title: Comparison of serum theophylline levels with plain and slow-release aminophylline in patient with airway obstruction.
mesh_terms: D000328:Adult; D000368:Aged; D000628:Aminophylline / Q000008:administration & dosage* / Q000009:adverse effects; D001249:Asthma / Q000097:blood / Q000188:drug therapy*; D001991:Bronchitis / Q000097:blood / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D003692:Delayed-Action Preparations; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013806:Theophylline / Q000097:blood*
chemical_list: D003692:Delayed-Action Preparations; D000628:Aminophylline; D013806:Theophylline