Modafinil, a drug officially approved to treat narcolepsy but increasingly used off-label to improve cognitive performance, has been shown to carry a greater risk of addiction than was previously thought.
Brain scans of 10 healthy men taking Provigil, the version of modafinil made by the pharmaceutical company Cephalon, showed increased levels of dopamine in the part of the brain involved in pleasure and addiction. Dopamine is a neurotransmitter, a chemical that carries messages from nerve cell to nerve cell or other tissues. Drugs that increase dopamine have the potential for abuse [USA Today]. The demonstrated effect is similar to that known to accompany classically addictive stimulants, and federal health officials hope that the findings will serve as a warning that modafinil may have unexpected and tragic consequences for people who use it simply for a brain boost [LA Times].
