Thanks for your query. I appreciate your concerns.
From the details given, your son is apparently suffering from either chronic protozoal disease (amebiasis
) or Irritable Bowels.
It is certainly not due to concerta
If I were your treating doctor, I would have recommended 7 days course of tinidazole
+ deworming course, initially.
Please consult your doctor who knows what would be best for your son.
Dr. R Karanwal