Inactivation of the antihistaminic drugs in the liver and in the gastrointestinal tract.
D018926:Anti-Allergic Agents; D041981:Gastrointestinal Tract / Q000502:physiology*; D006634:Histamine H1 Antagonists / Q000378:metabolism*; D006801:Humans; D008099:Liver / Q000378:metabolism*
D018926:Anti-Allergic Agents; D006634:Histamine H1 Antagonists
ANTIHISTAMINICS/metabolism; GASTROINTESTINAL SYSTEM/physiology; LIVER/metabolism