Young adults were more likely to get in trouble with Adderall and its generic form than they were Ritalin. The drugs have a reputation as helping to enhance mental performance.
With two young men dead, the Food and Drug Administration is considering banning sales to consumers of a highly concentrated form of pure caffeine. It's too easy to overdose, officials warn.
Modafinil has been approved for treatment of narcolepsy, but it's often used to improve mental performance. The question is, does it work? A new study says probably not.