the parents of a child with attention deficit hyperactivity disorder (adhd) bring the child for a follow-up visit. during the visit, they tell the nurse that the child receives the first dose of methylphenidate at about 7:30 a.m. every morning before leaving for school. the teacher and school nurse have noticed a return in the child's overactivity and distractibility just before lunch. the child's second dose is scheduled for about 12 p.m. which might the nurse suggest as a possible solution to control the child's symptoms a bit more effectively?.