More on Adderall Abuse

Jonah Lehrer has a piece up on The Frontal Cortex pointing to an entry from n+1 on the diversion of prescription Adderall® for non-treatment purposes in college students. There’s also an older piece on Slate which can only be described as a trip report. Adderall is prescribed, you may know, for amelioration of symptoms associated with Attention Deficit / Hyperactivity Disorder (ADHD).
Jonah says:

Adderall is a composite of several different amphetamines, which are digested by the brain at different rates.

while over at n+1 we read:

The drug comes in a gleaming capsule, blue or tangerine colored, and it can be swallowed or sprinkled over cafeteria applesauce. It is made of equal portions of four amphetamines, all of which the body metabolizes at different rates, and which are packaged in tiny rotund beads that dissolve at varied speeds, so the effect is consistent. A 10-milligram capsule lasts about six hours and a 20-milligram capsule doubles the duration.

These statements may give a slightly incorrect impression.