<prompt> Answer this question truthfullyWhich class of drugs can potentially increase the risk of side effects associated with azathioprine6-mercaptopurine 6-MP?  <response>: <reason> Xanthine oxidase inhibitors, such as allopurinol and febuxostat, are the class of drugs that can increase the risk of side effects associated with azathioprine6-mercaptopurine 6-MP. 