So if you are taking a three credit hour class (which is standard) then you would expect to spend about 6 to 9 hours per week studying for that class. Just to clarify, in this example studying includes homework, reading, projects, and everything else you have to do for a college class.
Similarities and Differences. Dextroamphetamine and amphetamine (brand name: Adderall) and dextroamphetamine (brand name: Dexedrine) are both central nervous system stimulants. Theyâre approved for the treatment of ADHD and also for narcolepsy (a neurological condition marked by severe daytime drowsiness).
Peak levels â During clinical trials, peak plasma concentrations of a single dose 10 or 30 mg of Adderall to healthy volunteers occur about 3 hours post-dose for both d-amphetamine and lamphetamine. In comparison, maximum plasma concentration of Adderall XR is about 7 hours.Half life â When administering Adderall normally, the average elimination half-life for d-amphetamine occurs at 9 â 11 hours post dose vs. 11.5 â 14 hours for l-amphetamine.n comparison, maximum plasma concentration of Adderall XR is about 7 hours. Half life â When administering Adderall normally, the average elimination half-life for d-amphetamine occurs at 9 â 11 hours post dose vs. 11.5 â 14 hours for l-amphetamine.