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Showing 1–24 of 51 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: sodium phenylbutyrate Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

Double-Blind Randomized Crossover Trial to Access Electrocardiogram Effects of HPN-100

NCT01135680
View directory record Official record
Conditions
Drug Toxicity
Interventions
HPN-100, HPN-100 or Placebo, Placebo, Moxifloxacin
Drug
Lead sponsor
Amgen
Industry
Eligibility
18 Years to 45 Years
Enrollment
98 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 19, 2024 · Synced Sep 25, 2026, 1:29 AM EDT
Withdrawn Phase 2 Interventional

Phenylbutyrate and Valganciclovir in Treating Patients With Relapsed or Refractory Epstein-Barr Virus-Positive Cancer

NCT00387530
View directory record Official record
Conditions
Gastric Cancer, Head and Neck Cancer, Lymphoma, Lymphoproliferative Disorder
Interventions
oral sodium phenylbutyrate, valganciclovir, polymerase chain reaction, protein expression analysis, biopsy
Drug · Genetic · Procedure
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Aug 1, 2019 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 2 Interventional Results available

Dose-Escalation Safety Study of HPN-100 to Treat Urea Cycle Disorders

NCT00551200
View directory record Official record
Conditions
Urea Cycle Disorders
Interventions
HPN-100, BUPHENYL®
Drug
Lead sponsor
Amgen
Industry
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
2
States / cities
Minneapolis, Minnesota • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 9, 2024 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 2 Interventional Results available

A Study of Safety and Efficacy of HPN-100 in Subjects With Cirrhosis and Episodic Hepatic Encephalopathy

NCT00999167
View directory record Official record
Conditions
Cirrhosis, Hepatic Encephalopathy
Interventions
HPN-100, Placebo
Drug
Lead sponsor
Amgen
Industry
Eligibility
18 Years and older
Enrollment
189 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
28
States / cities
Palo Alto, California • Washington D.C., District of Columbia • Miami, Florida + 21 more
Source: ClinicalTrials.gov public record
Updated Jul 9, 2024 · Synced Sep 25, 2026, 1:29 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Phenylbutyrate/Genistein Duotherapy in Delta F508-Heterozygotes (for Cystic Fibrosis)

NCT00590538
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Sodium 4-Phenylbutyrate, Genistein (Unconjugated Isoflavones 100), Placebo
Drug
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2008
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 29, 2011 · Synced Sep 25, 2026, 1:29 AM EDT
Recruiting Phase 2 Interventional

METabolic MODulation to Enhance Insulin Sensitivity and Mitochondrial Function in Type 1 Diabetes (MetMod-T1D)

NCT07699380
View directory record Official record
Conditions
Type 1 Diabetes (T1D), Metabolic Diseases, Glucose Metabolism Disorders, Endocrine System Diseases, Autoimmune Diseases, Immune System Diseases, Diabetes Melletus, Type 1, Nutritional and Metabolic Diseases, Combination Therapy
Interventions
AMX0035, Placebo
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 69 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 14, 2026 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 4 Interventional Results available

To Evaluate the Safety of Long-term Use of HPN-100 in the Management of Urea Cycle Disorders (UCDs)

NCT01257737
View directory record Official record
Conditions
Urea Cycle Disorders
Interventions
HPN-100
Drug
Lead sponsor
Amgen
Industry
Eligibility
1 Year and older
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
15
States / cities
Los Angeles, California • Palo Alto, California • Aurora, Colorado + 12 more
Source: ClinicalTrials.gov public record
Updated Aug 21, 2024 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 2 Interventional

5-Azacytidine and Phenylbutyrate to Treat Severe Thalassemia

NCT00005934
View directory record Official record
Conditions
Beta Thalassemia
Interventions
5-Azacytidine
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
Not listed
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 25, 2026, 1:29 AM EDT
Enrolling by invitation Phase 1 Interventional

An Individual Patient, Open Label Study to Use ACER-001 to Treat Combined D,L-2 Hydroxyglutaric Aciduria (C-2HGA)

