Read their site: http://www.zyprexa.com/common_pages/safety.jsp

They tell you how to tell if you are at risk and what precautions your doctor should be taking, etc. Talk to your pdoc and alert him you're scared and get him to tell you what he knows; there's been class action lawsuits because of its causing diabetes but not everyone is going to get diabetes just because of the drug -- it increases your risk though.