I Currently Broke Out In A Rash. And My Dr

I currently broke out in a rash. And my Dr has suggested I stop taking lamictal. Could this drug cause a rash I have been on it for about 10 yrs and no problems ever. I just started taking olanzapine. I was wondering if this could be the cause of the rash? I don't feel right I am very depressed since stopping the lamictal and started the olanzapine.