Mechanisms of Cannabidiol and Sleep in the Context of Alcohol Use

Inclusion Criteria: * Able to provide informed consent * Self reported poor sleep quality (PSQI score \>5) * Hazardous or harmful levels of alcohol consumption (MINI AUD score ≧2) * No current moderate or severe alcohol withdrawal symptoms (CIWA-Ar) * For female participants of childbearing potential: Not pregnant or lactating at the time of study enrollment or trying to become pregnant as confirmed by urine preg. Lack of childbearing potential confirmed by a history of amenorrhea for at least 12 consecutive months and serum FSH level within the laboratory's reference range for postmenopausal females OR documented bilateral oophorectomy and/or hysterectomy * For female participants of childbearing potential: Agree to use a highly effective contraception method (i.e., a method with a failure rate of less than 1 percent per year when used consistently and correctly) starting at least five days before you begin the study and continuing for full participation. * No current use of sleep medications including CBD in the last 90 days * No history of complicated alcohol withdrawal (i.e., seizure, delirium tremens, or alcohol hallucinosis). * No current or past 6 months active suicidal ideation or suicidal behavior * No current diagnosis, or family history of diagnosis, of psychosis; current major psychiatric illness, such as bipolar disorder, major depression, or schizophrenia * No current cannabis use disorder (MINI SUD for cannabis score ≧2) * History of previous exposure to guaio…