A nurse is assessing a 5-year-old child who has diabetes insipidus and is receiving desmopressin. Which of the following findings should the nurse identify as an indication that the medication is effective?

A. Diabetes insipidus does not cause hypoglycemia, so this is not relevant. B. Capillary refill time is unrelated to diabetes insipidus management. C. A heart rate of 140/min is tachycardic and may indicate dehydration or other complications, not medication effectiveness. D. Desmopressin reduces excessive urine output, and a cessation of nocturnal enuresis (bedwetting) indicates improved fluid balance and medication effectiveness.