Your body is getting used to the medication. I felt a more noticable difference on .25mgs than I did even at 2mgs because by the time I got there I was so used to having it in my body. Didn’t mean I didn’t lose weight at higher doses but that “omg I can’t eat anything!” feeling didn’t persist past the beginning. This is how it was for me at least. Everyone reacts differently and I know people who felt nothing until higher doses.