"i&#039;m not sure which brand and version i am rating, but all forms of dextroamphetamine have been the best medication for me for like 30 years. i currently take brand (skf) spansules, which are long lasting, smooth and effective for adhd. i have had a generic time release dextroamphetamine (barr), which is about half the potentcy you get from the skf. i take generic (barr) 10 mg tablets (the pharmacy substitutes it for dextrostat, which is not even the same). while in a nursing home i got dextroamphetamine from mallincroft (sp?), which was okay, but not widely available. skf spansules are the best out there that i can find."