Pharmacology All of following statements about 6-mercaptopurine are true EXCEPT: A It is metabolized by xanthine oxidase B It does not cause hyperuricemia C Its dose should be reduced when allopurinol is given concurrently D It is an active metabolite of azathioprine 💡 Explanation All of following statements about 6-mercaptopurine are true EXCEPT: ✓ Correct Answer: B. It does not cause hyperuricemia