{"Thioguanine can be affected by a patient's TPMT and NUDT15 phenotype. This patient is predicted to be a NUDT15 normal metabolizer. Based on that specific result, the patient may receive a standard starting dose of thioguanine. However, a TPMT genotype does not appear to have been ordered for this patient, and it is not known if TPMT results would further influence the recommended dose or drug. If thioguanine is required and TPMT genotype status is unknown, consider evaluating TPMT erythrocyte activity to assess TPMT phenotype. Erythrocyte TPMT activity test results can be falsely low at diagnosis of leukemia and is unreliable in the case of recent red blood cell transfusions. Monitor closely for toxicity. Please consult a clinical pharmacist for more information."}