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7,120 recruiting studies with US sites, from the official ClinicalTrials.gov registry (refreshed Oct 26, 2026). No sign-up needed.
Most recently updated studies · page 21 of 297
- RecruitingHealthy volunteersPhase 1
Hormones, Outcomes, and Pain Pathways in Exercise Study
University of Houston
- Location
- Houston, TX
- Eligibility basics
- Ages 18–60 · Women only
- RecruitingHealthy volunteersEarly Phase 1
RESTOR: PK/PD mTORi Inhibition in Older Adults
The University of Texas Health Science Center at San Antonio
- Location
- San Antonio, TX
- Eligibility basics
- Ages 65–90
- RecruitingHealthy volunteersEarly Phase 1
Prospective Screening for Pancreatic Ductal Adenocarcinoma in High-Risk Individuals
Dana-Farber Cancer Institute
- Location
- Boston, MA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersOvernight stay mentioned
Experimental Approach to Test Predictions of Body Weight Regulation Models
Pennington Biomedical Research Center
- Location
- Baton Rouge, LA
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteersPhase 1
The Effects of Dietary Supplementation on Serum Protein Glycosylation
University of California, Davis
- Location
- Sacramento, CA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteersPhase 1
Rapalog Pharmacology (RAP PAC) Study
University of Wisconsin, Madison
- Location
- Madison, WI
- Eligibility basics
- Ages 55–89
- RecruitingHealthy volunteersPhase 1
Behavioral Pharmacology of Orally Administered THC and D-limonene
Johns Hopkins University
- Location
- Baltimore, MD
- Eligibility basics
- Ages 21–55
- RecruitingHealthy volunteersEarly Phase 1
Glutamatergic Adaptation to Stress as a Mechanism for Anhedonia and Treatment Response With Ketamine
Emory University
- Location
- Atlanta, GA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 1
TREAD: Time Restricted Eating Intervention for Alzheimer's Disease
University of California, San Diego
- Location
- San Diego, CA
- Eligibility basics
- Ages 60+
- RecruitingHealthy volunteersPhase 1
An Investigational Scan (hpMRI) for Monitoring Treatment Response in Patients With Thyroid Cancer and Other Malignancies of the Head and Neck Undergoing Radiation Therapy and/or Systemic Therapy
M.D. Anderson Cancer Center
- Location
- Houston, TX
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersEarly Phase 1
Impulsivity Domains and Subjective Response
Jessica Weafer
- Location
- Boston, MA + 1 other US site
- Eligibility basics
- Ages 21–25
- RecruitingHealthy volunteersEarly Phase 1
Regional Lipolysis and Adipocyte Lipolysis Protein Stimulation
Mayo Clinic
- Location
- Rochester, MN
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 1/Phase 2
Saci Nivo Rela for TNBC
Yale University
- Location
- New Haven, CT
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersEarly Phase 1
Multiparametric [18F]F-AraG Imaging in Post-Acute Sequelae of COVID-19 (PASC)
University of California, Davis
- Location
- Sacramento, CA + 1 other US site
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1
Study of KM-023 in Healthy Volunteers and Patients With Olmsted Syndrome.
Orvida Pharma (formerly Kamari Pharma)
- Location
- Chicago, IL
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersEarly Phase 1
Sensory Feedback and Hand Motor Adaptation
The Catholic University of America
- Location
- Washington D.C., DC
- Eligibility basics
- Ages 20–70
- RecruitingHealthy volunteersOvernight stay mentioned
Anesthetic Optimization in Pediatric LeFort Surgeries
Johns Hopkins University
- Location
- Baltimore, MD
- Eligibility basics
- Ages 14+
- RecruitingHealthy volunteersOvernight stay mentioned
Collection of SARS CoV-2 (COVID-19) Virus Secretions and Serum for Countermeasure Development
Tulane University
- Location
- New Orleans, LA + 1 other US site
- Eligibility basics
- Ages 6 mo–120
- RecruitingHealthy volunteersEarly Phase 1
Ketamine and Propofol NeuroImaging
Keith M Vogt
- Location
- Pittsburgh, PA
- Eligibility basics
- Ages 18–59
- RecruitingHealthy volunteersPhase 1
Experimental Infection of Hookworm-naïve Adults With Dermally-applied Infectious Necator Americanus Hookworm Larvae
Baylor College of Medicine
- Location
- Washington D.C., DC
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteersPhase 1
Sympatholysis in Chronic Kidney Disease
Emory University
- Location
- Decatur, GA
- Eligibility basics
- Ages 18–75
- RecruitingHealthy volunteersPhase 1/Phase 2
Enhancing Parasympathetic Activity to Improve Endothelial Dysfunction, Vascular Oxidative Stress in African Americans
Vanderbilt University Medical Center
- Location
- Nashville, TN
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteersEarly Phase 1
Weekly Isotretinoin vs Tetracycline for Moderate Acne
Medical University of South Carolina
- Location
- Charleston, SC
- Eligibility basics
- Ages 12+
- RecruitingHealthy volunteersPhase 1
Sex Differences in the Response to Abstinence From Alcohol.
Indiana University
- Location
- Indianapolis, IN
- Eligibility basics
- Ages 21–35
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