title: In smokers with mild airway disease, quitting slows decline in lung function. Ipratropium offers no lasting benefit.
mesh_terms: D006801:Humans; D009241:Ipratropium / Q000627:therapeutic use; D008173:Lung Diseases, Obstructive / Q000188:drug therapy / Q000503:physiopathology*; D012129:Respiratory Function Tests; D012907:Smoking; D016540:Smoking Cessation
chemical_list: D009241:Ipratropium