There is evidence to suggest that drug use and abuse significantly declined during the Reagan presidency.[11][12][13] According to research conducted by the Institute for Social Research at the University of Michigan, more young people in the 1980s were saying no to drugs.[11] High school seniors using marijuana dropped from 50.1% in 1978 to 36% in 1987,[11] to 12% in 1991[13] and the percentage of students using other drugs decreased in a similar fashion.[11] Psychedelic drug use dropped from 11% to 6%, cocaine from 12% to 10%, and heroin from 1% to 0.5%.[11]
Though a complete correlation between the drop in drug use and the Just Say No campaign cannot be definitely established, there is little doubt that Nancy Reagan's efforts of speaking out forcefully against drugs increased public awareness of the problem.[11]
The campaign drew some criticism from those who argued that the program was too costly.[14] Author Jeff Elliott stated that the Reagan administration's synonymous use of the terms "drug use" and "drug abuse" was improper, and that drug use in America was underestimated; Dr. Michael Newcomb claimed that there is "no evidence that most people who experiment with drugs get hooked."[14] It was also argued that the program did not go far enough in addressing many social issues including unemployment, poverty, and family dissolution;[14] Nancy Reagan's approach to promoting drug awareness was also labeled simplistic by critics who argued that the solution had been reduced to a catch phrase.[15]