I am currently taking 900mg a day. 300mg three times a day. I ran out about a week ago and boy could I tell the difference. You bring up a very valid point and that is the weight gain. Also I am experiencing severe insomia. Any one else having this type of a problem. I was just added nortripyline and now I am wondering if this could be the contributing problem. I have been on the nortripyline now for about a week. I take 100mg of this. However, I have been experiencing insomia for about 3 1/2 weeks now. Any suggestions or comments would be greatly appreciated.