From the Introduction: "Cannabis use and its perceived ability to drive individuals to the subsequent use of cocaine, heroin, or other illicit drugs has been studied and debated for decades. While the term 'gateway drug' has no formal legal or medical definition, it suggests that cannabis users go on to use and become dependent on other illegal substances. Yet existing statistical research and analysis show mixed results and do not clearly demonstrate scientific support for this theory. As a result, FRD [Federal Research Division] has determined that no causal link between cannabis use and the use of other illicit drugs can be claimed at this time."
NCJ 252950; National Criminal Justice 252950
National Criminal Justice Reference Service: https://www.ncjrs.gov/