"i am 15 and have been on concerta since 6th grade i have never really felt any side effects besides loss of appetite in the afternoon. but just last year i started getting muscle spasms and i began to zone out often at school. even more recently i have began to have trouble with sleep and slight depression. i have tried getting the concerta switched for something else but its the only medicine that helps me focus in school and help me get good grades. i mean don&#039;t get me wrong it helps a lot but i&#039;m not sure why i&#039;m just getting these side effects"