Hello,
Some people have severe withdrawals from the Zyprexa. the same with any of the meds. It is always going to be different for each person. Why is your pysician taking you off the med? I know it is one of the worse for gaining weight.
Are you on an exercise program as that may help you. I feel you may be anticipating the worse and I understand that as I weaned off of Vicodin and was scared to death that I would see bugs. But it went smoothly.
Keep posting and know we are here for you.
Gentle Hugs to you.