My son is 6.5 yrs old He is taking 15 mg methylin ER in the am.. has been successful thru approx 2pm We wanted to add another 5 mg in the pm to get thru the day of first grade.. the Dr. instead broke up his 15mg 10 in am and 5 in pm. His mornings have much more impulsivity in them I am concerned for his school days... Does anyone know if 15 in the am and 5 in the pm would be too much? He once said it was okay and now is changing his plan? Our son loses appetite for lunch, but still eats big breakfasts and dinners. He is still active on 15 mgs in the am.. and we have had success in the kindergarten setting? Any ideas?