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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 20 of 297
- RecruitingHealthy volunteersEarly Phase 1
Measuring Acute Drug Demand in Humans
University of Maryland, Baltimore
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersEarly Phase 1
Psilocybin for Prolonged Grief Disorder
University of Virginia
- Location
- Charlottesville, VA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersEarly Phase 1
Gait Adaptation Study
Rutgers, The State University of New Jersey
- Location
- Newark, NJ
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteersEarly Phase 1
Spinal Cord Associative Plasticity Study
Columbia University
- Location
- New York, NY + 2 other US sites
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteersPhase 1
Cannabis and Opioid Use Disorder
Shanna Babalonis, PhD
- Location
- Lexington, KY
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersPhase 1/Phase 2
Behavioral Economic Attributes of Recreation
Rush University Medical Center
- Location
- Chicago, IL
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1
Study of the Safety, Tolerability, Electrophysiological Effects and Efficacy of DMT in Humans
Deepak C. D'Souza
- Location
- West Haven, CT
- Eligibility basics
- Ages 21–65
- RecruitingHealthy volunteersPhase 1
AB821 in Adult Participants With Locally Advanced or Metastatic Solid Tumors
Yale University
- Location
- New Haven, CT
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1/Phase 2
Post-operative Urinary Retention (POUR) Following Thoracic Surgery
Hackensack Meridian Health
- Location
- Hackensack, NJ
- Eligibility basics
- Ages 50+ · Men only
- RecruitingHealthy volunteersPhase 1
Protocol Title: Safety and Feasibility of Autologous CD34+ Hematopoietic Stem Cells Mobilization and Apheresis in Participants With RUNX1 Familial Platelet Disorder
M.D. Anderson Cancer Center
- Location
- Houston, TX
- Eligibility basics
- Ages 18–75
- RecruitingHealthy volunteersEarly Phase 1
Educational Support Group Program for Bilingual and Spanish-speaking Carepartners and People With Progressive Aphasia
University of Texas at Austin
- Location
- Austin, TX
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersEarly Phase 1
Suvorexant and Alcohol
William Stoops
- Location
- Lexington, KY
- Eligibility basics
- Ages 21–55
- RecruitingHealthy volunteersEarly Phase 1
Cocaine and Pentoxifylline (BED IN 47)
William Stoops
- Location
- Lexington, KY
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersEarly Phase 1
Exercise as an Immune Adjuvant for Allogeneic Cell Therapies
University of Arizona
- Location
- Tucson, AZ
- Eligibility basics
- Ages 21–55
- RecruitingHealthy volunteersPhase 1
Controlled Human Infection Study of Orally Administered Trichuris Trichiura Eggs in Naïve Adults
George Washington University
- Location
- Washington D.C., DC + 1 other US site
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteersEarly Phase 1
Attentional Mechanisms in SCD
Vanderbilt University Medical Center
- Location
- Nashville, TN
- Eligibility basics
- Ages 55+
- RecruitingHealthy volunteersEarly Phase 1
Effects of a Hemp Product on the Pharmacokinetics and Pharmacodynamics of Clopidogrel
Washington State University
- Location
- Spokane, WA
- Eligibility basics
- Ages 21–64
- RecruitingHealthy volunteersEarly Phase 1
Evaluating the Pharmacokinetics of Oregano and Potential Oregano-drug Interactions Using a Drug Cocktail Approach
Washington State University
- Location
- Spokane, WA
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteersEarly Phase 1
Brain Mechanisms Supporting Cannabis-induced Pain Relief
University of California, San Diego
- Location
- La Jolla, CA
- Eligibility basics
- Ages 21–65
- RecruitingHealthy volunteersEarly Phase 1
Evaluating a Potential Pharmacokinetic Kratom-oxycodone Interaction Concurrent With Clinical Endpoints
Washington State University
- Location
- Spokane, WA
- Eligibility basics
- Ages 21–45
- RecruitingHealthy volunteersOvernight stay mentioned
Clinical and Molecular Biomarker Studies in RAI1 (Retinoic Acid-Induced 1) -Related Disorders
Baylor College of Medicine
- Location
- Houston, TX
- Eligibility basics
- Ages 1 mo–80
- RecruitingHealthy volunteersEarly Phase 1
Imaging CRF X NOP Interactions in Alcohol Use Disorder
Rajesh Narendran
- Location
- Pittsburgh, PA
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersPhase 1
Assessment of Neuroinflammation in Central Inflammatory Disorders Using [F-18]DPA-714.
University of Alabama at Birmingham
- Location
- Birmingham, AL
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 1
TCRαβ-depleted Progenitor Cell Graft With Early Memory T-cell DLI, Plus Selected Use of Blinatumomab, in naïve T-cell Depleted Haploidentical Donor Hematopoietic Cell Transplantation for Hematologic Malignancies
St. Jude Children's Research Hospital
- Location
- Memphis, TN
- Eligibility basics
- Up to age 21
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