My son has been on it for about a year. He is 18 and takes 20 mg in the morning along with 450 mg Welbutrin. He is also 6'5'. He has consistently complained that it stopped working about 2-3:00. His doctor last week added 10 mg to be taken at 2-3:00 p.m.. We will see how this goes. Focalin has made a complete change in his life. Nothing to this point had worked. Up to this point he had failed at least one class a semester. This semester he had a 3.3 GPA and graduated from high school.
Good luck
It is fairly new. Only 2-3 years old I think.
My DD takes it and is doing well. She's on 15mg right now.
My 4 1/2 yr old has been taking focalin XR since he was three. He takes 5mg and has never had a single side effect. He has also become a fantastic kid. We are big fans of focalin xr at our house.
ditto hpymomofadhdson