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Washington Paid Clinical Trials
A listing of 1729 clinical trials in Washington actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
949 - 960 of 1729
Washington is currently home to 1729 active clinical trials, seeking participants for engagement in research studies. These trials take place at a variety of cities in the state, including Seattle, Spokane, Tacoma and Vancouver. Whether you're a healthy volunteer interested in paid medical research or someone seeking trials related to a specific condition, the state offers a diverse array of opportunities in your vicinity.
Featured Trial
Healthy Participants Needed (Colonoscopy + Cancer Screening)
Recruiting
Earn $325 - $475 in electronic payment card compensation for your time and effort by participating in a clinical study to develop a blood test that may one day help screen for colon cancer. Take a quick quiz to see if you qualify.
Conditions:
Healthy
Healthy Volunteers
Healthy Subjects
Healthy Volunteer
Healthy Participants
Featured Trial
Paid Clinical Studies Nationwide
Recruiting
Nationwide clinical trials offered in your area. Some trials offering up to several thousand dollars in compensation for participation.
Conditions:
Healthy
Healthy Volunteer Study
Featured Trial
Buy Retatrutide Online Through Celia
Recruiting
Retatrutide (formerly M25) is an investigational peptide being studied for its potential in supporting weight management and metabolic health. It acts on GLP-1, GIP, and glucagon receptors to influence appetite, energy regulation, and fat metabolism.
Conditions:
Healthy
Featured Offer
Find the Best GLP-1 Weight Loss Providers (2025)
Recruiting
Cutting-edge GLP-1 treatments like semaglutide and tirzepatide are helping thousands lose weight with medically guided support. But with so many online providers, how do you know which programs are trusted, affordable, and right for you?
We reviewed the top GLP-1 brands of 2025 — comparing pricing, prescription process, shipping, pharmacy partners, and real user ratings — to help you find a safe, convenient, and effective path toward your weight-loss goals.
- 100% online programs
- Licensed U.S. clinicians
- Fast shipping & flexible payments
See the rankings & choose the GLP-1 provider that fits your life.
We reviewed the top GLP-1 brands of 2025 — comparing pricing, prescription process, shipping, pharmacy partners, and real user ratings — to help you find a safe, convenient, and effective path toward your weight-loss goals.
- 100% online programs
- Licensed U.S. clinicians
- Fast shipping & flexible payments
See the rankings & choose the GLP-1 provider that fits your life.
Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
Featured Trial
Depression Clinical Trial
Recruiting
Join us in researching a potential investigational treatment for Depression. Reimbursement for study-related expenses may be available to you.
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Conditions:
Depression
Major Depressive Disorder
Depressive Disorder
Depressive Symptoms
Depressive Disorder
VITAS: Atezolizumab in Combination With Chemotherapy for Pediatric Relapsed/Refractory Solid Tumors
Recruiting
This trial is a multi-center, non-randomized, open-label Phase I/II study evaluating the feasibility and efficacy of vincristine, irinotecan, temozolomide, and atezolizumab in children with relapsed/refractory solid tumors.
Gender:
ALL
Ages:
Between 6 months and 30 years
Trial Updated:
06/18/2025
Locations: Seattle Children's, Seattle, Washington
Conditions: Solid Tumor, Rhabdomyosarcoma
Predicting the Quality of Response to Specific Treatments in Patients With cGVHD, PQRST Study
Recruiting
This trial collects clinical data and blood samples to predict the quality of response to specific treatments in patients with chronic graft-versus-host disease (cGVHD) who are about to start a new therapy. Collecting and analyzing clinical data and blood samples from patients with cGVHD before and after treatment initiation may help doctors identify changes that may predict treatment response.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: Fred Hutch/University of Washington Cancer Consortium, Seattle, Washington
Conditions: Chronic Graft Versus Host Disease
Study of Autologous Tumor Infiltrating Lymphocytes in Patients With Solid Tumors
Recruiting
A prospective, open-label, multi-cohort, non-randomized, multicenter Phase 2 study evaluating adoptive cell therapy (ACT) with TIL \[LN-144/LN-145 (lifileucel)\] in combination with immune checkpoint inhibitors or TIL \[LN-144/LN-145 (lifileucel) and LN-145-S1\] as a single agent therapy.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: Fred Hutchinson Cancer Research Center, Seattle, Washington
Conditions: Metastatic Melanoma, Squamous Cell Carcinoma of the Head and Neck, Non-small Cell Lung Cancer
JoLT-Ca Sublobar Resection (SR) Versus Stereotactic Ablative Radiotherapy (SAbR) for Lung Cancer
Recruiting
To Determine if SAbR improves survival over SR in High Risk Operable Stage I NSCLC
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: Swedish Cancer Institute, Seattle, Washington
Conditions: Non-Small Cell Lung Cancer
Study of ABX-002 for the Adjunctive Treatment of Major Depressive Disorder (AMPLIFY)
Recruiting
The goal of this clinical trial is to learn if ABX-002 added to an existing antidepressant treatment will benefit depression symptoms in adults with moderate to severe major depressive disorder who have had an inadequate response to their antidepressant.
