Alpha blocker

Alpha blockers
α-blockers
Drug class
Class identifiers
Use • Hypertension
 • Vasoconstriction
 • BPH
 • Raynaud's Disease
 • Pheochromocytoma
 • CHF
 • Erectile Dysfunction
Mechanism of action • Receptor antagonist
 • Inverse agonist
 • Neutral antagonist
Biological targetα-adrenoceptors
Legal status
In Wikidata
Specific locations and functions of the α receptors. Image from Basic and Clinical Pharmacology by Bertram Katzung, et al.[1]

Alpha blockers, also known as α-blockers or α-adrenoreceptor antagonists, are a class of pharmacological agents that act as antagonists on α-adrenergic receptors (α-adrenoceptors).[2]

Historically, alpha-blockers were used as a tool for pharmacologic research to develop a greater understanding of the autonomic nervous system. Using alpha blockers, scientists began characterizing arterial blood pressure and central vasomotor control in the autonomic nervous system.[3] Today, they can be used as clinical treatments for a limited number of diseases.[2]

Alpha blockers can treat a small range of diseases such as hypertension, Raynaud's disease, benign prostatic hyperplasia (BPH) and erectile dysfunction.[2] Generally speaking, these treatments function by binding an α-blocker to α receptors in the arteries and smooth muscle. Ultimately, depending on the type of alpha receptor, this relaxes the smooth muscle or blood vessels, which increases fluid flow in these entities.[2]

  1. ^ Katzung B (1987). Basic and Clinical Pharmacology. Appleton & Lange. ISBN 9780838505533.
  2. ^ a b c d Katzung B, Masters S (2013). Basic and Clinical Pharmacology. Lange. ISBN 978-0-07-176402-5.
  3. ^ Bousquet P, Schwartz J (May 1983). "Alpha-adrenergic drugs. Pharmacological tools for the study of the central vasomotor control". Biochemical Pharmacology. 32 (9): 1459–1465. doi:10.1016/0006-2952(83)90466-5. PMID 6134533.