If there is a question of bipolar (a family member with it would be a strong indicator) then stimulant treatment is NOT a good thing. A mood stabilizer should be the place the docs start. I would ask and argue for the doctor to follow the guidelines from the board who certifies psychiatrists.
IF hte medication makes your son so argumentative, etc... he probably should not be on it.
This is a good time to start at the beginning with medications and do a mood stabilizer like lithium (there are others, I forget the names) to see if bipolar is the right diagnosis.
I suggest reading The Bipolar Child by Papalous (sp?), has great info.
Hugs,
Susie