Posted: August 16th, 2017
Which of the following adrenergic inhibitors acts directly on the blood vessels, producing vasodilation?
a) Prazosin hydrochloride (Minipress)
Minipress is a peripheral vasodilator acting directly on the blood vessel. It is not used in angina and coronary artery disease, however, because it induces tachycardia if not preceded by administration of propranolol and a diuretic.
b) Reserpine (Serpasil)
Serpasil impairs synthesis and reuptake of norepinephrine.
c) Propranolol (Inderal)
Inderal blocks the beta-adrenergic receptors of the sympathetic nervous system, especially the sympathetics to the heart, producing a slower heart reate and lowered blood pressure.
d) Clonidine hydrochloride (Catapres)
Catapres acts through the central nervous system, apparently through centrally mediated alpha-adrenergic stimulation in the brain, producing blood pressure reduction.
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