title: An investigation of the possible disadvantages of antihistamines in allergic asthma.
mesh_terms: D000293:Adolescent; D000328:Adult; D001249:Asthma / Q000188:drug therapy* / Q000209:etiology; D002648:Child; D002744:Chlorpheniramine / Q000008:administration & dosage / Q000009:adverse effects; D002986:Clinical Trials as Topic; D005260:Female; D006634:Histamine H1 Antagonists / Q000009:adverse effects*; D006801:Humans; D008297:Male; D010919:Placebos; D006255:Rhinitis, Allergic, Seasonal / Q000150:complications / Q000188:drug therapy
chemical_list: D006634:Histamine H1 Antagonists; D010919:Placebos; D002744:Chlorpheniramine