title: Chemicals released as a result of antigen-antibody union.
mesh_terms: D000707:Anaphylaxis; D000818:Animals; D000937:Antigen-Antibody Reactions; D004285:Dogs; D006634:Histamine H1 Antagonists / Q000627:therapeutic use; D006636:Histamine Release; D006801:Humans; D066298:In Vitro Techniques; D012701:Serotonin / Q000378:metabolism / Q000627:therapeutic use
chemical_list: D006634:Histamine H1 Antagonists; D012701:Serotonin