"i started taking 150 mg xl 2 weeks ago. (generic bupropion xl) initial side effects were rapid heart beat in the evenings on occasion and insomnia. (i take 0.5 mg xanax to sleep 1 pill each night) still eating like normal but more conscious of healthy weight goals.  little anxious driving and a little more self conscious, but i feel better emotionally and am able to focus better. not so harsh with my 12 year old or co workers.  able to step back for a few seconds and asses instead of reacting.  so far the positives for me outweigh the side effects.  hopefully will get better in a couple weeks. i believe the pharmacy report stated 4-6 weeks for full effect."