{"Based on the genotype result, this patient is predicted to be a DPYD poor metabolizer (activity score 0.5) and has an increased risk of severe toxicity when treated with capecitabine. Avoid use of 5-fluorouracil or 5-fluorouracil prodrug-based regimens in this patient. In the event, based on clinical advice, alternative agents are not considered a suitable therapeutic option, capecitabine should be administered at a strongly reduced dose with early therapeutic drug monitoring in order to immediately discontinue therapy if the drug level is too high. If available, a phenotyping test should be considered to estimate the starting dose. In absence of phenotyping data, a dose of <25% of the normal starting dose is estimated assuming additive effects of alleles on capecitabine clearance. Please consult a clinical pharmacist for more information."}