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Distinguishing Alcohol Intoxication, Cannabis Intoxication and Co-intoxication Using Electroencephalography (EEG)

Colorado State University · NCT06259916

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Opens the official ClinicalTrials.gov record, with the study team’s contacts. Bored Studies doesn’t enroll anyone.

Key facts

Compensation
Not posted. Ask the study team before screening.
Who can join
Ages 21–50 · All sexes
Healthy volunteers
Accepted
Study type
Interventional · Not applicable
Target enrollment
99
US sites recruiting
1
Study start
January 5, 2024
Record last updated
August 11, 2026

Status re-checked against ClinicalTrials.gov within the last 12 hours.

What the study is about

This is a randomized, parallel-group study designed to explore the differences between cannabis intoxication, alcohol intoxication and co-intoxication involving both alcohol and cannabis, utilizing electroencephalography (EEG) as well as more traditional intoxication measures such as breath alcohol concentration and balance metrics. If eligible for the study, participants will be randomized to complete one study session in our mobile laboratory, during which they will use either alcohol, cannabis (which will be self-administered, ad libitum) or both alcohol and cannabis.

Being studied: Alcohol; Cannabis

Conditions: Cannabis Use; Alcohol Use, Unspecified

Eligibility criteria

Copied from the official record. The study team makes the final decision at screening.

Show full criteria

Inclusion Criteria

  • 21-50 years old
  • 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

  • Daily tobacco users
  • 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.

Recruiting US locations

  • Colorado State University

    Fort Collins, CO 80523

    Site contact: Hollis C. Karoly, PhD

Study contacts (from the official record)

  • Hollis C Karoly, PhD · 970-491-3677 · hollis.karoly@colostate.edu
  • Patricia Davies, PhD · (970) 491-7294 · patricia.davies@colostate.edu
All healthy volunteers studies in Colorado →
Distinguishing Alcohol Intoxication, Cannabis Intoxication and… (NCT06259916) | Bored Studies