"my son (7 years old now) was diagnosed with adhd last year and was started on 10mg of metadate. we&#039;ve slowly progressed to 60mg now which i was told is the maximum dosage available for this medication.  it seems to work fine on a new dosage for about a month and then nothing.  our doctor is now talking about putting him on adderall which makes me a little nervous since he is already underweight (been reading all the side effects).  he is only 49lbs and 49inches.  we&#039;re feeding him pedisures daily to help boost the weight but still to no avail. just want my son to be able to focus in school!"