to treat BPH.
Irreversible competitive antagonists like phenoxybenzamine do not dissociate from alpha-adrenergic receptors. It is used to block the activity of alpha receptors in sympathetic pathway and is used in the treatment of paroxysmal hypertension and sweating resulting from pheochromocytoma and benign prostate hyperplasia. [11]
The primary application for phentolamine is for the control of hypertensive emergencies, most notably due to pheochromocytoma. [5]It also has usefulness in the treatment of cocaine-induced cardiovascular complications, where one would generally avoid β-blockers (e.g. metoprolol), as they can cause unopposed α-adrenergic mediated coronary vasoconstriction, worsening myocardial ischemia and ...
Guanfacine, sold under the brand name Tenex (immediate-release) and Intuniv (extended-release) among others, is an oral alpha-2a agonist medication used to treat attention deficit hyperactivity disorder (ADHD) and high blood pressure. [3] [10] Common side effects include sleepiness, constipation, and dry mouth. [10]