This result signifies that the patient has two copies of no function alleles of the DPYD gene. Based on the genotype result this patient is predicted to be a DPYD Poor Metabolizer with a DPYD activity score of 0. This patient may be at risk for adverse drug reactions to medications that are metabolized by DPD (i.e. 5-fluorouracil, capecitabine, and tegafur) and alternative therapeutic agents may be indicated. Please consult a clinical pharmacist for more information about how DPD metabolic status influences drug selection and dosing.