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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.
3 Alpha blockers. 4 Angiotensin II receptor antagonists. 5 Beta blocker. 6 Mixed alpha + beta blockers. 7 Calcium channel blockers. 8 Antimineralocorticoid.
The second group contains the alpha (α) adrenoreceptors. There are only α 1 and α 2 receptors. Adrenergic receptors are located near the heart, kidneys, lungs, and gastrointestinal tract. [1] There are also α-adreno receptors that are located on vascular smooth muscle. [2] Antagonists reduce or block the signals of agonists.
Alpha 1 blocker exerts its action on alpha-1 receptor, dilating the smooth muscles. [3] Alpha-1 receptor is a Gq type G-protein coupled receptor . [ 3 ] When it is activated, it will lead to activation of phospholipase C , raising the intracellular level of IP3 and DAG . [ 3 ]
Alpha 1 blockers cause vasodilation by relaxing smooth muscles that control blood vessel diameter, leading to lower blood pressure. [1] FDA-approved uses of these drugs include treating conditions like benign prostatic hyperplasia, hypertension, pheochromocytoma, extravasation management, and reversal of local anesthesia.
Alpha-1 blockers (108 P) Alpha-2 blockers (1 C, 67 P) Pages in category "Alpha blockers" The following 14 pages are in this category, out of 14 total.