I've been told by my Pdoc that Wellbutrin can help with libido issues. I've also heard from people on meds that it did help them somewhat. My med induced lack of libido isn't really a problem because my husband has ED probelms from years of blood pressure meds. We still love each other and cuddle, but very rarely do we actually get down to business

Also her underlying reason for taking Zoloft in the first place can lead to diminished libido. Have you talked to you wife about how dimished intimacy is effecting you. You have right to your feelings. She may be embarassed to bringing this up with her doctor. But this is a common problem and any good doctor will try to help.