title: [Vitamin B 12-(cyanocobalamin)-allergy].
abstract: A case of vitamin B12 allergy is reported. Typical eczematous and exanthematic skin lesions appeared after long-term and high-dosed intake of a vitamin B12 drug (Biovital). Patch tests with vitamin B12 were positive. This observation of vitamin B12 allergy we compared with previous published cases.
mesh_terms: D000707:Anaphylaxis / Q000139:chemically induced; D055598:Chemical Phenomena; D002621:Chemistry; D003875:Drug Eruptions / Q000209:etiology*; D004342:Drug Hypersensitivity / Q000209:etiology*; D004485:Eczema / Q000139:chemically induced; D005260:Female; D006801:Humans; D008134:Long-Term Care; D008297:Male; D008875:Middle Aged; D009325:Nausea / Q000139:chemically induced; D014581:Urticaria / Q000139:chemically induced; D014805:Vitamin B 12 / Q000008:administration & dosage / Q000009:adverse effects*
chemical_list: D014805:Vitamin B 12
vernacular_title: Vitamin-B12-(Cyanocobalamin-)Allergie.