My 8 year old son has been on Intuniv for approximately 8 months for ADHD. The last several weeks he has been complaining about abdominal pain inconsistently. Sometimes he complains that his stomach hurts in the morning, sometimes in the middle of the day, and sometimes in the middle of the night. Is this common when using Intuniv? If so is there anything that can be done and have him still be able to continue taking this medication? It works well for his ADHD but I don't want his stomach to hurt either.