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Updated May 2026 · ClinicalTrials.gov

RECRUITINGPhase 4INTERVENTIONAL

Temporally-Resolved Electrophysiology of Acamprosate Treatment of Alcohol Use Disorder

Temporally-Resolved Electrophysiology of Acamprosate Treatment of Alcohol Use Disorder (NCT06269627) is a Phase 4 interventional studying Alcohol Use Disorder, sponsored by National Institute on Alcohol Abuse and Alcoholism (NIAAA). RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

Important: This information is not medical advice. Talk to your doctor about whether a clinical trial is right for you.

About This Trial

Background: Chronic heavy drinking can cause alcohol use disorder (AUD). AUD changes how the brain works. People with AUD may drink compulsively or feel like they cannot control their alcohol use. Acamprosate is an FDA-approved drug that reduces anxiety and craving in some, but not all, people with AUD. Objective: To learn more about how acamprosate affects brain function in people with AUD. Eligibility: People aged 21 to 65 years with moderate to severe AUD. Design: Participants will stay in the clinic for 21 days after a detoxification period of approximately 7 days. Acamprosate is a capsule taken by mouth. Half of participants will take this drug 3 times a day with meals. The other half will take a placebo. The placebo looks like the study drug but does not contain any medicine. Participants will not know which capsules they are taking. Participants will have a procedure called electroencephalography (EEG): A gel will be applied to certain locations on their scalp, and a snug cap will be placed on their head. The cap has sensors with wires. The sensors detect electrical activity in the brain. Participants will lie still and perform 2 tasks: they will look at different shapes and press a button when they see a specific one; and they will listen to tones and press dedicated buttons when they hear the corresponding tones. Participants will have 2 EEGs: 1 on day 2 and 1 on day 23 of their study participation. They may opt to have up to 4 more EEG studies (one on day 13 and one on each of the three follow-up visits) and 2 sleep studies, in which they would have sensors attached to their scalp while they sleep. Participants may have up to three follow-up visits for 6 months.

What Stage of Research Is This?

Phase 4 studies happen after a treatment has been approved by the FDA. They monitor long-term safety, real-world effectiveness, and any rare side effects that only emerge in larger populations over longer periods. Phase 4 results sometimes lead to label changes, additional warnings, or — rarely — withdrawal of approval.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

With a target enrollment of 48 participants, this is a small study — typical of early-phase research, rare-disease trials, or pilot studies designed to generate preliminary signal before a larger study is launched.

Who May Be Eligible (Plain English)

* Who May Qualify: In order to be eligible to participate in this study, an individual must meet all of the following criteria: 1. Age 21-65. In younger participants, the central nervous system has not sufficiently developed, whereas in older participants, degenerative changes may confound the studied measures. Moreover, the minimum legal drinking age is 21 years. 2. Enrolled in NIAAA natural history protocol 14-AA-0181. 3. Admitted to alcohol treatment program of NIAAA\* with moderate to severe alcohol use disorder by a clinician at the time of admission. 4. Determination by the attending physician or licensed practitioner caring for the patient that the patient s current clinical status is stable enough to provide willing to sign a consent form for research. - The determination of the severity of AUD is via Structured Clinical Interview for DSM-5 after particpant s enrollment. Who Should NOT Join This Trial: An individual who meets any of the following criteria will be excluded from participation in this study: 1. Use of naltrexone, disulfiram, benzodiazepines (except Oxazepam), antiepileptic compounds, antidepressants, or neuroleptics currently or within the last 4 weeks. Individuals treated with acamprosate in the last 4 weeks would also be excluded. 2. Pregnancy at admission (negative urine pregnancy test required). 3. History of head trauma associated with an unconscious state lasting more than 30 minutes, persistent sequelae, and/or cranial surgery. 4. History of epilepsy. 5. History of non-substance related psychotic disorders. 6. Contraindications for acamprosate (previously exhibited hypersensitivity to acamprosate calcium or any of its compounds; and/or severe renal impairment, manifested as creatinine clearance \<= 30 mL/min). 7. Positive screens for alcohol or any illicit drugs (except THC) after admission and alcohol detoxification via breathanalysis and urine drug screen. Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language
* INCLUSION CRITERIA: In order to be eligible to participate in this study, an individual must meet all of the following criteria: 1. Age 21-65. In younger participants, the central nervous system has not sufficiently developed, whereas in older participants, degenerative changes may confound the studied measures. Moreover, the minimum legal drinking age is 21 years. 2. Enrolled in NIAAA natural history protocol 14-AA-0181. 3. Admitted to alcohol treatment program of NIAAA\* with moderate to severe alcohol use disorder by a clinician at the time of admission. 4. Determination by the attending physician or licensed practitioner caring for the patient that the patient s current clinical status is stable enough to provide informed consent for research. * The determination of the severity of AUD is via Structured Clinical Interview for DSM-5 after particpant s enrollment. EXCLUSION CRITERIA: An individual who meets any of the following criteria will be excluded from participation in this study: 1. Use of naltrexone, disulfiram, benzodiazepines (except Oxazepam), antiepileptic compounds, antidepressants, or neuroleptics currently or within the last 4 weeks. Individuals treated with acamprosate in the last 4 weeks would also be excluded. 2. Pregnancy at admission (negative urine pregnancy test required). 3. History of head trauma associated with an unconscious state lasting more than 30 minutes, persistent sequelae, and/or cranial surgery. 4. History of epilepsy. 5. History of non-substance related psychotic disorders. 6. Contraindications for acamprosate (previously exhibited hypersensitivity to acamprosate calcium or any of its compounds; and/or severe renal impairment, manifested as creatinine clearance \<= 30 mL/min). 7. Positive screens for alcohol or any illicit drugs (except THC) after admission and alcohol detoxification via breathanalysis and urine drug screen.

Treatments Being Tested

DRUG

Acamprosate calcium

Two oral capsules (packaged as one) containing 666 mg of acamprosate calcium will be given three times a day (total daily dose: 1998 mg/day) for a total of 21 days.

OTHER

Placebo

Two oral capsules (packaged as one) containing 666 mg of inactive substance (e.g., sugar) will be given three times a day (total daily dose: 1998 mg/day) for a total of 21 days.

Locations (1)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

National Institutes of Health Clinical Center
Bethesda, Maryland, United States

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT06269627), the sponsor (National Institute on Alcohol Abuse and Alcoholism (NIAAA)), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT06269627 clinical trial studying?

Background: Chronic heavy drinking can cause alcohol use disorder (AUD). AUD changes how the brain works. People with AUD may drink compulsively or feel like they cannot control their alcohol use. Acamprosate is an FDA-approved drug that reduces anxiety and craving in some, but not all, people with AUD. Objective: To learn more about how acamprosate affects brain function in people with AUD. Eligibility: People aged 21 to 65 years with moderate to severe AUD. Design: Participants will stay in the clinic for 21 days after a detoxification period of approximately 7 days. Acamprosate is a… The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT06269627?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT06269627?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT06269627. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT06269627. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.