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Related to Adrenergic antagonist: Adrenergic agonist


1. blocking transmission of impulses from the adrenergic (sympathetic) postganglionic fibers to effector organs or tissues, inhibiting such sympathetic functions as smooth muscle contraction and glandular secretion.
2. an agent that produces such an effect; called also antiadrenergic.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Antagonistic to the action of sympathetic or other adrenergic nerve fibers.
See also: sympatholytic.
Farlex Partner Medical Dictionary © Farlex 2012


Antagonistic to the action of sympathetic or other adrenergic nerve fibers.
See also: sympatholytic
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Treatment of post-traumatic stress disorders with the alpha-1 adrenergic antagonist prazosin: A review of outcome studies.
Thus, the rationale of using alpha 1 adrenergic antagonists in medical expulsion therapy lies in their capability to inhibit basal tone and peristaltic ureteral contractions, dilating the ureteral lumen and thereby increasing the fluid bolus volume facilitating stone passage down the ureter.2-4 It also acts on the C fibers blocking pain conduction.19 Of the available a1-blockers, Tamsulosin is chosen for this study as it is a combined a1A and a1D-selective adrenergic antagonist.
The position of QNB is very similar to that of retinal in rhosopsin and of carazolol ([beta] adrenergic antagonist) in [[beta].sub.2] adrenergic receptors (Fig.
Alpha-1 adrenergic antagonists are used to improve the urine flow in older men by relaxing the muscles in the bladder neck and prostatic smooth muscles (terazosin Hcl [Hytrin[R]]).
Weiss, "Interaction of alpha adrenergic antagonists with calmodulin," Life Sciences, vol.
Currently there are five major classes of medications that are used to lower the IOP including beta adrenergic antagonists, alpha adrenergic agonists, parasympathomimetics, prostaglandin analogues, and carbonic anhydrase inhibitors6,8.
[[alpha].sub.1] adrenergic antagonists have been shown to inhibit basal tone, peristaltic frequency, and ureteral contractions in the intramural part of the ureter.141 Recent studies have reported excellent results with the expulsion of distal ureteral calculi and the control of ureteric colic with medical management.
Beta blockers (beta adrenergic antagonists) have, since their first day of introduction, been recognized to cause asthma.
The same pattern has been seen with adrenergic antagonists: Propanolol was superior to placebo in reducing cocaine use and increasing treatment retention in patients with high but not low withdrawal severity, he said.