The authors collected detailed histories of illicit drug use in the Army
in individual interviews with a stratified random sample of 262 enlisted
men at six military posts across the United States. Approximately half of
the sample (N equals 128) were classified as drug users; 90 of these
individuals were identified as career multiple-drug users. Most of these
subjects used a variety of drugs in frequently changing patterns. The
authors emphasize the individualistic nature of drug use and question the
appropriateness of an addiction model for most users of illicit drugs.