A 6-year-old child with ALL on mercaptopurine maintenance; the parent asks about taking the medication with warm milk to help him sleep. What is the most appropriate advice?

A 6-year-old child with ALL on mercaptopurine maintenance; the parent asks about taking the medication with warm milk to help him sleep. What is the most appropriate advice?

• A. Mercaptopurine should be taken with milk to aid absorption
• B. Mercaptopurine should not be taken with milk, as it reduces drug absorption
• C. Milk has no effect on mercaptopurine absorption
• D. The dose should be taken on an empty stomach with water only

Answer: (B)

Milk can interfere with how mercaptopurine is absorbed from the gut. Taking the medicine with dairy products lowers the amount that reaches the bloodstream, which can reduce its effectiveness in maintenance therapy for ALL. Therefore, avoid giving it with milk. Instead, give mercaptopurine with plain water, at the same time each day, and as directed (often on an empty stomach) to keep absorption consistent. If sleep concerns arise, address them separately with non-drug strategies and the clinical team.

Milk can interfere with how mercaptopurine is absorbed from the gut. Taking the medicine with dairy products lowers the amount that reaches the bloodstream, which can reduce its effectiveness in maintenance therapy for ALL. Therefore, avoid giving it with milk. Instead, give mercaptopurine with plain water, at the same time each day, and as directed (often on an empty stomach) to keep absorption consistent. If sleep concerns arise, address them separately with non-drug strategies and the clinical team.