title: Pharmacologically active substances in hypersensitivity reactions.
mesh_terms: D000707:Anaphylaxis / Q000209:etiology; D000818:Animals; D000906:Antibodies / Q000378:metabolism; D001920:Bradykinin; D006168:Guinea Pigs; D006632:Histamine; D006967:Hypersensitivity / Q000209:etiology*; D006968:Hypersensitivity, Delayed / Q000209:etiology; D006969:Hypersensitivity, Immediate / Q000209:etiology; D008198:Lymph Nodes; D051379:Mice; D010539:Permeability; D051381:Rats; D013189:SRS-A / Q000378:metabolism; D012701:Serotonin
chemical_list: D000906:Antibodies; D013189:SRS-A; D012701:Serotonin; D006632:Histamine; D001920:Bradykinin