OTC treatment | ADHD Information

Hello everyone.  I'm new here.  I just had an appointment with a therapist and he concluded that I have ADHD.  I'm forced to agree with him because I can never concentrate on anything for for than a few minutes, even if I'm very interested in what I'm doing. 

I'm going to college and only have two classes left to get my Associates Degree. Its amazing that I managed to make it so far without any kind of treatment.  However, one of my last required classes I have to take is college algebra and I'm not looking forward to struggling with it, due to problems I have concentrating.   I will not have a prescription until after the class begins, which will be very soon.  Are there OTC treatments available to help with concentrating?   When I drink caffine I focus well, but that doesn't last.  I'm desperate for information! Enchilada39677.9422685185Whoops................I didn't see the Alternative Medications  Thread before......I'll go over there