Distinguishing Alcohol Intoxication, Cannabis Intoxication and Co-intoxication Using Electroencephalography (EEG)
NCT ID: NCT06259916
Last Updated: 2025-11-13
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
NA
99 participants
INTERVENTIONAL
2024-01-05
2026-05-30
Brief Summary
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
OTHER
NONE
Study Groups
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Cannabis Group
Participants in this group will self-administer their own flower cannabis product (that they purchased for use in the study from a legal-market dispensary) ad libitum inside their homes. Researchers will not handle the product or instruct participants on how much to use during the session.
Cannabis
Participants in this group will self-administer legal-market flower cannabis
Alcohol Group
Participants in this group will be administered a dose of alcohol by researchers in our mobile lab. The dose is designed (based on participant sex and body weight) to bring blood alcohol concentration to .06 g/dL.
Alcohol
Participants in this condition will receive the standard alcohol dose
Alcohol + Cannabis Group
Participants in this group will first self-administer their own flower cannabis product (that they purchased for use in the study from a legal-market dispensary) ad libitum inside their homes. Researchers will not handle the product or instruct participants on how much to use during the session. They will then return to the mobile lab which will be parked outside their residence and will be administered a dose of alcohol by researchers. The dose is designed (based on participant sex and body weight) to bring blood alcohol concentration to .06 g/dL.
Alcohol
Participants in this condition will receive the standard alcohol dose
Cannabis
Participants in this group will self-administer legal-market flower cannabis
Interventions
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Alcohol
Participants in this condition will receive the standard alcohol dose
Cannabis
Participants in this group will self-administer legal-market flower cannabis
Eligibility Criteria
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Inclusion Criteria
* Heavy drinkers (consuming more than 4 drinks/day or more than 14 drinks/week for men, or more than 3 drinks/day or more than 7 drinks/week for women)
* Regular users of legal-market flower cannabis (at least 2x/week in past 3 months)
* report simultaneously using alcohol and legal-market flower cannabis at least once per month in the past 3 months
* English speakers.
Exclusion Criteria
* Diagnosed with or seeking treatment for alcohol use disorder (AUD) or other substance use disorder (SUD)
* Females cannot be pregnant, breastfeeding or trying to become pregnant
* Meet criteria for psychotic, bipolar or major depressive disorder with suicidal ideation, or history of these disorders, 5) Current use of psychotropic (except anti-depressants)
* Report illicit drug use in past 60-days or fail drug screen on the day of the study appointment
* Major medical condition contraindicating alcohol and/or cannabis consumption.
21 Years
50 Years
ALL
Yes
Sponsors
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Colorado State University
OTHER
Responsible Party
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Principal Investigators
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Hollis Karoly, PhD
Role: PRINCIPAL_INVESTIGATOR
Colorado State University
Patricia Davies, PhD
Role: PRINCIPAL_INVESTIGATOR
Colorado State University
Locations
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Colorado State University
Fort Collins, Colorado, United States
Countries
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Central Contacts
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Facility Contacts
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Hollis C. Karoly, PhD
Role: primary
Other Identifiers
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5061
Identifier Type: -
Identifier Source: org_study_id