Relative bioavailability and release pattern of whole and halved sustained-release theophylline tablets.
D000328:Adult; D001682:Biological Availability; D003692:Delayed-Action Preparations; D006801:Humans; D008297:Male; D013806:Theophylline / Q000008:administration & dosage / Q000378:metabolism*; D013997:Time Factors
D003692:Delayed-Action Preparations; D013806:Theophylline