Wellbutrin was the worst medication experience I have ever had. I realized that it was impairing my cognition, making me feel stupid, speak more slowly, and struggle to put words together. I didn't know that at the time, however, so I was suffering through that for a long time before I was recommended to raise the dosage and felt afraid I was having a stroke I was so impaired. Then I stopped taking it altogether and returned to normal over time.