I didn't have to get tested when I started. I was 23 at the time and in law school. All I said to my GP was that I was having a hard time concentrating in class and that one of my professors asked if I had been diagnosed with ADD. He prescribed Strattera (a non-amphetamine) at first but it didn't work. So I went to see a psychiatrist and he pretty much allowed me to self-diagnose using a numerical range designed to see how much ADD was impacting my behavior. I exaggerated to get to the place I needed to be to be prescribed a stimulant, and asked for Adderall by name since my friend sold it to me in college and law school and it worked wonders if I needed to stay up all night for a test or paper. Now I'm on 40 mg XR in the morning and I feel so much more productive. The only downsides are lack of erection and the tendency to smoke WAY too much to battle the high from the Adderall. Feel free to ask em any more questions if you have them.