The survey provided estimates of the prevalence of use of a variety of illicit drugs, alcohol, and tobacco, based on a nationally representative sample (17,747 persons) of the civilian noninstitutionalized population age 12 and older. Selected findings included: (1) An estimated 12.8 million Americans were current illicit drug users, i.e., had used an illicit drug in the month prior to interview; (2) Fifty-two percent of the population (111 million persons) had used alcohol in the past month; (3) About 10 million current drinkers were under age 21; (4) An estimated 61 million Americans were current smokers; (5) Current smokers were more likely to be heavy drinkers (drinking five or more drinks per occasion on 5 or more days in the past 30 days) and illicit drug users than nonsmokers; (6) Overall, 7.3 percent (4.3 million) of women age 15-44 had used an illicit drug in the past month; the corresponding rate for men age 15-44 was 11.6 percent; and (7) Of the 4.3 million women age 15-44 who were current illicit drug users, more than 1.6 million had children living with them, including 390,000 with at least one child under 2 years of age. Figures, appendixes