NCT07125066
View directory record Official record
Conditions
Combined D,L-2-hydroxyglutaric Aciduria
Interventions
Sodium phenylbutyrate
Drug
Lead sponsor
Jerry Vockley, MD, PhD
Other
Eligibility
Male only
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Sep 25, 2026, 1:29 AM EDT
Terminated Phase 1Phase 2 Interventional

Phase I-II Study of Fluorouracil in Combination With Phenylbutyrate in Advanced Colorectal Cancer

NCT00002796
View directory record Official record
Conditions
Mucinous Adenocarcinoma of the Colon, Mucinous Adenocarcinoma of the Rectum, Recurrent Colon Cancer, Recurrent Rectal Cancer, Signet Ring Adenocarcinoma of the Colon, Signet Ring Adenocarcinoma of the Rectum, Stage IVA Colon Cancer, Stage IVA Rectal Cancer, Stage IVB Colon Cancer, Stage IVB Rectal Cancer
Interventions
fluorouracil, sodium phenylbutyrate, indomethacin, recombinant interferon gamma
Drug · Biological
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
Not listed
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1997
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 31, 2013 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 2 Interventional

Phenylbutyrate Plus Azacitidine in Treating Patients With Acute Myeloid Leukemia, Myelodysplasia, Non-Hodgkin's Lymphoma, Multiple Myeloma, Non-small Cell Lung Cancer, or Prostate Cancer

NCT00006019
View directory record Official record
Conditions
Leukemia, Lung Cancer, Lymphoma, Multiple Myeloma and Plasma Cell Neoplasm, Myelodysplastic Syndromes, Prostate Cancer
Interventions
azacitidine, sodium phenylbutyrate
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2003
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 23, 2013 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 2 Interventional Results available

Study to Assess the Safety and Biological Activity of AMX0035 for the Treatment of Alzheimer's Disease

NCT03533257
View directory record Official record
Conditions
Alzheimer Disease
Interventions
AMX0035, Placebo
Drug
Lead sponsor
Amylyx Pharmaceuticals Inc.
Industry
Eligibility
55 Years to 89 Years
Enrollment
95 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
11
States / cities
Jacksonville, Florida • Orlando, Florida • Palmetto Bay, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Mar 6, 2025 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 2Phase 3 Interventional

AMX0035 and Progressive Supranuclear Palsy

NCT06122662
View directory record Official record
Conditions
Progressive Supranuclear Palsy, PSP, Neurodegenerative Diseases, Atypical Parkinsonism
Interventions
AMX0035, Placebo
Drug · Other
Lead sponsor
Amylyx Pharmaceuticals Inc.
Industry
Eligibility
40 Years to 80 Years
Enrollment
139 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
35
States / cities
Scottsdale, Arizona • Little Rock, Arkansas • Fountain Valley, California + 31 more
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 4 Interventional Results available

A Study of the Safety, Efficacy and Pharmacokinetics of Glycerol Phenylbutyrate in Pediatric Subjects Under 2 Years of Age With Urea Cycle Disorders

NCT02246218
View directory record Official record
Conditions
Urea Cycle Disorder
Interventions
RAVICTI
Drug
Lead sponsor
Amgen
Industry
Eligibility
1 Day to 2 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
16
States / cities
Los Angeles, California • Palo Alto, California • Washington D.C., District of Columbia + 13 more
Source: ClinicalTrials.gov public record
Updated Jun 30, 2024 · Synced Sep 25, 2026, 1:29 AM EDT
Approved For Marketing No phase listed Expanded access

An Intermediate Size Expanded Access Protocol of AMX0035 for ALS

NCT05286372
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
AMX0035
Drug
Lead sponsor
Amylyx Pharmaceuticals Inc.
Industry
Eligibility
18 Years and older
U.S. locations
20
States / cities
Los Angeles, California • Oakland, California • Fort Lauderdale, Florida + 14 more
Source: ClinicalTrials.gov public record
Updated Oct 17, 2022 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 1 Interventional

