Urea Cycle Disorder Clinical Trials

9 recruitingLast updated: May 13, 2026

There are 9 actively recruiting urea cycle disorder clinical trials across 8 countries. Studies span Not Applicable, Phase 1, Phase 2. Top locations include Washington D.C., District of Columbia, United States, Houston, Texas, United States, Aurora, Colorado, United States. Updated daily from ClinicalTrials.gov.


Urea Cycle Disorder Trials at a Glance

9 actively recruiting trials for urea cycle disorder are listed on ClinicalTrialsFinder across 6 cities in 8 countries. The largest study group is Not Applicable with 1 trial, with the heaviest enrollment activity in Washington D.C., Houston, and Aurora. Lead sponsors running urea cycle disorder studies include Baylor College of Medicine, Children's National Research Institute, and iECURE, Inc..

Browse urea cycle disorder trials by phase

Treatments under study

About Urea Cycle Disorder Clinical Trials

Looking for clinical trials for Urea Cycle Disorder? There are currently 3 studies actively recruiting participants. Clinical trials offer access to new treatments before they are widely available, and every approved therapy in use today was first tested through a clinical trial.

Below you can browse trials, sign up for alerts when new Urea Cycle Disorder trials open, and view eligibility criteria for each study. Each listing includes the study phase, locations, and enrollment details.

Frequently Asked Questions

Common questions about Urea Cycle Disorder clinical trials

A clinical trial is a carefully designed research study that tests new medical treatments, drugs, devices, or approaches in human volunteers. Every approved medication and treatment available today was proven safe and effective through clinical trials.

All clinical trials are reviewed and approved by Institutional Review Boards (IRBs) — independent committees that evaluate patient safety. Trials follow strict protocols, and your health is monitored closely throughout. You can withdraw at any time.

Not necessarily. Many trials compare the new treatment against the current standard of care, meaning all participants receive active treatment. When placebos are used, they are typically combined with standard treatment, not given alone. The trial description will always specify the design.

Under the Affordable Care Act, most private insurers are required to cover routine patient care costs during a clinical trial. The sponsor typically covers the investigational treatment itself. Medicare also covers routine costs for qualifying trials.

Yes. Participation is completely voluntary. You can withdraw at any time, for any reason, without it affecting your access to standard medical care.

Each trial has specific eligibility criteria — including age, diagnosis, disease stage, prior treatments, and general health. Browse the trials listed above and check their eligibility sections. You can also contact the trial site directly to discuss your situation.

Showing 19 of 9 trials

Recruiting

A Clinical Study of Glycerol Phenylbutyrate in Chinese Patients With Urea Cycle Disorders

Urea Cycle Disorders
Tongji Hospital40 enrolled5 locationsNCT06904027
Recruiting
Phase 1Phase 2

An Open-label Study to Investigate ECUR-506 in Male Babies Less Than 9 Months of Age With Neonatal Onset OTC Deficiency

Ornithine Transcarbamylase DeficiencyOrnithine Transcarbamylase Deficiency DiseaseUrea Cycle Disorders, Inborn+1 more
iECURE, Inc.20 enrolled12 locationsNCT06255782
Recruiting
Not Applicable

Ureagenesis Analysis in Healthy Subjects and in Urea Cycle Disorder Patients

Urea Cycle Disorders
University Children's Hospital, Zurich100 enrolled1 locationNCT05671666
Recruiting

Hepatic Histopathology in Urea Cycle Disorders

Urea Cycle DisorderOrnithine Transcarbamylase DeficiencyCitrullinemia 1+7 more
Baylor College of Medicine70 enrolled2 locationsNCT04908319
Recruiting

Liver Disease in Urea Cycle Disorders

Urea Cycle DisorderOrnithine Transcarbamylase DeficiencyCitrullinemia 1+5 more
Baylor College of Medicine62 enrolled5 locationsNCT04612764
Recruiting

Long-term Follow-up (LTFU) Study of Participants in Any iECURE Protocol Using an Investigational Product (IP)

Ornithine Transcarbamylase DeficiencyOrnithine Transcarbamylase Deficiency DiseaseUrea Cycle Disorders, Inborn
iECURE, Inc.13 enrolled1 locationNCT06805695
Recruiting

Neuroimaging and Neuropsychological Outcomes in Urea Cycle Disorders

Urea Cycle Disorders
Children's National Research Institute56 enrolled1 locationNCT02935283
Recruiting

Longitudinal Study of Urea Cycle Disorders

Brain Diseases, Metabolic, InbornAmino Acid Metabolism, Inborn ErrorsUrea Cycle Disorders
Andrea Gropman1,500 enrolled15 locationsNCT00237315
Recruiting

Systemic Biomarkers of Brain Injury From Hyperammonemia

Urea Cycle DisorderOrganic AcidemiaMaple Syrup Urine Disease+3 more
Children's National Research Institute24 enrolled1 locationNCT04602325