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Clonidine, sold under the brand name Catapres among others, is an α 2A-adrenergic receptor agonist [12] medication used to treat high blood pressure, ADHD, drug withdrawal (e.g., alcohol, opioids, or nicotine), menopausal flushing, diarrhea, spasticity, and certain pain conditions. [13] The drug is often prescribed off-label for tics.
Many tricyclic antidepressants, tetracyclic antidepressants, antipsychotics, ergolines, and some piperazines like buspirone, trazodone, nefazodone, etoperidone, and mepiprazole antagonize α 1-adrenergic receptors as well, which contributes to their side effects such as orthostatic hypotension.
The alpha-2 blocker acts on alpha-2 receptors. The alpha-2 receptor is a G-protein coupled receptor as well, which exert its action by Gi function, leading to an inhibition of adenylyl cyclase and thus reducing synthesis of cAMP. [3] It lowers the amount of calcium inside the cell. [3]
In non-human species this is an immobilizing and anesthetic drug, presumptively also mediated by α 2 adrenergic receptors because it is reversed by yohimbine, an α 2 antagonist. α 2A selective agonists include guanfacine (an antihypertensive) and brimonidine (UK 14,304). -3-nitrobiphenyline is an α 2C selective agonist as well as being a ...
The alpha-adrenergic receptor has two subclasses α 1 and α 2. Alpha 2 receptors are associated with sympatholytic properties. Alpha-adrenergic agonists have the opposite function of alpha blockers. Alpha adrenoreceptor ligands mimic the action of epinephrine and norepinephrine signaling in the heart, smooth muscle and central nervous system, with
This is the first class of non-opioid pain medication approved to treat moderate to severe acute pain approved by the FDA in more than 20 years. The U.S. Food and Drug Administration (FDA) on ...
Alpha-2 adrenergic agonists such as clonidine are traditionally used to treat hypertension via inhibition of norepinephrine release. [17] Central alpha-2 adrenergic activation in the locus ceruleus and spinal cord induce sedation and pain modulation respectively. [17] Clonidine has been shown to have some efficacy when treating both acute and ...
Pages in category "Alpha-2 adrenergic receptor agonists" The following 43 pages are in this category, out of 43 total. This list may not reflect recent changes .