"i&#039;ve been on 18 mg concerta for 3 days. i&#039;m a 39 year old woman with adhd-pi with anxiety. 
the 1st day i felt fluey and extremely tired, but very mellow and happy, nevertheless it didn&#039;t do a thing for focus/attention. the 2nd day i felt inconsistent fluctuations with my mental clarity/focus. also, there were fluctuations in tiredness, i had to drink caffeine twice in the day on order to kind of function. also my appetite became enormous. i still felt quite calm and centered though, which was nice for a change. 3rd day was more of the same from the 2nd day, but my appetite was less. i&#039;m wondering if i should keep taking this."