Spain’s Universities of Leon and Oviedo found that “The gateway hypothesis holds that cannabis use increases other illegal substance use. Cannabis use duplicated the probabilities of tobacco and alcohol use.
Cannabis use increased 5 times the likelihood of use of other illegal drugs”.
Testing the cannabis gateway hypothesis in a national sample of Spanish adolescents
Highlights
- The gateway hypothesis holds that cannabis use increases other illegal substance use.
- Cannabis use duplicated the probabilities of tobacco and alcohol use.
- Cannabis use increased five times the likelihood of use of other illegal drugs.
Source https://www.sciencedirect.com/science/article/pii/S0306460323001466
Also see Cannabis and the Gateway Drug Theory: Correlation or Causation – Where does the Evidence Point?(DRR)