In the presence of an Alpha-blocker, the administration of Epinephrine causes a decrease in blood pressure rather than an increase. This phenomenon is known as:
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Correct answer: Dale's Vasomotor Reversal
When Alpha-1 receptors (vasoconstriction) are blocked, the Beta-2 agonist properties (vasodilation) of Epinephrine are unopposed. This leads to a net peripheral vasodilation and a drop in blood pressure.
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