The study involves two screening visits and seven study sessions. Each study session will last about 10 hours. In these sessions, participants will consume alcohol, use a vaporizer that contains cannabis, and then complete various tests to measure different aspects of performance. Study completers can earn up to $2,660 ($2,910 for completing an optional component). Call (410) 550-6063 for details. Click on this link to see if you may be eligible: https://jhmi.co1.qualtrics.com/jfe/form/SV_eKCOr0Mjt681Zgq Principal Investigator: Tory Spindle (IRB00434441)