title: Treatment of chronic urticaria.
mesh_terms: D002744:Chlorpheniramine / Q000627:therapeutic use*; D002908:Chronic Disease; D002927:Cimetidine / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004359:Drug Therapy, Combination; D006146:Guanidines / Q000627:therapeutic use*; D006801:Humans; D014581:Urticaria / Q000188:drug therapy*
chemical_list: D006146:Guanidines; D002744:Chlorpheniramine; D002927:Cimetidine