I have quit Geodon, wellbutrin, lexapro, prozac, abilify, concerta, risperdal, lamictal and so many others that I can't think of cold turkey. Never had withdrawal that I noticed and no ill side effects other than my depression got a bit worse but no doom or gloom. I am medication resistant so maybe they don't really work for me. I don't really know. I just know I quit and nothing seems to happen. I take them and nothing seems to happen no matter how much they up them.