getting off straterra? | ADHD Information

my son is 13 and has been on one adhd drug or another since he was 7.  he is currently on 100mg a day of straterra and lexapro.  this school year has been disaster.  his classroom behavior is beyond horrible, he has been suspended for his insubordinate behavior 3 times, he has absolutely no self control.  and i see this at home.  his attention span is worse than it every has been.  he seems depressed and angry and it seems worse on straterra.  i want to take him off of everything and see where we are at.  do i need to wean off of straterra?  the lexapro i think i do, but not sure about straterra.  his dr. is no longer in our insurance plan, so i need to find someone new, but i cant see giving a kid 0 worth of drugs a month and not have them do a bit of good.