title: Clinical evaluation of an antiasthmatic compound. Correlation of absorption with blood levels of theophylline.
mesh_terms: D000328:Adult; D000368:Aged; D001249:Asthma / Q000188:drug therapy*; D006140:Guaifenesin / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010665:Phenylpropanolamine / Q000627:therapeutic use; D013566:Sympathomimetics / Q000627:therapeutic use*; D013806:Theophylline / Q000097:blood / Q000627:therapeutic use*
chemical_list: D013566:Sympathomimetics; D010665:Phenylpropanolamine; D006140:Guaifenesin; D013806:Theophylline