A well-known asthmatic individual has been admitted to the ED complaining of difficulty breathing.The physician is asking for a bronchodilator.Which of the following agents should be considered?
I.β₂ agonists
II.Anticholinergics
III.Parasympathomimetics
IV.Sympathomimetics

Question

Quizplus · Accepted Answer

Sympathomimetic drugs, specifically β₂ agonists, are most commonly inhaled directly into the lungs to reverse the bronchoconstriction associated with asthma. A common example of such a drug is albuterol (Proventil). Parasympathetic or cholinergic stimulation is the major cause of bronchoconstriction; therefore, drugs that block cholinergic receptors (cholinergic antagonists or, more specifically, muscarinic antagonists) cause bronchodilation.

A Well-Known Asthmatic Individual Has Been Admitted to the ED