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adrenergic
(redirected from Alpha-agonist)

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
ad·re·ner·gic  (dr-nûrjk)
adj.
1. Activated by or capable of releasing epinephrine or an epinephrinelike substance, especially in the sympathetic nervous system: adrenergic nerve fibers.
2. Having physiological effects similar to those of epinephrine: an adrenergic drug.


adre·nergi·cal·ly adv.

adrenergic [ˌædrəˈnɜːdʒɪk]
adj
(Life Sciences & Allied Applications / Physiology) releasing or activated by adrenaline or an adrenaline-like substance
[adrenaline + Greek ergon work]

adrenergic  (dr-nûrjk)
1. Relating to a neuron or axon that is activated by or capable of releasing epinephrine or an epinephrine-like substance when a nerve impulse passes. The nerve endings of the sympathetic nervous system are adrenergic.
2. Having physiological effects similar to those of epinephrine, as certain drugs.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.adrenergic - drug that has the effects of epinephrineadrenergic - drug that has the effects of epinephrine
phenylephrine - a powerful vasoconstrictor used to dilate the pupils and relieve nasal congestion
phenylpropanolamine - an adrenergic drug used in many preparations to relieve allergic reactions or respiratory infections; "drugs containing phenylpropanolamine are being recalled"
pressor, vasoconstrictive, vasoconstrictor - any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure
Adj.1.adrenergic - relating to epinephrine (its release or action)


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When used with beta blockers such as propranolol, ephedra may enhance sympathomimetic effects on vasculature from unopposed alpha-agonist effects, thus increasing risk of hypertensive effects.
Over-the-counter antihistamines are the most commonly utilized medications in all age groups and alpha-agonists are the most frequently prescribed sleep medications.
 
 
 
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