title: Theophylline dosing frequency: principles and practices.
mesh_terms: D001249:Asthma / Q000188:drug therapy*; D003692:Delayed-Action Preparations; D004334:Drug Administration Schedule; D006801:Humans; D008875:Middle Aged; D013806:Theophylline / Q000008:administration & dosage*
chemical_list: D003692:Delayed-Action Preparations; D013806:Theophylline