VPT-0071
QUESTION
Dale’s vasomotor reversal is exhibited by?
OPTIONS
(A) Isoproterenol
(B) Norepinephrine
(C) Epinephrine
(D) Dopamine
ANSWER
(C) Epinephrine
EXPLANATION
Epinephrine exhibits Dale’s vasomotor reversal after alpha-adrenergic blockade: its beta2-mediated vasodilation becomes dominant and the blood-pressure response reverses. Isoproterenol, norepinephrine, and dopamine do not produce the classic Dale reversal described here.
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Veterinary Pharmacology and Toxicology · 167 Questions
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