title: Effect of H2 blockade in the challenged allergic nose.
mesh_terms: D000293:Adolescent; D000328:Adult; D000403:Airway Resistance / Q000187:drug effects*; D000485:Allergens / Q000008:administration & dosage; D002927:Cimetidine / Q000494:pharmacology* / Q000627:therapeutic use; D005260:Female; D006146:Guanidines / Q000494:pharmacology*; D006635:Histamine H2 Antagonists / Q000494:pharmacology* / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008875:Middle Aged; D009297:Nasal Mucosa / Q000187:drug effects / Q000378:metabolism; D009299:Nasal Provocation Tests; D010919:Placebos; D006255:Rhinitis, Allergic, Seasonal / Q000175:diagnosis / Q000188:drug therapy*; D012912:Sneezing / Q000187:drug effects
chemical_list: D000485:Allergens; D006146:Guanidines; D006635:Histamine H2 Antagonists; D010919:Placebos; D002927:Cimetidine