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Opioid Antagonist

Naltrexone for Anxiety (SSO Trial)

Phase < 1
Waitlist Available
Led By Naomi Eisenberger, Ph.D.
Research Sponsored by University of California, Los Angeles
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Be between 18 and 65 years old
Timeline
Screening 3 weeks
Treatment Varies
Follow Up 24 hours following the completion of the fear extinction procedure (during a follow-up fear reinstatement session).

Summary

This trial is testing whether the drug naltrexone eliminates the ability of social support figure reminders to help with fear extinction.

Who is the study for?
Healthy adults aged 18-35 with no history of mental illness or chronic physical conditions, not pregnant, and without liver disease. Participants must be fluent in English and comfortable swallowing pills. Those with a history of substance abuse or on certain medications are excluded.
What is being tested?
The study is testing if naltrexone blocks the positive effects of social support during fear extinction training. Half will receive naltrexone, half a placebo, before being exposed to cues associated with an electric shock alongside images of social support figures.
What are the potential side effects?
Naltrexone may cause nausea, headache, dizziness, anxiety, tiredness or trouble sleeping which could affect participants' response to fear extinction tasks.

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~directly following a fear extinction procedure (during the experiment session).
This trial's timeline: 3 weeks for screening, Varies for treatment, and directly following a fear extinction procedure (during the experiment session). for reporting.

Treatment Details

Study Objectives

Study objectives can provide a clearer picture of what you can expect from a treatment.
Primary study objectives
Fear Response 24-hours post-extinction
Fear Response directly post-extinction

Trial Design

2Treatment groups
Active Control
Placebo Group
Group I: NaltrexoneActive Control1 Intervention
Group II: PlaceboPlacebo Group1 Intervention

Find a Location

Who is running the clinical trial?

National Institute of Mental Health (NIMH)NIH
2,928 Previous Clinical Trials
2,744,959 Total Patients Enrolled
92 Trials studying Anxiety
41,994 Patients Enrolled for Anxiety
University of California, Los AngelesLead Sponsor
1,567 Previous Clinical Trials
10,266,940 Total Patients Enrolled
36 Trials studying Anxiety
38,457 Patients Enrolled for Anxiety
Naomi Eisenberger, Ph.D.Principal InvestigatorUniversity of California, Los Angeles
~15 spots leftby Dec 2025