Allergy to hydroxycobalamin, with tolerance of cyanocobalamin

David Heyworth-Smith and Patrick G Hogan
Med J Aust 2002; 177 (3): . || doi: 10.5694/j.1326-5377.2002.tb04709.x
Published online: 5 August 2002

To the Editor: Cyanocobalamin and hydroxycobalamin are synthetically derived preparations of vitamin B12. Allergy to vitamin B12 injection is infrequent, but may be serious. We describe a patient with allergy to hydroxycobalamin, without cross-reaction to cyanocobalamin.

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  • 4. Cobcroft R, Cobcroft S. Oral vitamin B12 for B12 deficiency [letter]. Med J Aust 1999; 170: 451.


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