Immunosuppressants · Pharmacology

A dangerous drug interaction occurs when Azathioprine is administered with which medication, leading to bone marrow suppression?

  1. Propranolol
  2. Allopurinol
  3. Metformin
  4. Amoxicillin
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Correct answer: Allopurinol

Allopurinol inhibits xanthine oxidase, an enzyme responsible for metabolizing 6-mercaptopurine. Concurrent use leads to a toxic accumulation of 6-MP, resulting in severe leucopenia and anemia.

Difficulty: Medium Question 7 of 20

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