Oh, do I hear you. I have the king of candy snitching and sugar cravings living with me. He is acting impulsively. And ,sugar is brain food. Don't be afraid of increasing the dosage of his meds. They dont depend on weight. I know of a 7 yr old who weighs 48 lbs who takes 72 mgs of concerta. My 14 yr old ,who is 5'10" and weighs 120, only takes 54 mg.[and has for 5 yrs]
I agree with edbson. Keep him active and talk to his doc.
Granny Fran is right about meds, they are based on symptom control. It is different for each child. There is no standard dose based on weight, except for Staterra.
My son has a sweet tooth, too. His doctor told me to make sure I included something sweet in his lunch everyday. I think it was to keep up his blood sugar since the meds tend to supress their appetite during the day that the blood sugar got very low. I think that is part of the rebound problem--low blood sugar. But, having something sweet in lunch might help supress that desire for candy.
My guy was a little one for years and now at 12 is up to 125 pounds and is 5'4". Between 10 and 12 he did most of his growing. We switched to provigil for a drug study and he gained 35 pounds in 6 months.
Sometimes med breaks help them caught up on the weight gain. We do not do med breaks, we lower his dose during the summer instead. We do push calorie dense foods for him because he burns whatever he eats off quickly.
I agree the teacher is sending mixed messages to you about his behaviour to you. I don't have an answer for you. Does he have an IEP or 504 plan? And does it address behaviour?