The "Just Say No" campaign launched by the Reagan administration to combat drug use in the United States was a stunning success.

The "Just Say No" campaign, while raising awareness about drug use, is widely considered not to have been a stunning success in significantly reducing drug use rates in the United States. Studies and critiques suggest that drug use rates did not dramatically decrease as a result of the campaign, and complex social issues surrounding drug abuse required more comprehensive approaches beyond simple slogans.