im also on Adderall XR 20mg, twice a day, by a nurse practicioner at psychiatrist office. i kept complaining that Aderall XR only lasts me 4hrs if im lucky (she had me up to 30mg XR)i said my mornings start at 6am, and by 10, its wearing off right at the end of my first class, with 3 more to do, i kept telling her i was getting pissy irritable, i had the overwhelming urge to redose to focus again and mask the negative side effects. So she gave me it twice a day, i told her the IR adderall in my opinion last just as long as the XR if not longer and i feel less bad sife effects, but she is too cautious.
she knows i have drug dependency issues, methadone maintenance and on klonopin. I wanted to switch to Vyvanse but my insurance wont cover it, so she offered if i wanted, Dexedrine Spansule, i just hope she is smart enough to know that if im on 40mg adderall daily that she better match up a close equivalent dose. i told her str8 up i do my research and that aderall is a mixture of amps, the L-amp is the reason for the anxiety, nervousness, etc..then she mentioned "then ur gonna have a purer form of a single amphetamine in a capsule/tablet. but i may switch to dexedrine, only if eh agrees to put me on 15mg 2x/daily like i used to be on..well ill be happy with 15mg daily for starters, andd finally no more crashes, anxiety, piussy, cravings...then again the lifestyle of fast cash will be the bad dog talking cuz no one has heard of dexedrine, whoops..