Blood pressure values of the patient at 9 years of age were measured after administration of thiazide diuretics, which improved electrolyte and blood pressure abnormalities and helped confirm the patient’s FHHt diagnosis. Blood pressure values were averaged and compared to reference pediatric blood pressure ranges from 90th (pre-hypertensive) to 99th (stage II hypertension) percentiles based on reference ranges of the patient’s height (10th percentile) and age (9 years old). The patient became normotensive after administration of thiazide diuretics.