Sleep pill may quiet Brain's cannabis cravings

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age 18-60 years, inclusive * Use cannabis daily or near daily and have been using cannabis consistently for at least the past year, by self-report * Meet criteria for cannabis use disorder (CUDIT-R scores greater than or equal to 8) * Female participants of childbearing potential must have a negative pregnancy test at the enrollment visit * Be able to read, speak, and understand the English language. English can be a second language, provided that the subject understands all the questions used in the assessment measures. * Access to a mobile device to complete daily surveys Exclusion Criteria: * Participants cannot have an acutely unstable medical or psychiatric illness * Medications with the potential to depress CNS function will be assessed by the PI or study physician and participants will be excluded as necessary * Participants cannot have a history of major head trauma resulting in cognitive impairment, seizure, or other neurological disorders * Presence of metallic foreign bodies such as cardiac pacemakers, perfusion pumps, aneurysm clips, metallic tattoos anywhere on the body, tattoos near the eye * Individuals with severe hepatic impairment will be excluded * Participants cannot be obese as determined by a Body Mass Index (BMI) or greater than 35 * Participants cannot be using a CYP3A inhibitor/inducer (metabolism by CYP3A is the major elimination pathway for suvorexant) * Participants cannot have a current cardiac disorder such as palpitations, tachycardia, and/or the use of the cardiac medication Digoxin * Participants cannot have narcolepsy * Participants cannot self-report complex sleep behaviors such as sleep driving, preparing and eating food, or making phone calls * Participants cannot be actively suicidal (current suicidal ideation with specific plan or intent) and/or report a suicide attempt or psychiatric hospitalization in the past year * Participants cannot have a current substance use disorder based on a DSM-V diagnosis and MINI Interview for Substance Use Disorders other than nicotine and cannabis and cannot meet criteria for moderate or severe alcohol use disorder * Pregnancy or breastfeeding: a negative pregnancy test is required at the enrollment visit * In the opinion of the investigators, not able to complete study procedures or safely participate in the study