title: The effects of nebulized albuterol on esophageal function in asthmatic patients.
abstract: OBJECTIVE
  Albuterol reduces lower esophageal sphincter (LES) pressure in normal volunteers, although the effects of albuterol on esophageal function in asthmatic patients are not known. The aim of this study was to evaluate the effects of nebulized albuterol on lower esophageal function in asthmatic patients. Symptoms and a methacholine challenge test were used to identify asthmatic patients who were then enrolled in a prospective, randomized, placebo-controlled, double-blinded, crossover trial. Changes in esophageal function in response to nebulized albuterol or placebo were evaluated over two sessions spaced 1 week apart.
  
  
  RESULTS
  Albuterol induced a dose-dependent drop in lower esophageal sphincter basal pressure with a threshold dose as low as 2.5 mg. Albuterol did not affect the amplitude of esophageal contractions.
  
  
  CONCLUSIONS
  Nebulized albuterol induces a dose-dependent reduction in LES basal pressure in asthmatic patients. These effects raise the possibility that gastroesophageal reflux may occur after bronchodilator therapy.
authors.affiliation: Section of Gastroenterology & Hepatology, Dartmouth-Hitchcock Medical Center, Area 4C, 1 Medical Center Drive, Lebanon, NH 03756, USA, brian.lacy@hitchcock.org
authors.forename: Brian E
authors.initials: BE
authors.lastname: Lacy
authors.forename: Carole
authors.initials: C
authors.lastname: Mathis
authors.forename: John
authors.initials: J
authors.lastname: DesBiens
authors.forename: Mark C
authors.initials: MC
authors.lastname: Liu
mesh_terms: D000328:Adult; D000420:Albuterol / Q000009:adverse effects / Q000494:pharmacology* / Q000627:therapeutic use; D001249:Asthma / Q000188:drug therapy / Q000503:physiopathology*; D001993:Bronchodilator Agents / Q000009:adverse effects / Q000494:pharmacology* / Q000627:therapeutic use; D018592:Cross-Over Studies; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D049630:Esophageal Sphincter, Lower / Q000187:drug effects* / Q000503:physiopathology*; D005260:Female; D005764:Gastroesophageal Reflux / Q000139:chemically induced / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009330:Nebulizers and Vaporizers; D011312:Pressure; D011446:Prospective Studies
chemical_list: D001993:Bronchodilator Agents; D000420:Albuterol