"Bupropion (Wellbutrin, Zyban)- legal w/ prescription: ADD, Depression, Smoking. Bupropion is a dopaminergic stimulant, but it has little or no abuse potential. It is an SDRI (Selective Dopamine Reuptake Inhibitor), and the S means that it doesn't get you high."

What you were given is pretty much unabusable.
There is a reason you were given it.. My suggestion is not to fuck around with it.