It's powerful medication. You need nourishment. Find some threads that talk about what your body needs to fulfill what the drug is doing. Eat and you'll feel better. Basically.
Yes, eating right is essential. ALWAYS eat before you take it. I used to think that if I took it on an empty stomach that I would feel it stronger and longer but I was way wrong. I only felt it less than a hour because my body didn't have any other resources to pull energy from. It also made me feel extremely nauseated and dizzy. Anything acidic will decrease how much of the drug your body absorbs and anything alkaline based will help your body absorb the drug appropriately.