A client experiencing anaphylactic allergic reaction after eating peanuts. The client is ordered to receive epinephrine (Adrenalin). This medication is considered a nonspecific adrenergic receptor drug because it innervates ________ receptor sites.

A. Beta-adrenergic: While epinephrine does stimulate beta-adrenergic receptors to relax bronchial smooth muscle and improve airflow, it also affects other receptors. Limiting its classification to beta only does not capture its full range of action in anaphylaxis. B. Alpha-adrenergic: Epinephrine’s alpha-adrenergic effects cause vasoconstriction, which helps raise blood pressure and reduce edema. However, it also has important beta-adrenergic effects, so alpha stimulation alone is incomplete. C. Dopamine: Epinephrine does not act on dopamine receptors in the context of treating anaphylaxis. Dopamine receptor activity is unrelated to its primary emergency actions. D. Alpha and beta adrenergic: Epinephrine is nonspecific because it stimulates both alpha and beta receptors. Alpha stimulation increases vascular tone to counter hypotension and edema, while beta stimulation dilates bronchioles and increases cardiac output, making it the drug of choice for severe allergic reactions.