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Showing 1–24 of 228 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: N-acetyl cysteine Clear all
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Neuroscience-Informed Treatment Development for Adolescent Alcohol Use

NCT03238300
View directory record Official record
Conditions
Alcohol Drinking, Control
Interventions
N-Acetylcysteine, Placebo Oral Capsule
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
15 Years to 19 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 21, 2023 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Phase 2 Interventional Results available

Oxidative Stress and Surgical Recovery

NCT04732000
View directory record Official record
Conditions
Surgical Recovery, Pain, Postoperative
Interventions
N-acetyl cysteine, Normal Saline
Drug · Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Apr 29, 2025 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Effect of Sublingually Generated S-nitroso-N-acetylcysteine on Systemic Blood Pressure.

NCT05798481
View directory record Official record
Conditions
Hypertension, Cardiovascular Diseases
Interventions
Mixture of Sodium Nitrite and N-acetylcysteine (NAC) crytals.
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
21 Years to 80 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Nov 25, 2025 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Phase 2 Interventional Results available

N-Acetyl Cysteine in Trichotillomania

NCT00354770
View directory record Official record
Conditions
Trichotillomania
Interventions
Placebo, N-Acetyl Cysteine
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 22, 2023 · Synced Sep 22, 2026, 9:54 AM EDT
Not listed Not applicable Interventional

Diabetic Retinopathy Functional Evaluation Study: Monitoring Carotenoid Vitamins Treatment Using ERG

NCT04117022
View directory record Official record
Conditions
Diabetes, Diabetic Retinopathy
Interventions
DVS supplementation
Dietary Supplement
Lead sponsor
ZeaVision, LLC
Industry
Eligibility
21 Years to 80 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
2
States / cities
Pomona, California • Tahlequah, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 22, 2021 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Phase 2 Interventional Results available

The Role of N-acetyl-l-cysteine (NAC) as an Adjuvant to Opioid Treatment in Patients With Chronic Neuropathic Pain

NCT01840345
View directory record Official record
Conditions
Neuropathic Pain
Interventions
N-acetyl-l-cysteine
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years to 65 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated May 13, 2018 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Antioxidant Treatment of Type 2 Diabetes

NCT00609102
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Placebo, n-aceylcysteine
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 70 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Dec 23, 2014 · Synced Sep 22, 2026, 9:54 AM EDT
Active, not recruiting Early Phase 1 Interventional

Glutathione, Brain Metabolism and Inflammation in Alzheimer's Disease

NCT04740580
View directory record Official record
Conditions
Alzheimer Disease
Interventions
Glycine, N-acetylcysteine, Alanine
Dietary Supplement
Lead sponsor
Baylor College of Medicine
Other
Eligibility
55 Years to 85 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 8, 2026 · Synced Sep 22, 2026, 9:54 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

NAC-003 P.L.U.S. Program (Progress Through Learning Understanding & Support)

NCT01370954
View directory record Official record
Conditions
Early Memory Loss, Mild Cognitive Impairment, Alzheimer's Disease, Vascular Dementia
Interventions
CerefolinNAC®
Other
Lead sponsor
Pamlab, Inc.
Industry
Eligibility
50 Years to 80 Years
Enrollment
204 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Hickory, North Carolina
Source: ClinicalTrials.gov public record
Updated May 8, 2013 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Phase 2 Interventional Results available

N-Acetyl Cysteine Plus Naltrexone in Methamphetamine Dependence

NCT00332605
View directory record Official record
Conditions
Methamphetamine Dependence
Interventions
Naltrexone plus N-Acetyl Cysteine, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 65 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 22, 2022 · Synced Sep 22, 2026, 9:54 AM EDT
Not listed Phase 4 Interventional

Nebulized N-Acetyl Cysteine for Bronchiolitis in Inpatient Hospital Use

NCT03364218
View directory record Official record
Conditions
Bronchiolitis Acute
Interventions
N-Acetyl Cysteine
Drug
Lead sponsor
Carilion Clinic
Other
Eligibility
1 Week to 2 Years
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Roanoke, Virginia
Source: ClinicalTrials.gov public record
Updated Sep 25, 2019 · Synced Sep 22, 2026, 9:54 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Pilot Study: Impact of Biomarker-Guided Dietary Supplementation on Quality-of-Life Measures in Subjects With Chronic Pain

NCT06247813
View directory record Official record
Conditions
Chronic Pain
Interventions
Inflammation Support Formula, Nerve Health Formula, Redox Support Formula
Dietary Supplement
Lead sponsor
Ethos Research & Development
Industry
Eligibility
18 Years to 75 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Newport, Kentucky
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Phase 1 Interventional

Open Label Study: Treatment of ALS Fatigue With PolyMVA

NCT04557410
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
PolyMVA
Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
Not listed
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated May 26, 2021 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Phase 2 Interventional Results available

