Has anyone had experience taking anti-depressants for severe, chronic Insomnia. Chronic Insomnia is a condition where you can't sleep AT ALL unless you take medication to knock you out. It is not the kind of Insomnia that is merely a sleep disturbance, you don't sleep AT ALL. Doctors prescribe anti-depressants for this condition, has it helped anyone? If so, what anti-depressant did you take? SSRI, Tricyclic, NSRI?