Phenylbutyrate and Tretinoin in Treating Patients With Hematologic Cancer

NCT00006239
View directory record Official record
Conditions
Leukemia, Myelodysplastic Syndromes, Myelodysplastic/Myeloproliferative Diseases
Interventions
sodium phenylbutyrate, tretinoin
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years to 120 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2005
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 28, 2017 · Synced Sep 25, 2026, 1:29 AM EDT
Active, not recruiting Early Phase 1 Interventional

Phenylbutyrate for Monogenetic Developmental and Epileptic Encephalopathy

NCT04937062
View directory record Official record
Conditions
STXBP1 Encephalopathy With Epilepsy, SLC6A1 Neurodevelopmental Disorder, Developmental and Epileptic Encephalopathy
Interventions
Glycerol Phenylbutyrate 1100 MG/ML [Ravicti]
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
0 Months to 17 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
2
States / cities
Aurora, Colorado • New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 2 Interventional

Safety and Tolerability Study of Phenylbutyrate in Huntington's Disease (PHEND-HD)

NCT00212316
View directory record Official record
Conditions
Huntington's Disease
Interventions
sodium phenylbutyrate
Drug
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
8
States / cities
Birmingham, Alabama • San Diego, California • Iowa City, Iowa + 5 more
Source: ClinicalTrials.gov public record
Updated Aug 14, 2012 · Synced Sep 25, 2026, 1:29 AM EDT
Not listed Phase 3 Interventional

Phase III Trial of AMX0035 for Amyotrophic Lateral Sclerosis Treatment

NCT05021536
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
Placebo, AMX0035
Other · Drug
Lead sponsor
Amylyx Pharmaceuticals Inc.
Industry
Eligibility
18 Years and older
Enrollment
664 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
28
States / cities
Phoenix, Arizona • Los Angeles, California • Orange, California + 23 more
Source: ClinicalTrials.gov public record
Updated Aug 13, 2024 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 2Phase 3 Interventional

A Compassionate Use Protocol of AMX0035 for Treatment of Patients With Amyotrophic Lateral Sclerosis (ALS)

NCT04516096
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
AMX0035
Drug
Lead sponsor
Amylyx Pharmaceuticals Inc.
Industry
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
5
States / cities
San Francisco, California • Boston, Massachusetts • Worcester, Massachusetts + 2 more
Source: ClinicalTrials.gov public record
Updated Apr 6, 2023 · Synced Sep 25, 2026, 1:29 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Glycerol Phenylbutyrate Corrector Therapy For CF (Cystic Fibrosis)

NCT02323100
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Ravicti low dose, Placebo
Drug
Lead sponsor
National Jewish Health
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
3
States / cities
Denver, Colorado • Baltimore, Maryland • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 1 Interventional

Safety and Tolerability of Phenylbutyrate in Inclusion Body Myositis

NCT04421677
View directory record Official record
Conditions
Inclusion Body Myositis, Sporadic Inclusion Body Myositis
Interventions
Phenylbutyrate Oral Tablet
Drug
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 2 Interventional Results available

Arginine and Buphenyl in Patients With Argininosuccinic Aciduria (ASA), a Urea Cycle Disorder

NCT00345605
View directory record Official record
Conditions
Argininosuccinic Aciduria, Amino Acid Metabolism, Inborn Errors, Urea Cycle Disorders
Interventions
Sodium Phenylbutyrate, Arginine
Drug
Lead sponsor
Brendan Lee
Other
Eligibility
5 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 30, 2018 · Synced Sep 25, 2026, 1:29 AM EDT
Completed Phase 1 Interventional Results available

Use of Ravicti™ in Patients With MCAD Deficiency With the 985A>G (K304E) Mutation

NCT01881984
View directory record Official record
Conditions
Medium-chain Acyl-CoA Dehydrogenase (MCAD) Deficiency
Interventions
Ravicti
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 24, 2017 · Synced Sep 25, 2026, 1:29 AM EDT