title: When should a methacholine challenge be ordered for a patient with suspected asthma?
authors.affiliation: Department of Pulmonary, Allergy, and Critical Care Medicine, Cleveland Clinic, OH 44195, USA.
authors.forename: Edina
authors.initials: E
authors.lastname: Swartz
authors.forename: David
authors.initials: D
authors.lastname: Lang
mesh_terms: D001249:Asthma / Q000175:diagnosis* / Q000503:physiopathology; D016535:Bronchial Hyperreactivity; D001985:Bronchial Provocation Tests; D003937:Diagnosis, Differential; D006305:Health Status Indicators; D006801:Humans; D016210:Methacholine Chloride / Q000494:pharmacology*
chemical_list: D016210:Methacholine Chloride