Amphetamine / dextroamphetamine
adhd
"I am 21, I'm studying in physics and I have been on adderall for almost 2 years now. I started at 15 mg and I am now at 25 mg. It was good the first year, very effective. But now, I don't think it really helps. I feel sleepy with it and I lost attention very quickly. I don't think the dose is the problem, I feel the effect and I think that increasing the dose will augment the anxiety cause by it (I noticed that each time I had to augment the doses, the side effects was worst). 

I'm gonna return to Ritalin tonight, it was way more effective. Or maybe another one with methylphenidate. Concerta didn't works for me, maybe biphentin should."