"i am 15 years old and was diagnosed with adhd when i was 6. i feel concerta is like a mental steroid. i focus 50% more and understand the things i&#039;m taught better. honestly, i really do not like concerta. i have muscle twitches, nervousness, agitation, a complete lose of appetite, (which gets to the point where i almost pass out due to suppressed hunger pains) tiredness, mellowness, confusion, mood swings quite frequently, irritation of the eyes which is one of the things i absolutely hate, and more. i am not autistic but sometimes i feel like i am during school. my social life is completely impaired. when i take concerta i am a very dull person. i am constantly paranoid, always worried about what others think of me."