Forget sports doping. The next frontier is brain doping.

Cognitive enhancers — to clarify the mind, improve concentration or control emotions — include attention deficit drug Adderall, narcolepsy pill Provigil, Ritalin, and beta blockers, such as the heart drug Inderal.

Researchers have been investigating the drug Aricept, which is normally used to slow the decline of Alzheimer’s patients.