Laboratory Smoking of Marijuana "Blunts"

Inclusion Criteria: * Currently living in Baltimore City or Baltimore County, MD; * Able to read, understand, and sign informed consent; * 18-55 years old; * Currently smokes marijuana blunts; * Designation of Medically Healthy for Research by the Study Physician; and * Willing to abstain from illicit drug use other than marijuana for the duration of the study. Exclusion Criteria: * BAC \> 0.020% as measured by alcohol breathalyzer; * Meets DSM-5 criteria for severe current or lifetime Cannabis Use Disorder; * Meets DSM-5 criteria for any current Axis I disorder, other than current mild or moderate Cannabis Use Disorder; * Self-reported current desire to stop marijuana use; * Self-reported current asthma, chronic obstructive pulmonary disease, hypertension, cardiovascular disease or any other medical illness that precludes participation; * Has difficulties with blood draws or poor venous access; * History of blood donation in the past 30 days or receiving blood products within the past 2 months prior to any experimental visit; * Among females, current pregnancy or lactation or attempting to get pregnant, or at risk of becoming pregnant; * Acute illness which will require participant to be rescheduled