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Can oxytocin curb opioid abuse? new study investigates

NCT ID NCT04218409

Knowledge-focused Sponsor: University of Florida Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This early-phase study at the University of Florida is testing whether combining oxytocin (a nasal spray) with the opioid oxycodone can reduce pain while lowering the drug's abuse potential. Forty-five healthy adults who have used opioids recreationally will take part in six lab sessions. Researchers will measure pain relief, subjective effects, and brain activity to see if the combination works better than either drug alone.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
oxytocin nasal spray and oxycodone oral tablets
What this could lead to
If successful, this could point toward a way to make opioid painkillers safer and less addictive.
What could go wrong
This is a very early, small lab study in healthy recreational users, not patients with chronic pain. Results may not translate to real-world use.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Early phase 1

The earliest testing in people: a first look at safety, in a very small group.

Participants

About 45 people

The number the study aims to enrol. It can still change while the study runs.

Started

Sep 2021

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

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 45 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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: * Individuals fluent in English will participate. * Must report recreational use of opioids. * Be within 20% of their ideal body weight. * Are not currently experiencing chronic pain (pain on most days during the past 3 months) * Have a systolic blood pressure of \<=140 and diastolic blood pressure of \<= 90, and a heart rate \<= 90 beats per minute. * Participants must also have a normal electrocardiogram (EKG) reading and bloodwork indicating no major health contraindications. Exclusion criteria: * Significant current physical disease or major psychiatric disorder. * No self-reported current interest in drug abuse treatment. * Women who are pregnant or nursing. * Any comorbid illicit substance use disorders or current clinically significant withdrawal for any abused drug excluding nicotine and caffeine. * Any conditions that preclude safety in the MRI scanner, such as: implanted electrical devices (e.g., cardiac pacemaker, neurostimulator); implanted metallic clips or pins (e.g., aneurysm clip); a history of working with metal (unless able to demonstrate participant is MRI safe), and claustrophobia.

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Conditions

The condition(s) this trial relates to.

Pain

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Pain

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • University of Florida

    RECRUITING

    Gainesville, Florida, 32611, United States

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