This result signifies that the patient has two copies of decreased function alleles (*_ and *_). Based on the genotype result this patient is predicted to be a poor metabolizer of UGT1A1 substrates. This patient may be at risk for an adverse or poor response to medications that inhibit or are inactivated by UGT1A1. Based on the genotype result, this patient is predicted to have low UGT1A1 function, which is generally indicative of Gilbert syndrome. This patient may be at high risk for toxicity from select medications that inhibit or are inactivated by UGT1A1. Please consult a clinical pharmacist for more information about how UGT1A1 metabolic status influences drug selection and dosing.