Independent directory Public ClinicalTrials.gov records United States
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ClinicalTrials.gov public records Last synced Sep 3, 2026, 1:00 PM EDT

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Showing 1–24 of 128 matching trials from the live ClinicalTrials.gov search.
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Conditions
Alzheimer's Disease, Pseudobulbar Affect (PBA)
Interventions
Nuedexta (20/10)
Drug
Lead sponsor
St. Joseph's Hospital and Medical Center, Phoenix
Other
Eligibility
55 Years to 90 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Phoenix, Arizona
Conditions
Rett Syndrome
Interventions
dextromethorphan, donepezil hydrochloride
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
1 Year to 15 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
Baltimore, Maryland
Conditions
Treatment Resistant Depression, Major Depressive Disorder
Interventions
AXS-05, Placebo
Drug
Lead sponsor
Axsome Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
20
States / cities
Little Rock, Arkansas • Redlands, California • Sherman Oaks, California + 17 more
Conditions
Fatigue, Unspecified Adult Solid Tumor, Protocol Specific, Unspecified Childhood Solid Tumor, Protocol Specific
Interventions
dextromethorphan hydrobromide
Drug
Lead sponsor
University of Medicine and Dentistry of New Jersey
Other
Eligibility
12 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
2
States / cities
Hamilton, New Jersey • New Brunswick, New Jersey
Conditions
Agitation in Patients With Dementia of the Alzheimer's Type, Alzheimer Disease, Agitation,Psychomotor
Interventions
AXS-05, Placebo
Drug
Lead sponsor
Axsome Therapeutics, Inc.
Industry
Eligibility
65 Years to 90 Years
Enrollment
178 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
61
States / cities
Sun City, Arizona • Tucson, Arizona • Chula Vista, California + 55 more
Conditions
Central Neuropathic Pain, Multiple Sclerosis
Interventions
AVP-923-45, AVP-923-30, AVP-923-20, Placebo
Drug
Lead sponsor
Avanir Pharmaceuticals
Industry
Eligibility
18 Years to 85 Years
Enrollment
209 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
44
States / cities
Cullman, Alabama • Phoenix, Arizona • Berkeley, California + 40 more
Conditions
Obsessive-Compulsive Disorder, Illness Anxiety Disorder, Body Dysmorphic Disorders, Somatic Symptom Disorder
Interventions
Fluoxetine, Dextromethorphan
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Stanford, California
Conditions
Fibromyalgia, Primary
Interventions
Psilocybin, Dextromethorphan
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
25 Years to 65 Years · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Birmingham, Alabama
Conditions
Neurodegenerative Disease, Parkinson's Disease
Interventions
dextromethorphan
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1993 – 2001
U.S. locations
1
States / cities
Bethesda, Maryland
Conditions
Sickle Cell Disease
Interventions
Dextromethorphan, Codeine, Morphine
Drug
Lead sponsor
Children's National Research Institute
Other
Eligibility
7 Years to 18 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2012
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Conditions
Pseudobulbar Affect (Involuntary Laughing and/or Crying)
Interventions
NUEDEXTA®
Drug
Lead sponsor
Avanir Pharmaceuticals
Industry
Eligibility
18 Years to 90 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
2
States / cities
Miami, Florida • Centerville, Ohio
Conditions
Smoking Cessation
Interventions
AXS-05 (dextromethorphan-bupropion), Bupropion, Placebo
Drug
Lead sponsor
Axsome Therapeutics, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
705 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
9
States / cities
Little Rock, Arkansas • Jacksonville, Florida • Orlando, Florida + 6 more
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of MNTX on CYP450 2D6 in Metabolizers of Dextromethorphan

NCT01367535
Conditions
Healthy Adults
Interventions
SC Methylnaltrexone (MNTX), IV Methylnaltrexone (MNTX), Oral Paroxetine, SC Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
Tarrytown, New York
Conditions
Carcinoma, Non-Small-Cell Lung, Mesothelioma
Interventions
LBH589
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2007
U.S. locations
4
States / cities
Fayetteville, Arkansas • Augusta, Georgia • Chicago, Illinois + 1 more
Conditions
Major Depressive Disorder, Treatment Resistant Depression, Depression
Interventions
AXS-05 (dextromethorphan and bupropion) oral tablets
Drug
Lead sponsor
Axsome Therapeutics, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
876 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
51
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Bellflower, California + 46 more
Conditions
Active Ulcerative Colitis
Interventions
Afimkibart, Caffeine, Warfarin, Omeprazole, Dextromethorphan, Midazolam, Vitamin K
Drug · Other
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years to 60 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
3
States / cities
Chula Vista, California • Miami, Florida
Conditions
Huntington Disease, Irritability
Interventions
Dextromethorphan/quinidine 20mg/10mg (DM/Q 20mg/10mg), Placebo
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Houston, Texas
Conditions
Voice Disorders
Interventions
Dextromethorphan, Lorazepam
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years to 80 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Conditions
Schizophrenia
Interventions
AVP-786, Placebo
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
18 Years to 60 Years
Enrollment
145 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
17
States / cities
Cerritos, California • Garden Grove, California • National City, California + 14 more
Conditions
Relapsing-Remitting Multiple Sclerosis
Interventions
Midazolam, Caffeine, S-warfarin, Vitamin K, Omeprazole, Dextromethorphan, BIIB019 (Daclizumab)
Drug · Other · Biological
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 65 Years
Enrollment
133 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
7
States / cities
Centennial, Colorado • Washington D.C., District of Columbia • Lake Barrington, Illinois + 4 more
Conditions
Gulf War Illness
Interventions
naltrexone, Dextromethorphan
Drug
Lead sponsor
East Carolina University
Other
Eligibility
18 Years to 100 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Greenville, North Carolina
Conditions
Healthy Adult Male and Female Volunteers
Interventions
AVP-923
Drug
Lead sponsor
Avanir Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Overland Park, Kansas
Conditions
Advanced Malignant Solid Tumors
Interventions
PF-00299804
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
2
States / cities
Buffalo, New York • San Antonio, Texas
Conditions
Huntington Disease, Alzheimer Disease
Interventions
Dextromethorphan, Dimebon + Dextromethorphan
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
New Haven, Connecticut