<prompt> All of the following statements are true about 6 mercapto purine exceptIt is metabolized by xanthine oxidaseIt 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 detruction of excess cells. Azathioprine is an inmunosuppressant drug that acts by generating 6-MP 6-MP is metabolized by xanthine oxidase. Its dose should be reduced when allopurinol is given concurrently. 