I am a teen and I have ADD. (I guess it is now all just ADHD) My Parents always give me my medicine in the morning when I am in bed. I stayed in bed after my mom gave it to me and fell back asleep. Then, i frogot and my Dad came in and I took it again. Then about ten minutes later I realized that i already had had it.
Well, I just saw this. How are you?
Normally this should be ok, but obviously not something to make a habit of.
If you ever do this again, of course, with any drug, please immediately call a doctor!