Small study reveals how alcohol boosts opioid effects
NCT ID NCT04300751
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at how alcohol and opioids (like prescription painkillers) affect people when taken together. Eleven healthy adults who use both substances but are not dependent on them took part. Researchers measured how much participants liked the drug combination and how drunk they felt. The goal was to better understand the risks of mixing alcohol and opioids.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1
The first testing in people. Mainly checks safety and dose, usually in a small group.
- Participants
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11 people
The number who actually took part.
- Started
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Mar 2021
- Finished
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Nov 2024
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
21 to 55 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Healthy adults ages 21-55 * Current non-medical use of opioids * Previous alcohol use Exclusion Criteria: * Physical dependence on opioids, alcohol, or benzodiazepines/sedative/hypnotics * Seeking treatment for drug use * Significant medical problems
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
University of Kentucky
Lexington, Kentucky, 40508, United States
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Other studies related to the condition(s) this trial covers.
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