title: Effect of aerosol ipratropium bromide (SCH 1000) on sputum viscosity and volume in chronic bronchitis.
mesh_terms: D000336:Aerosols; D001286:Atropine Derivatives / Q000494:pharmacology*; D001991:Bronchitis / Q000503:physiopathology*; D006801:Humans; D009241:Ipratropium / Q000008:administration & dosage / Q000494:pharmacology*; D013183:Sputum / Q000187:drug effects*; D013997:Time Factors; D014783:Viscosity
chemical_list: D000336:Aerosols; D001286:Atropine Derivatives; D009241:Ipratropium