Hey Elinah,
I have experienced two psychotic manic episodes after being put on antidepressants. They both lasted at least a week. It started out as a feeling of increased euphoria, racing thoughts, confidence boost, insomnia and impulsiveness. These symptoms progressed and got more intense as time went on, and after a few days my thoughts began to turn sinister. I started having hallucinations and hearing voices telling me to kill myself and others.