title: Relative bioavailability of two sustained-release theophylline formulations versus an immediate-release preparation.
mesh_terms: D000042:Absorption; D001249:Asthma / Q000188:drug therapy*; D001682:Biological Availability; D002986:Clinical Trials as Topic; D003692:Delayed-Action Preparations; D004334:Drug Administration Schedule; D006801:Humans; D007700:Kinetics; D011897:Random Allocation; D013806:Theophylline / Q000008:administration & dosage* / Q000097:blood
chemical_list: D003692:Delayed-Action Preparations; D013806:Theophylline