<unk>  is primarily used to diagnose bronchial hyperreactivity, which is the hallmark of asthma and also occurs in chronic obstructive pulmonary disease. This is accomplished through the bronchial challenge test, or<unk>  challenge, in which a subject inhales aerosolized<unk> , leading to bronchoconstriction. Other therapeutic uses are limited by its adverse cardiovascular effects, such as bradycardia and hypotension, which arise from its function as a cholinomimetic.
Methacholine
Bromethalin
Theobromine
Dicycloverine
Glycopyrronium bromide
Allergan
Acetyl chloride
Guaifenesin