Background: The underlying mechanism involved in dapsone-induced mania remains unknown.
Methods: We report the case of a 54-year-old man with a dapsone-induced mania.
Results: The maximum of manic symptoms was correlated with the maximum of methemoglobinemia and mania decreased concomitantly with the methemoglobinemia level.
Limitations: This is a single case.
Conclusions: This case shows that dapsone-induced mania severity is correlated with methemoglobinemia level, leading for the first time to the hypothesis of a physiopathological mechanism by which dapsone could induce mania.
Keywords: Biomarker; Dapsone; Mania; Methemoglobinemia; Oxydative stress.
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