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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 norepinephrine being the highest affinity.
Overflow incontinence may also be a side effect of certain medications. The term overflow incontinence is also used in fecal incontinence, and refers to the situation where there is a large mass of feces in the rectum (fecal loading), which may become hardened (fecal impaction). Liquid stool elements can pass around the obstruction, leading to ...
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]
Lofexidine, sold under the brand name Lucemyra among others, [1] is a medication historically used to treat high blood pressure; today, it is more commonly used to help with the physical symptoms of opioid withdrawal. [2] It is taken by mouth. [3] It is an α 2A-adrenergic receptor agonist. [3]
It is weaker than clonidine in producing hypotension and sedation, has weaker pre-synaptic actions on the α 2A-adrenergic receptor than clonidine (10-fold less effective in decreasing locus coeruleus activity and norepinephrine release), and may have greater efficacy in activating post-synaptic α 2A-adrenergic receptors (as suggested by ...
The mechanisms of sympathomimetic drugs can be direct-acting (direct interaction between drug and receptor), such as α-adrenergic agonists, β-adrenergic agonists, and dopaminergic agonists; or indirect-acting (interaction not between drug and receptor), such as MAOIs, COMT inhibitors, release stimulants, and reuptake inhibitors that increase the levels of endogenous catecholamines.