I took it for about 15 months, for unipolar psychotic depression. I started at 10 mg and over the months that dose was increased to 25 mg. It didn't do anything for the psychosis or the depression, but it totally rebooted my sleep cycle. I went from sleeping 2-4 hours a night to sleeping more than full nights. For that I was very grateful. I went from a BMI of 16.4 to one of 26.3. While at 25 mg my period stopped, it started again when I went back to 20 mg. While tapering off I lost the weight without trying, now I have a BMI of 22.3. When, while tapering off, my dose went to 5 mg a night I started having insomnia again. Now I'm on Clozapine, which also helps me sleep.