Wellbutrin, the brand name of bupropion, had the lowest overall rate of sexual dysfunction
. It was associated with a rate of 22% of the overall population. The sustained release formulation fared almost as well with a rate of 25%. In contrast, the SSRIs (Prozac, Paxil, Zoloft and Celexa), venlafaxine (Effexor) and mirtazapine (Remeron) averaged about 40%. When subjects were removed who had other probable causes of sexual dysfunction, the results were even better.