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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 16 of 297
- RecruitingHealthy volunteersPhase 1
A Study of Psychedelics in Healthy Older Adults With Low Well-being
Jennifer Mitchell
- Location
- San Francisco, CA
- Eligibility basics
- Ages 50–85
- RecruitingHealthy volunteersPhase 1
Evaluation of Oral THC and CBD in Men and Women
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 21–55
- RecruitingHealthy volunteersPhase 1
Vaporized Cannabis Administration and Co-Administration of Alcohol on Impairment
Johns Hopkins University
- Location
- Baltimore, MD
- Eligibility basics
- Ages 21+
- RecruitingHealthy volunteersEarly Phase 1
Randomized Directly Observed Therapy Study to Interpret Clinical Trials of Doxy-PEP
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1
High Potency Cannabis: Acute and Protracted Effects
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 21–55
- RecruitingHealthy volunteersEarly Phase 1
Sympathetic Transduction in Obesity-associated Hypertension (OB-HTN)
University of Texas Southwestern Medical Center
- Location
- Dallas, TX
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersPhase 1
The Pharmacokinetics of a Hemp-Based Topical Product
Johns Hopkins University
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersPhase 1
Alpelisib Challenge Test (ACT)
Columbia University
- Location
- New York, NY
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteersEarly Phase 1
Zinc Oxide Versus Petrolatum Following Skin Surgery
Melissa Pugliano-Mauro
- Location
- Pittsburgh, PA, PA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1
Genetic Basis of the Risk and Consequences of Cannabis Exposure in Humans
Yale University
- Location
- West Haven, CT
- Eligibility basics
- Ages 21–60
- RecruitingHealthy volunteersEarly Phase 1
PET Imaging of Natriuretic Peptide Receptor C (NPR-C) in Carotid Atherosclerosis With 64Cu-NODAGA-CANF (Volunteer - Dosimetry Study)
Washington University School of Medicine
- Location
- St Louis, MO
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1/Phase 2
Phase I/II Trial: Engineered Donor Graft (Orca Q) for Pediatric Hematopoietic Cell Transplant (HCT)
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Up to age 50
- RecruitingHealthy volunteersPhase 1
Ivosidenib and Ruxolitinib in Patients With Advanced Myeloproliferative Neoplasms (MPNs) That Have an IDH1 Gene Mutation
University of Chicago
- Location
- Chicago, IL + 1 other US site
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1
Optimizing Transcranial Magnetic Stimulation for Stimulant Use Disorder
University of Minnesota
- Location
- Minneapolis, MN
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1
A Study of Safety and Drug Levels of ePGT121v1-LS, PGDM1400LS, and VRC07-523LS in Adult Participants Without HIV-1
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Birmingham, AL + 4 other US sites
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersPhase 1
Safety and Tolerability Study of VVZ-2471 in Healthy Volunteers
Virginia Commonwealth University
- Location
- Richmond, VA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersEarly Phase 1
LpD3.5 Intervention Study in Older Adults- LISA-I Trial
University of South Florida
- Location
- Tampa, FL
- Eligibility basics
- Ages 60+
- RecruitingHealthy volunteersOvernight stay mentioned
Functional Magnetic Resonance Imaging Sleep Study With Auditory Stimuli
National Institute of Neurological Disorders and Stroke (NINDS)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–34
- RecruitingHealthy volunteersEarly Phase 1
Cardiovascular Effects of Very Low Nicotine Content Cigarettes
Wake Forest University Health Sciences
- Location
- Winston-Salem, NC
- Eligibility basics
- Ages 21+
- RecruitingHealthy volunteersOvernight stay mentioned
The Impact of Heavy Alcohol Use on Saliva and Oral Health
National Institutes of Health Clinical Center (CC)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteersPhase 1
KABAWIL: Reducing Intersectional Stigmas
University of Washington
- Location
- Seattle, WA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1
Safety and Pharmacokinetics Study of PGT121.414.LS Alone and in Combination With VRC07-523LS in Infants Exposed to HIV-1
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Aurora, CO + 4 other US sites
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteersPhase 1
Human Models of Selective Insulin Resistance: Alpelisib, Part I
Columbia University
- Location
- New York, NY
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteersEarly Phase 1
Evaluation of [18F]GATT-44 for Positron Emission Tomography Imaging of the GABA Transporter-1
Yale University
- Location
- New Haven, CT
- Eligibility basics
- Ages 18–60
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