"i have been taking it for several years.  there was a time about a year ago when all the pharmacies could not get any and i went about a month without.  being a service advisor, i deal with a lot of numbers (vin, license plates, etc.). after a few days without, i started reversing a lot of the numbers.  i would see the correct order but would say out loud or write down a reversed version. i had to go slower and double check what i had written.  a positive side effect is it gets me off the couch on the day(s) i have off and motivates me to get stuff done around the house that needs to be done. it kept me up at night at first, but after awhile, i learned not to take it too late in the day. i would recommend it to anyone who has adhd. "