title: Experiences with various preparations of ephedrine theophylline combination in chronic obstructive pulmonary disease.
mesh_terms: D002908:Chronic Disease; D004359:Drug Therapy, Combination; D004809:Ephedrine / Q000008:administration & dosage* / Q000627:therapeutic use; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000188:drug therapy*; D013806:Theophylline / Q000008:administration & dosage* / Q000627:therapeutic use
chemical_list: D013806:Theophylline; D004809:Ephedrine