Alcohol 
When, how, and what happens when marijuana is used in combination with alcohol. (ADAI, 2018)

Cannabis Substitute for Opioids 
Science-based information on the role of medicinal cannabis as a substitute for opioids in control of chronic pain. (ADAI, 2018)

Tobacco 
Prevalence, characteristics, and effects of co-use of tobacco and cannabis. (ADAI, 2017)