Bupropion
"I took Wellbuterin for smoking cessation. This stuff made me feel weird and amped up within a matter of days. I have bipolar disorder, and I stopped taking it fairly quickly after I started. 



Around this time, I started having weird panic episodes when falling asleep. I would awake like a electrical shock hit my brain, just as my body got to the point of relaxation and sleep. The doctors had no idea what was going on, and one of them said the only thing consistent with my symptoms was methamphetamine withdrawal, and I've never taken such things in my life. 



Many years later, a friend sent me an article saying that Wellbuterin caused this type of withdrawal. 



If this drug works for you, great. However, it was a nightmare for me."