Which pharmacological class includes epinephrine and albuterol?

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Epinephrine and albuterol stimulate the sympathetic nervous system by activating adrenergic receptors. They are adrenergic agonists (sympathomimetics) because they mimic adrenaline’s action to turn on these receptors. Epinephrine is nonselective, hitting alpha and beta receptors to produce effects like bronchodilation and increased heart rate, while albuterol is a selective beta-2 agonist mainly causing bronchodilation with minimal cardiac impact. The other options describe drugs that block or counteract these actions: antihistamines block histamine receptors, cholinergic antagonists block acetylcholine signaling, and beta blockers dampen beta receptor activity. So the correct class is adrenergic agonists (sympathomimetics).