... 100mg until recently. Every few years I have to up my dosage. My doctor told me to take 125 for 3 days and 150 after. Being that I've been on zoloft for years I didnt think I would get really bad side effects with an increase. Im getting really bad headaches with the tingle on my scalp. Feeling dizzy, almost drunk. I get really cold after I take it and shake a lot. I have no energy. Anyone increase and have really bad side effects if so how long till that go away?