"i am a 56 year old, 200lb caucasian male who started on adhd medicines back in 1995.  i&#039;ve tried others, but dextroamphetamine has always worked the best.  the only side effects i have noticed over time are occasional grinding of teeth and insomnia if i take a dose too late in the afternoon. i think that over time it has changed the way i think, but it is hard to know exactly how and what to do to the normal effects of aging.  i am happy with the medication, and can recommend it as treatment for add /adhd."