My mom,77 who has ALS was but on Zoloft for depression. I really...

My mom,77 who has ALS was but on Zoloft for depression. I really need to get her off of it FAST! She was at 1ml for one week. I called the doc because she was having nausea. He wanted to try it one more week. She went to 2ml last monday after one week. Fri,Sat, and today she is having terrible headaches. I read all the replies on this sight yesterday for side effect. I told her about the zapping pains and she said yes, that is the kind of pain in my head. It will not let up. I took her back to 1ml last night. What happens if I take her clear off? Can the side effects be any worse than the constant pain she is having in her head? It is 2 weeks today that she is on the drug. Do I wean her or just stop now? PLEASE Help!!