I have read in a few places on these boards and others that if you are not having the strange euphoric effects on stimulant medications, then that could be an indication that you are ADD. Is this true or just hogwash. My doctor said that I might experience extreme euphoria and that if it lasted more then a few days or I didn't sleep for a night to call him ASAP and he would instruct me on what to do. I never had any euphoria which I was so glad about and I actually sleep alot better and some days too much. Also if anyone knows about bipolar disorder, if I have it which I don't think I do, wouldn't concerta make this condition worse?