title: Allergy and antihistamines. A new riddle.
mesh_terms: D006634:Histamine H1 Antagonists / Q000494:pharmacology*; D006801:Humans; D007073:Immunoglobulin E / Q000378:metabolism; D012221:Rhinitis, Allergic, Perennial / Q000276:immunology*; D006255:Rhinitis, Allergic, Seasonal / Q000276:immunology*; D013601:T-Lymphocytes / Q000187:drug effects / Q000276:immunology
chemical_list: D006634:Histamine H1 Antagonists; D007073:Immunoglobulin E