I've been taking 5 mg daily for the last 2 months and had taken 10 mg for a month before that, but it made me extremely tired and sleepy. I could sleep 13 hours straight. As a result, I've gained 20 pounds but I'm not eating a lot. I attribute the weight gain from the lack of exercise and constant fatigue, even now at a lower dose. Anyone else is experiencing such fatigue? I'm trying to work out but it's so hard now and it was part of my routine. I miss it.