title: [The third-generation antihistaminics. Can they prevent the tier change?].
mesh_terms: D001249:Asthma / Q000209:etiology / Q000517:prevention & control; D016535:Bronchial Hyperreactivity; D006634:Histamine H1 Antagonists / Q000008:administration & dosage / Q000627:therapeutic use*; D006801:Humans; D017336:Loratadine / Q000008:administration & dosage / Q000031:analogs & derivatives / Q000627:therapeutic use*; D010919:Placebos; D016032:Randomized Controlled Trials as Topic; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy*; D012307:Risk Factors
chemical_list: D006634:Histamine H1 Antagonists; D010919:Placebos; D017336:Loratadine; C121345:desloratadine