Our child has been taking a SSRI for about six years (she is now 12 years old) and we hope she will be able to function without
very soon. By the way, SSRI's are not habit-forming and if the medication
does not work, then wean your son from it following the doctor's instructions. For us, her medication has been a life-saver.
The best advice that I can give you is when you do start medications, go low and go slow.