This result signifies that the patient has one copy of a normal function allele and one copy of a no decreased allele . Based on the genotype result, this patient is predicted to have decreased ABCG2 function. This patient may be at risk for an adverse response to medications that are affected by ABCG2. To avoid an untoward drug response, dose adjustments may be necessary for medications affected by ABCG2 (i.e. statins). Please consult a clinical pharmacist for more specific information about how ABCG2 function influences drug dosing.