{"6-mercaptopurine can be affected by a patient's TPMT and NUDT15 phenotype. This patient is predicted to be TPMT intermediate metabolizer and NUDT15 normal metabolizer. This patient is at risk for myelosuppression with normal doses of 6-mercaptopurine. Consider starting 6-mercaptopurine at 30-80% of normal dose if normal starting dose is ≥75 mg/m2/day or ≥ 1.5 mg/kg/day (e.g., start at 22.5-60 mg/m2/day or 0.45-1.2 mg/kg/day) and adjust doses of mercaptopurine based on degree of myelosuppression and disease-specific guidelines. Allow 2-4 weeks to reach steady-state after each dose adjustment. If myelosuppression occurs, and depending on other therapy, emphasis should be on reducing mercaptopurine over other agents. If normal starting dose is already <75mg/m2/day or < 1.5mg/kg/day, dose reduction may not be recommended. Please consult a clinical pharmacist for more information."}