title: Chronic and recurrent urticaria: new concepts of drug-group sensitivity.
abstract: From further studies on identification of etiologies in chronic and recurrent urticaria, two conclusions stand out: (1) that multiple, differing drugs and chemicals may form a single family group, with cross-hypersensitivity to other substances within the group and (2) that many patients tend to develop hypersensitivity to substances in multiple groups.
mesh_terms: D001241:Aspirin / Q000009:adverse effects; D001463:Barbiturates / Q000008:administration & dosage; D001780:Blood Coagulation Tests; D002908:Chronic Disease; D003429:Cross Reactions; D004305:Dose-Response Relationship, Drug; D004342:Drug Hypersensitivity / Q000150:complications* / Q000235:genetics; D005512:Food Hypersensitivity / Q000209:etiology; D006801:Humans; D006969:Hypersensitivity, Immediate / Q000175:diagnosis; D010406:Penicillins / Q000008:administration & dosage; D012008:Recurrence; D012882:Skin Tests; D013449:Sulfonamides / Q000008:administration & dosage; D014581:Urticaria / Q000209:etiology*
chemical_list: D001463:Barbiturates; D010406:Penicillins; D013449:Sulfonamides; D001241:Aspirin