I gave my son too much vyvance

Patient: My son is on Vyvanse 50mg.s in the morning. Adderall xr 10 mg. at lunch. Then clondine 2mg and risperdone.1 mg. at night. Tonight I accidently gave him his vyvanse instead of his nighttime meds. He is 8 years old and about 50 pounds. What should i do?