He may be "compliant" now because he's doped up on the drug. When I was a head teacher the local paediatrician put 3 of my pupils on Ritalin, all against the recommendations of the teaching staff. We had several concerns - personally I think it's almost abuse! I agree with the others - go back to the doctor and query it. Also ask for advice on who else you could speak to, could give you advice etc.. Good luck!

Ali