Poor absorption of an un-theophylline xanthine bronchodilator.
D000328:Adult; D001682:Biological Availability; D004400:Dyphylline / Q000008:administration & dosage / Q000378:metabolism*; D006801:Humans; D007408:Intestinal Absorption; D013806:Theophylline / Q000031:analogs & derivatives*
D004400:Dyphylline; D013806:Theophylline