This is a double-blind, placebo-controlled, 2-arm, parallel-group, Phase 2 study, randomized 1:1 (ABX-002: placebo).
The study will include the following stages:
1. Screening, approximately 35 days
2. 42-day Treatment Period
3. 2-week post do... Read More
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
06/17/2025
Locations: Autobahn Site #143, Bellevue, Washington
Conditions: Major Depressive Disorder
GATE-251 or Placebo for the Reduction of Symptoms of Major Depressive Disorder
Recruiting
The goal of this clinical trial is to learn if GATE-251 works to treat depression in adults. It will also learn about the safety of GATE-251. The main questions it aims to answer are:
Does GATE-251 reduce depression scores in participants compared to participants who take a placebo (a look-alike tablet that contains no GATE-251)?
What medical problems are observed in participants who take GATE-251?
Participants will take one tablet of GATE-251 or placebo every week for 6 weeks. Participants w... Read More
Gender:
ALL
Ages:
Between 18 years and 64 years
Trial Updated:
06/17/2025
Locations: Northwest Clinical Research Center, Bellevue, Washington
Conditions: Major Depressive Disorder
Fasedienol Nasal Spray for the Acute Treatment of Anxiety in Adults With Social Anxiety Disorder (PALISADE-3)
Recruiting
This U.S. Phase 3 clinical trial is designed to evaluate the efficacy, safety, and tolerability of the acute intranasal (i.n.) administration of Fasedienol Nasal Spray (fasedienol) (3.2 µg) to relieve symptoms of acute anxiety in adult subjects ages 18 through 65 with Social Anxiety Disorder induced by a public speaking challenge (PSC) in a clinical setting. In addition, safety and tolerability of i.n. administration of 3.2 µg of fasedienol, as-needed, up to 6 times per day for up to 12 months,... Read More
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
06/17/2025
Locations: Vistagen Clinical Site, Everett, Washington
Conditions: Social Anxiety Disorder
Study on Efficacy and Safety of Givinostat Versus Hydroxyurea in Patients With Polycythemia Vera
Recruiting
The goal of this clinical trial is to compare the efficacy and safety of givinostat to hydroxyurea in Jak2V617F-positive high risk polycythemia vera patients.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/17/2025
Locations: VA Puget Sound Health Care System - NAVREF - PPDS, Seattle, Washington
Conditions: Polycythemia Vera
Evaluating Treatments for Suicidal Veterans With PTSD
Recruiting
Posttraumatic Stress Disorder (PTSD) is a significant driver of suicide risk among Veterans, but there is a critical knowledge gap about how to treat PTSD among people at elevated risk for suicide. Although evidence-based treatments for PTSD reduce suicide risk, Veterans at high risk for suicidal behavior rarely receive these potentially life-saving treatments. Prior research suggests that a treatment that combines Dialectical Behavior Therapy (DBT) with the DBT Prolonged Exposure protocol (DBT... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/17/2025
Locations: VA Puget Sound Health Care System Seattle Division, Seattle, WA, Seattle, Washington
Conditions: Self-directed Violence, Post-traumatic Stress Disorder (PTSD)
An Extension Study to Assess Long-Term Safety and Tolerability of Adjunctive KarXT in Subjects With Inadequately Controlled Symptoms of Schizophrenia
Recruiting
This is a Phase 3, multicenter, 52-week, outpatient, open-label extension (OLE) study to evaluate the long-term safety and tolerability of adjunctive KarXT in subjects with schizophrenia with an inadequate response to their current antipsychotic treatment who previously completed the treatment period (Visit 8/Day 42 ± 3) of ARISE Study (KAR-012). The primary objective of the study is to assess the long-term safety and tolerability of adjunctive KarXT (a fixed dose combination of xanomeline and t... Read More
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
06/17/2025
Locations: Northwest Clinical Research Center, Bellevue, Washington
Conditions: Schizophrenia
ALTUS: Performance of a Multi- Target Hepatocellular Carcinoma (HCC) Test in Subjects With Increased Risk
Recruiting
The primary objective is to assess overall sensitivity and specificity of Oncoguard™ Liver for hepatocellular cancer (HCC) detection in a surveillance population.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/17/2025
Locations: Washington Gastroenterology - Bellevue, Bellevue, Washington
Phase 1/2 Study of REGN5458 in Adult Patients With Relapsed or Refractory Multiple Myeloma
Recruiting
The main purpose of this study is to learn about the safety of REGN5458 and to find out what is the best dose of REGN5458 to give to patients with multiple myeloma. An additional purpose is to look for any signs that REGN5458 can treat cancer.
The study is looking at several other research questions, including:
* Side effects that may be experienced by people receiving REGN5458
* How REGN5458 works in the body
* How much REGN5458 is present in the blood
* How REGN5458 may work to treat cancer
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/17/2025
Locations: Swedish Cancer Institute, Seattle, Washington
Conditions: Multiple Myeloma
