title: The once-daily theophylline controversy.
mesh_terms: D000042:Absorption; D001682:Biological Availability; D006207:Half-Life; D006801:Humans; D013806:Theophylline / Q000008:administration & dosage* / Q000378:metabolism; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D013806:Theophylline