Theophylline and its fickle unpredictability of absorption.
D000042:Absorption; D001682:Biological Availability; D002940:Circadian Rhythm; D003692:Delayed-Action Preparations; D004334:Drug Administration Schedule; D005746:Gastric Emptying; D006207:Half-Life; D006801:Humans; D007263:Infusions, Parenteral; D013806:Theophylline / Q000008:administration & dosage / Q000097:blood*
D003692:Delayed-Action Preparations; D013806:Theophylline