Hi! I am 20 years old, and I was diagnosed with ADD when I was about 8 years old. I used to take ritilin, but I have been on adderall since 98. I don't eat that much anymore at all. I lost twenty pounds when I first started on it, and never gained it back. I had to stop taking adderall twice because I was too skinny, and had to gain some weight back. Sometimes it gives me a slight headache, but other than that it works. I can concentrate a lot better, and focus more on my work. I'm in my second year of college, and trying to be a teacher, anf it has helped me alot!