I taken Zyprexa and Zydis, have to say didn't notice much difference, though my doctor said that Zydis has less side effects such as weight gain.
Freddie
Zydis and Zyprexa have the same active ingredient and would have the same side effect profile. The only difference being that the Zydis will enter the bloodstream quicker and take effect more quickly. I've taken the Zydis and had the weight gain issue.