Which agent is a non-selective beta-adrenergic agonist?

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Study for the INBDE Pharmacology Test. Sharpen your pharmacology knowledge with flashcards and multiple choice questions, each question is accompanied by hints and explanations. Prepare confidently for your exam!

Multiple Choice

Which agent is a non-selective beta-adrenergic agonist?

Explanation:
Non-selective beta-adrenergic agonists activate both beta-1 and beta-2 receptors, so they affect the heart (increasing rate and contractility) and the lungs (causing bronchodilation) simultaneously. This lack of receptor selectivity is the defining feature, distinguishing them from agents that are alpha-selective, beta-2 selective, or mixed alpha/beta. The term that fits this profile is the one described as a Non-Selective Beta Agonist, with isoproterenol being a classic example.

Non-selective beta-adrenergic agonists activate both beta-1 and beta-2 receptors, so they affect the heart (increasing rate and contractility) and the lungs (causing bronchodilation) simultaneously. This lack of receptor selectivity is the defining feature, distinguishing them from agents that are alpha-selective, beta-2 selective, or mixed alpha/beta. The term that fits this profile is the one described as a Non-Selective Beta Agonist, with isoproterenol being a classic example.

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