Hi! Im a 16 rising senior in highschool, and im considering going back on concerta for my ADHD. however, I ve been generally concerned with the side effects of the medication, specifically how it effects blood flow in the body. As an athlete, restricted blood flow can be a significant impairment, one that could cause me to pass out or become dizzy (only what ive read, im not prone to these symptoms otherwise). Also, I ve read that it negatively effects the penis, which is a concern of mine, since I am sexually active. Is there any thing I should know about going back on concerta? Any information would be greatly appreciated. Thank you!