Like cocaine, MDMA, ephedrine and meth. It differs in it's euphoric and adverse effects, but the positive influence is not permanent.
Not a single drug can help you in the long term, you have to develop the abilities yourself. These drugs have the opposite effect, because as long as you take them you don't evolve. The worst thing is when you get used taking this stuff. You give up faster and think you are unable to deal with it yourself, what leads very fast to an addiction.
So many of my fellow students are taking drugs now for learning, especially Ritalin (but also the other stuff i mentioned earlier). I tried Ritalin once and the results were impressive, but i always had a bad feeling about this. This article proves my concerns right, Ritalin is not without downsides.