N-Acetylcysteine for Adolescent Alcohol Use Disorder

NCT03707951
View directory record Official record
Conditions
Alcohol Use Disorder
Interventions
N-acetylcysteine, Placebo oral capsule
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
13 Years to 25 Years
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jan 7, 2025 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

n-Acetylcysteine and Cocaine

NCT02141620
View directory record Official record
Conditions
Cocaine Abuse, Cocaine Dependence
Interventions
Cocaine, n-Acetylcysteine, Placebo
Drug
Lead sponsor
University of Kentucky
Other
Eligibility
18 Years to 55 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Jan 3, 2017 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Phase 2 Interventional Results available

Imaging GABAergic/Glutamatergic Drugs in Bipolar Alcoholics Alcoholics

NCT03220776
View directory record Official record
Conditions
Alcohol Use Disorder, Bipolar Disorder
Interventions
N-Acetylcysteine, Gabapentin, Placebo Oral Tablet
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 65 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 12, 2023 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Not applicable Interventional Results available

A Pilot Trial of Acute N-Acetylcysteine Effects on Working Memory and Other Cognitive Functions in Schizophrenia

NCT01232790
View directory record Official record
Conditions
Schizophrenia
Interventions
N-Acetylcysteine, Placebo
Dietary Supplement · Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 60 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Nov 30, 2015 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Phase 3 Interventional Results available

Use of N-Acetylcysteine (NAC) in Fingernail Biting

NCT01993849
View directory record Official record
Conditions
Onychophagia
Interventions
N-Acetylcysteine (NAC), Placebo
Drug · Other
Lead sponsor
Kevin Gray, MD
Other
Eligibility
18 Years to 30 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 2, 2018 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Glutathione and Fuel Oxidation in Aging

NCT01870193
View directory record Official record
Conditions
Aging
Interventions
Glycine, cysteine (as n-acetylcysteine), alanine
Dietary Supplement
Lead sponsor
Rajagopal V Sekhar
Other
Eligibility
21 Years to 80 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 14, 2023 · Synced Sep 22, 2026, 9:54 AM EDT
Recruiting Phase 2 Interventional

Efficacy of Rifaximin With NAC in IBS-D

NCT06727422
View directory record Official record
Conditions
IBS (Irritable Bowel Syndrome), IBS-D (Diarrhea-predominant)
Interventions
rifaximin 66mg + N-acetylcysteine 560mg three times daily, RNIB21 containing rifaximin 132mg + N-acetylcysteine 560mg three times daily, Placebo
Drug
Lead sponsor
Mark Pimentel, MD
Other
Eligibility
18 Years and older
Enrollment
225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 19, 2026 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Phase 2 Interventional Results available

N-acetylcysteine Plus Naltrexone for the Treatment of Alcohol Dependence

NCT01214083
View directory record Official record
Conditions
Alcoholism
Interventions
N-acetylcysteine + high-dose naltrexone (150 mg), High-dose naltrexone (150 mg) alone, Low-dose naltrexone (50 mg) alone
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 65 Years
Enrollment
111 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
2
States / cities
West Haven, Connecticut • Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 7, 2020 · Synced Sep 22, 2026, 9:54 AM EDT
Terminated Phase 3 Interventional Results available

Acetaminophen in aSAH to Inhibit Lipid Peroxidation and Cerebral Vasospasm

NCT00585559
View directory record Official record
Conditions
Aneurysmal Subarachnoid Hemorrhage, Cerebral Vasospasm
Interventions
Placebos for acetaminophen and N-acetylcysteine, APAP 1 gm every 6 hours and N-acetylcysteine placebo, NAC IV infusion at 0.5 gm hourly and APAP placebo, APAP 1 gm q6 hours, plus NAC IV infusion at 0.5 gm hourly, APAP 1.5 gm q6 hours, plus NAC IV infusion at 0.5 gm hourly
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
20 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2023
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 17, 2025 · Synced Sep 22, 2026, 9:54 AM EDT
Recruiting Phase 2 Interventional

Targeting Reactive Oxygen Species Production as a Novel Therapeutic in Fuch's Endothelial Corneal Dystrophy

NCT04440280
View directory record Official record
Conditions
Fuchs Endothelial Corneal Dystrophy
Interventions
N-acetyl cysteine (NAC) 10% solution, N-acetyl cysteine (NAC) 20% solution, Visine Dry Eye Relief eye drops
Drug
Lead sponsor
Massachusetts Eye and Ear Infirmary
Other
Eligibility
21 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 22, 2026, 9:54 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Glutathione and Function in HIV Patients

NCT02348775
View directory record Official record
Conditions
HIV Infection, Erythrocyte Glutathione Deficiency
Interventions
GlyNAC (combination of glycine and n-acetylcysteine)
Dietary Supplement
Lead sponsor
Baylor College of Medicine
Other
Eligibility
45 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 20, 2021 · Synced Sep 22, 2026, 9:54 AM EDT