Roughly 20.3 million people aged 12 and above were diagnosed with a substance use disorder (SUD) in the United States in the year 2018. This included 14.8 million people who had an alcohol use disorder (AUD) and 8.1 million who had an another drug use disorder, most commonly cannabis use disorder with 4.4 million people diagnosed1. With the changes in legislation regarding legalization of recreational cannabis use across the United States, the rates of cannabis use can only be expected to escalate, which may lead to greater potential health risks across all ages of users2–4. Not only are alcohol and cannabis use common separately, using both is also very prevalent and largely understudied. Subbaraman found that in comparing simultaneous versus separate use of alcohol and cannabis in adults who use both, using the two drugs simultaneously was two times as common as using them on separate occasions. Simultaneous use also depicted a higher frequency of cannabis and alcohol ingestion at higher quantities, leading to an increased risk of damaging consequences and potential for misuse5. Other studies place alcohol and marijuana
