I was in need of some daytime energy/motivation so my Dr. tried 30mg. Adderall XR, 2 x daily.Dextroamphetamine Sulfate extended release capsules 10mg. up to 4 daily. Along with my Effexor XR (225mg.) and Risperdal (1mg). I don't sleep very well. I have a primary sleep disorder plus sleep apnea plus a REM sleep disorder. plus insomnia. That combination works pretty well. If I take too many Dextroamphetamines I have gotten a bit "jittery" but I try to avoid that.