I have been taking phentermine for a month lost 11 lbs first month. I ate moderately healthy before. Never drank soda only coffee tea etc. I have totally lost my appetite for anything. Nothing sounds appealing at all. I have read the amounts of lbs other people have lost and feel discouraged because mine is lower. I also have noticed that during the first month I had a lot of energy. Now into my second month I can hardly motivate myself to do anything like I don't even have the energy to pick up a fork. My sleeping habits are effected too as they weren't before now I'm lucky to get four uninterrupted hours a night. Has anyone else had this happen to them. I'm still losing I can tell by the way my clothes fit. Went from a 20 shirt size to a 16 and a 14 pants to a 11. That makes me feel a little more accomplished I'm just so tired.