title: Is circadian variation in theophylline trough levels determined by time of dosing?
mesh_terms: D002940:Circadian Rhythm; D003692:Delayed-Action Preparations; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D007700:Kinetics; D008297:Male; D013806:Theophylline / Q000008:administration & dosage / Q000097:blood*
chemical_list: D003692:Delayed-Action Preparations; D013806:Theophylline