Epinephrine 1:1000 belongs to which drug class?

• A. Cholinergic agonist
• B. Sympathomimetic
• C. Beta-blocker
• D. Opioid agonist

Answer: (B)

Epinephrine 1:1000 is a sympathomimetic, i.e., an adrenergic agonist. It activates alpha and beta adrenergic receptors, producing effects like vasoconstriction (alpha) and bronchodilation plus increased heart rate and contractility (beta). This combination makes it ideal for emergencies such as anaphylaxis and airway compromise. It isn’t a cholinergic agonist (which would stimulate the parasympathetic system), it isn’t a beta-blocker (which would block beta receptors), and it isn’t an opioid agonist (which acts on opioid receptors).