Relationship of structure to activity of antihistamines.
D018926:Anti-Allergic Agents; D006633:Histamine Antagonists; D006634:Histamine H1 Antagonists / Q000494:pharmacology*
D018926:Anti-Allergic Agents; D006633:Histamine Antagonists; D006634:Histamine H1 Antagonists
ANTIHISTAMINICS/effects