On the mechanism of absorption of drugs from the gastrointestinal tract.
D041981:Gastrointestinal Tract / Q000502:physiology*; D006801:Humans; D008658:Inactivation, Metabolic; D004364:Pharmaceutical Preparations / Q000378:metabolism*
D004364:Pharmaceutical Preparations
DRUGS/metabolism; GASTROINTESTINAL SYSTEM/physiology