Donepezil, an acetylcholinesterase inhibitor used in the treatment of Alzheimer's disease, has been widely cited in media and bioethics literature on cognitive enhancement (CE) as having the potential to improve the cognitive ability of healthy individuals. In both literatures, this claim has been repeatedly supported by the results of a small study published by Yesavage et al. in 2002 on non-demented pilots (30-70 years old). The factors contributing to this specific interpretation of this study's results are unclear.

This article challenges recent assumptions that physicians may ethically and legally prescribe psychopharmacological enhancement drugs to patients and the counterintuitive notion that in some cases ingesting an enhancement drug constitutes the more ethical choice than forgoing this option. Enhancement proponents have touted modafinil as an ideal mechanism to improve concentration, alertness, and forgo sleep and keep pace with our society's demands. However, patients who use modafinil for these reasons risk potentially severe side effects and addiction, and face unintended consequences related (...) to their cognitive, emotive, and physiological functioning. Importantly, prescribing a controlled substance such as modafinil for performance enhancement and sleep avoidance runs contrary to a physician's ethical duty to the patient and the standard of practice set forth in legal requirements governing the prescription of controlled substances. (shrink)

In the March 2010 edition of Mayo Clinic Proceedings, Drs. Rose and Curry declared that resident physicians have an ethical duty to reduce error during periods of fatigue. Problematically, however, they argued this means ingesting a stimulant for performance enhancement and sleep avoidance during a shift when a resident physician is experiencing fatigue as the more ethical choice than forgoing ingesting a stimulant. Rather than accepting enhancement as an unstoppable technological imperative, this article will examine the underlying motivations for enhancement (...) embedded in our culture and the corresponding legal framework relating to stimulant drugs. Although our society seems to be engaged in a pharmacological arms race of efficiency, competition, and self “betterment,” the FDA has not approved stimulant drugs such as modafinil for PESA. As a result, the off-label use of modafinil for PESA means these individuals are part of a large-scale experiment that poses serious immediate and long-term side effects to the individual user as well as society. (shrink)

In this chapter, I propose the mechanism of cognitive enhancement based on studies of cognitive-enhancing drugs and behavioral training. I argue that there are mechanistic differences between cognitive-enhancing drugs and behavioral training due to their different enhancing effects. I also suggest possible mechanisms for cognitive-enhancing drugs and behavioral training and for the synergistic effects of their simultaneous application.