title: Bioavailability of a sustained-release dyphylline formulation.
abstract: The bioavailability of dyphylline from sustained-release tablets, studied in seven normal subjects given a single dose of the drug, was 67.8 per cent of that from conventional tablets. In three subjects given 40 mg/kg dyphylline as sustained-release tablets every 8 hours for four days, serum dyphylline concentrations were maintained above 7.88 microng/ml once steady state was achieved. No adverse effects were noted, though in one subject peak serum dyphylline concentrations reached 30 microng/ml after multiple doses.
mesh_terms: D000328:Adult; D001682:Biological Availability; D003692:Delayed-Action Preparations; D006801:Humans; D008875:Middle Aged; D012995:Solubility; D013607:Tablets; D013806:Theophylline / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000097:blood; D013997:Time Factors
chemical_list: D003692:Delayed-Action Preparations; D013607:Tablets; D013806:Theophylline