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Isoniazid induced pellagra despite pyridoxine supplementation
A Darvay1, T Basarab, J M McGregor
1Department of Dermatology, Ealing Hospital, Southall, UK.
Clinical and Experimental Dermatology
|June 3, 1999
Abstract:
Although pellagra is a recognized complication of isoniazid therapy, the diagnosis may be overlooked or delayed--sometimes with life-threatening consequences. We report a case of isoniazid-induced pellagra which occurred despite pyridoxine supplementation. Drug withdrawal and supplementation with niacin led to a rapid and sustained clinical improvement. The possible mechanisms of isoniazid induced pellagra are discussed.