Use of Adderall(adderrall) to treat ADHD

  My doctor has recently put me on 10 mg of Adderall (adderrall) to treat my ADHD (I am an adult).  I only take it in the morning.  I'm wondering how long Adderall (adderrall) stays active in my body.  I go to graduate school at night and I'm wondering if I should be taking it later in the morning so that it will continue to be effective late in the evening.  I'm concerned because I know with the Ritalin it leaves the system in approximately four hours.  I currently take it at 7:30 AM and my grad classes don't begin until 6:00 PM

[HFHS.MD-AJ]

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Carrie,
Adderall (adderrall) is a combination of 4 amphetamine compounds, often reserved for second line treatment of Attention-deficit/hyperactivity disorder (ADHD), when Ritalin is not effective. It generally stays active in the body for about 12 hours, compared to 4-6 hours for Ritalin. Late evening doses should be avoided because of possible insomnia as a side effect. It is important that you discuss any change in your treatment plan with your doctor.
This response is for general information only. Always contact your physician for any health concerns.
Keywords: Adderall (adderrall), ADHD, amphetamines, Ritalin