A nurse is teaching the guardian of a school-age child who has autism spectrum disorder about a new prescription for risperidone. Which of the following statements by the guardian demonstrates an understanding of the teaching?

A. "This medication will help control my child's aggressive behavior.": Risperidone is an atypical antipsychotic commonly prescribed to manage irritability, aggression, and self-injurious behavior in children with autism spectrum disorder. It helps stabilize mood and reduce disruptive behaviors, improving overall functioning. B. "This medication can cause my child to have low blood sugar.": Risperidone is more likely to cause hyperglycemia or weight gain due to metabolic side effects rather than low blood sugar. Monitoring for increased appetite, weight changes, and glucose levels is important. C. "This medication won't require my child to have routine lab tests.": Routine lab monitoring is necessary for children taking risperidone, as it can cause metabolic effects such as increased cholesterol, blood glucose, and prolactin levels. Regular follow-up ensures safe and effective medication management. D. "This medication might need to be increased if my child has muscle spasms.": Muscle spasms or stiffness can indicate extrapyramidal side effects, which may require dose reduction or a medication change—not an increase.