Duovent--is logic enough?
D001286:Atropine Derivatives / Q000627:therapeutic use*; D004338:Drug Combinations / Q000627:therapeutic use; D004983:Ethanolamines / Q000627:therapeutic use*; D005280:Fenoterol / Q000627:therapeutic use*; D006801:Humans; D009241:Ipratropium / Q000627:therapeutic use*; D008173:Lung Diseases, Obstructive / Q000188:drug therapy*
D001286:Atropine Derivatives; D004338:Drug Combinations; D004983:Ethanolamines; C030809:fenoterol, ipratropium drug combination; D005280:Fenoterol; D009241:Ipratropium