Nitrous oxide "whippit" abuse presenting with cobalamin responsive psychosis.
Vitamin B 12
Vitamin B 12 Deficiency
Vitamin B Complex
This case report highlights the need to consider vitamin B12 deficiency in patients who arrive at a hospital with psychiatric manifestations and who report having a history of nitrous oxide exposure or abuse in the recent or remote past. A review of the literature on the neuropsychological manifestations of vitamin B12 deficiency is provided.