The effect of oral theophylline on bronchospasm.
D000284:Administration, Oral; D001249:Asthma / Q000188:drug therapy; D001986:Bronchial Spasm / Q000188:drug therapy*; D004809:Ephedrine / Q000008:administration & dosage; D006801:Humans; D013806:Theophylline / Q000008:administration & dosage*
D013806:Theophylline; D004809:Ephedrine