Acneiform eruption induced by lithium carbonate.

A 26-year-old female developed a severe acneiform eruption on her face, chest and back soon after she started taking lithium carbonate for psychosis. Histopathological examination revealed it to be folliculitis, rather than true acne. The eruption continued for six months but was resolved three months after discontinuing the drug. It has not reappeared in the following 3 years.