On this page: About the National Data | Methodology | History
About the National Data
Data
Baseline: 12.0 percent of adults aged 18 years and over reported use of illicit drugs in the past 30 days in 2018
Target: 12.0 percent
Methodology
Illicit drug use is defined as use of at least one of the following substances in the past month: marijuana or hashish, cocaine (including "crack"), inhalants, hallucinogens (including PCP and LSD), heroin, or any nonmedical use of analgesics, tranquilizers, stimulants, or sedatives. Respondents are considered to have used illicit drugs if they report use in the past 30 days of any of the listed substances.