Letter: Vehicle for oral theophylline.
D000284:Administration, Oral; D001249:Asthma / Q000188:drug therapy; D004338:Drug Combinations; D004809:Ephedrine / Q000008:administration & dosage; D000431:Ethanol; D006801:Humans; D014677:Pharmaceutical Vehicles; D013806:Theophylline / Q000008:administration & dosage*
D004338:Drug Combinations; D014677:Pharmaceutical Vehicles; D000431:Ethanol; D013806:Theophylline; D004809:Ephedrine