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.
Dextroamphetamine and amphetamine is also started at a low dose, usually 5 mg and may be gradually adjusted by your doctor. The maximum daily dose is 40 mg to 60 mg per day. Children are often started at 2.5 mg a day, and gradually increased to a maximum of 40 mg per day.
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.