I was dizzy, lightheaded, nauseaus, and had a bad headache for a little over a week after I tapered my 50mg dose to 25mg. The drug stays in your body for about 3 weeks, so it was about that long after I started taking the lower dosage that I felt sick and I didn't make the connection. Plus I felt more pukey and headachy in the interval between cutting back and the horrible week. But after that horrible week was over, I was much better! It does scare me from going off the med, though. Also I'm scared that if I go off completely that my IBS will get worse or something and I'll have to go back on it or another one, and I had lots of problems with nausea when I first started taking it.I thought I had tapered enough, but I'll go super, super slow in the future. Cut pills into eigths and sixteenths if I have to. I would go very very very slowly and unless you have a reason for having to go faster, don't.Good luck!!