"i am 20 years old and i&#039;ve been taking focalin for a year now. i have been on every adhd medication under the sun since i was in second grade and this is the only  medication that helped me get on track right away. the only adverse side effects i experience are a faster heart rate (most adhd meds do that) and trouble sleeping. if you are having trouble sleeping on this drug here&#039;s what you do and here&#039;s what i did: prior to now, i was taking my medication at 11am or 10am. often i would spend nights awake and panicky just begging for sleep to come. this is a simple fix. just wake yourself up at like 6am every day to take it and you shouldn&#039;t have any problem sleeping. that&#039;s what i did and i sleep very soundly."