"How can I tell if my five-year-old's AD/HD medication is working?"
Larry Silver, M.D.
Because your son is only five, he probably won’t be able to articulate whether he “feels” different.
Thus, you should rely on close observation. Consider the behaviors that prompted you to evaluate him for AD/HD in the first place. Do you see any reduction in those behaviors? Solicit feedback from teachers, school aides, and others who have had contact with him before and since going on medication.