Which of the following drugs is used as an immunosuppressive but lacks anticancer activity: (A) Methotrexate, (B) 6-mercaptopurine, (C) Azathioprine, (D) 5-flurouracil
Answer is C. Ref-KDT 6/e p819,820,838 Azathioprine is an an antimetabolite that is used as an immunosuppressant but not as an antineoplastic drug. It is a product and this conveed to its active metabolite in the Lymphoid Cells only