<prompt> All of following statements about are true about 6-mercaptopurine EXCEPT:It is metabolized by xanthine osidaseIt does not cause hyperuricemiaIts dose should be reduced when allopurinol is given concurrentlyIt is an active metabolite of azathioprine  <response>: Ref: KDT 6e p823, 824 All anticancer drugs can result in hyperuricemia by causing the destruction of excess cells. Azathioprine is an immunosuppressant drug that acts by generating 6-MP 