The effect of oral theophylline on bronchospasm.
D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D000368:Aged; D001249:Asthma / Q000188:drug therapy*; D001986:Bronchial Spasm / Q000188:drug therapy; D001993:Bronchodilator Agents / Q000008:administration & dosage*; D002648:Child; D004357:Drug Synergism; D004809:Ephedrine / Q000008:administration & dosage; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010919:Placebos; D013147:Spirometry; D013806:Theophylline / Q000008:administration & dosage*
D001993:Bronchodilator Agents; D010919:Placebos; D013806:Theophylline; D004809:Ephedrine