Extended release: Adderall (dextroamphetamine and racemic amphetamine) xr is the extended release form of Adderall (dextroamphetamine and racemic amphetamine) (this means that the effects last longer than a faster release form). The longer acting form helps to prevent marked changes in levels of the medication. Some people like immediate release and some like extended release.
Answered 6/24/2014
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