I'd humbly suggest weaning off of Zoloft much slower than that. I'd never, ever cut it in half. Maybe cut it a quarter, and remain on that for at least a week, at the very very least. I don't know about weaning off Zoloft, since I remain on 200 mg of it, and probably will indefinitely, but Effexor and Paxil gave me horrible withdrawals, no matter how slowly I did it. Not trying to scare you, as Zoloft may not be as hard to go off of as those two, but those were awful to stop. The worst part was the "brain zaps." I'm glad I had Prozac on hand to start at a low dose while going off them. Best wishes to you!