My 7year old is on concerta. It works well. He has no appetite. We give it to him at 7am. by 3 he is coming off. At night his appetite comes back. We too had to up the Meds. We also tried adderall and ritalin both really messed him up. All I can say is talk to Doc maybe try something differant. My son is now on Folkalin 20 mg to see if it will help with his eating in the day.

GoPS he weights around 60lbsod luck