My son has been on Concerta 54 for 2 years now. His grades have drastically increased and his attitude is great while he os on the meds. I do notice that he comes down from the meds in about 8 hours and his relapse is not fun. He becomes extremely emotional and violent. He will cry at the drop of a hat when things do not go his way. He also wants things to perfection. I also notices he picked up some bad ticks like popping his knuckles or clearing his throat. He is very negative when he comes down from the meds and has a hard time falling asleep.