The participants entered the detoxification service at Beth Israel Medical Center in New York City during August and September 1988. They included 71 men and 19 women, of whom 38 were black, 32 white, and 29 Hispanic. Their average age was 35 years. They randomly took part in either two, large-group film and discussion sessions; two, small support-group sessions; or a large group followed by a small group. Results showed that the participants had considerable information about AIDS and HIV transmission before receiving the educational programs. However, 79 percent reported never having used condoms, and 50 percent of the intravenous drug users reported sharing needles during that previous year. The program increased knowledge, stated intentions to use condoms, and increased determination to stop drug use. Results suggested that AIDS education efforts can be useful in programs to help prevent HIV transmission among drug users. Tables (Author abstract modified)