Location · Washington
Clinical trials recruiting in Washington
461 recruiting studies have at least one site in Washington; 121 accept healthy volunteers. Studies that need a specific condition are included too, so check each listing.
Want the research companies that run paid Phase 1 studies for healthy volunteers? Paid clinical trial companies in Washington.
461 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- RecruitingHealthy volunteersPhase 1/Phase 2
Phase 1/2 Study of Respiratory Syncytial Virus and Human Metapneumovirus (RSV+HMPV) Vaccine Candidate in Adults 60 Years of Age and Older
Sanofi
- Location
- Seattle, WA + 49 other US sites
- Eligibility basics
- Ages 60+
- RecruitingHealthy volunteersPhase 1/Phase 2
A Study of Investigational RSV/hMPV Combination and Investigational hMPV Vaccines in Younger and Older Adults
GlaxoSmithKline
- Location
- Seattle, WA + 2 other US sites
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteersPhase 1/Phase 2
A Study on the Safety and Immune Response of a Urinary Tract Infection (UTI) Vaccine in Adults 18-64 Years of Age and Clinical Efficacy in Females 18-64 Years of Age
GlaxoSmithKline
- Location
- Seattle, WA + 5 other US sites
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteersPhase 1/Phase 2
Study of VGA039 in Healthy Volunteers and Patients With Von Willebrand Disease (VIVID)
Vega Therapeutics, Inc
- Location
- Seattle, WA + 9 other US sites
- Eligibility basics
- Ages 12–60
- RecruitingHealthy volunteersEarly Phase 1
Contribution of UGT2B17 to the Pharmacokinetics of Diclofenac
Washington State University
- Location
- Spokane, WA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 1
KABAWIL: Reducing Intersectional Stigmas
University of Washington
- Location
- Seattle, WA
- Eligibility basics
- Ages 18+
- 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
Evaluating a Potential Pharmacokinetic Kratom-oxycodone Interaction Concurrent With Clinical Endpoints
Washington State University
- Location
- Spokane, WA
- Eligibility basics
- Ages 21–45
- RecruitingHealthy volunteersPhase 1/Phase 2
Chemotherapy (Decitabine in Combination With FLAG-Ida) and Total-Body Irradiation Followed by Donor Stem Cell Transplant for the Treatment of Adults With Myeloid Malignancies at High Risk of Relapse
Fred Hutchinson Cancer Center
- Location
- Seattle, WA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 4Overnight stay mentioned
Simethicone as Part of ERAS in Bariatric Surgery Patients
Madigan Army Medical Center
- Location
- Tacoma, WA
- Eligibility basics
- Ages 18–89
- RecruitingHealthy volunteersPhase 3
A Study of Aleniglipron in Adults With Obesity or Overweight and Type 2 Diabetes Mellitus (ACCOMPLISH-2)
Gasherbrum Bio, Inc., a wholly owned subsidiary of Structure Therapeutics
- Location
- Renton, WA + 55 other US sites
- Eligibility basics
- Ages 18–79
- RecruitingHealthy volunteersPhase 3
A Phase 3 Study of Revaccination in Subsequent Pregnancies With Bivalent RSV Vaccine and Duration of Protection of a Single Dose
Pfizer
- Location
- Seattle, WA + 76 other US sites
- Eligibility basics
- Ages 0 mo+
- RecruitingHealthy volunteers
Contraceptive Efficacy Study of Ovaprene
Daré Bioscience, Inc.
- Location
- Seattle, WA + 3 other US sites
- Eligibility basics
- Ages 18–40 · Women only
- RecruitingHealthy volunteers
A Study to Test the Repeatability and Reproducibility in Rod Intercept Time Within the AdaptDx Pro in Healthy Subjects With Normal Vision (FlashForward)
AdaptDx, Inc.
- Location
- Silverdale, WA
- Eligibility basics
- Ages 22–49
- RecruitingHealthy volunteers
Observational Study of Decentralized Urine Optical Interaction Patterns Associated With Environmental Microplastic and Nanoplastic Exposure
Ecotera Health LLC
- Location
- Seattle, WA + 50 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Within-Subject Comparison of Adipose Tissue Viability Following Liposuction
Apyx Medical
- Location
- Olympia, WA + 1 other US site
- Eligibility basics
- Ages 30–65
- RecruitingHealthy volunteers
Metatranscriptomic Markers of Colonic Neoplasia
Viome
- Location
- Bothell, WA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Comparative Self-collection for Cervical Cancer Screening Pivotal Study
Mel Mont Medical
- Location
- Lynnwood, WA + 10 other US sites
- Eligibility basics
- Ages 25–65 · Women only
- RecruitingHealthy volunteers
Safety and Effectiveness Evaluation of the High-intensity Focused Ultrasound Device for Lifting Lax Submental and Neck Tissue
CLASSYS Inc.
- Location
- Spokane, WA + 4 other US sites
- Eligibility basics
- Ages 30–65
- RecruitingHealthy volunteers
Autologous Hair Follicle Derived Secretome as Adjunct to Aesthetic Procedures
Acorn Biolabs Inc.
- Location
- Vancouver, WA + 18 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 2
Effects of NLS-133, a Potential Non-Hormonal "On-Demand" Male Contraceptive
Next Life Sciences
- Location
- Seattle, WA
- Eligibility basics
- Ages 18–55 · Men only
- RecruitingHealthy volunteers
Development of a Quantifiable Ultrasound Biomarker for Hepatic Steatosis
ContextVision AB
- Location
- Seattle, WA
- Eligibility basics
- Ages 18–75
- RecruitingHealthy volunteers
Collection and Analyses of Physiological, Physical, and Molecular Data From a Diverse Population
Viome
- Location
- Bothell, WA
- Eligibility basics
- Any age listed