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California Paid Clinical Trials
A listing of 5602 clinical trials in California actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
901 - 912 of 5602
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California is currently home to 5602 active clinical trials, seeking participants for engagement in research studies. These trials take place at a variety of cities in the state, including Los Angeles, San Francisco, San Diego and Sacramento. 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
Study of Perioperative Dostarlimab in Participants With Untreated T4N0 or Stage III dMMR/MSI-H Resectable Colon Cancer
Recruiting
The primary purpose of this study is to evaluate the efficacy of perioperative dostarlimab compared with standard of care (SOC) in participants with untreated T4N0 or Stage III (resectable), defective mismatch repair/ microsatellite instability high (dMMR/MSI-H) colon cancer.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/07/2025
Locations: GSK Investigational Site, Los Angeles, California
Conditions: Colonic Neoplasms, Neoplasms, Colon
The Rhythm Evaluation for AntiCoagulaTion With Continuous Monitoring of Atrial Fibrillation
Recruiting
REACT-AF is a multicenter prospective, randomized, open-label, blinded endpoint (PROBE design), controlled trial comparing the current Standard Of Care (SOC) of continuous Direct Oral Anticoagulation (DOAC) use versus time-delimited (1 month) DOAC guided by an AF-sensing Smart Watch (AFSW) in participants with a history of paroxysmal or persistent Atrial Fibrillation (AF) and low-to-moderate stroke risk.
Gender:
ALL
Ages:
Between 22 years and 85 years
Trial Updated:
08/07/2025
Locations: University of Southern California - Keck School of Medicine, Los Angeles, California
Conditions: Atrial Fibrillation
Breast Cancer Survivorship Biorepository
Recruiting
This study collects blood samples as well as clinical and self-report data from stage I-III breast cancer survivors to create a biorepository for future use. The creation of this biorepository will allow for future research into links between individual, molecular, and genomic signatures and cancer outcomes.
Gender:
FEMALE
Ages:
18 years and above
Trial Updated:
08/07/2025
Locations: USC / Norris Comprehensive Cancer Center, Los Angeles, California
Conditions: Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Invasive Breast Carcinoma
Open Label, Long-term Study Evaluating Safety and Efficacy of Subcutaneous Amlitelimab in Participants Aged 12 Years and Older With Moderate to Severe Atopic Dermatitis
Recruiting
This is a single group, 1-arm, long-term safety study for treatment of participants with moderate to severe atopic dermatitis (AD).
The purpose of this study is to characterize the long-term safety and efficacy of amlitelimab in treated participants with age ≥12 years old with moderate to severe AD.
The study duration per participant will be up to 180 weeks, including:
* A screening period of up to 2 to 4 weeks
* An open label treatment period of up to 160 weeks (approximately 3 years)
* A po... Read More
Gender:
ALL
Ages:
12 years and above
Trial Updated:
08/07/2025
Locations: University Dermatology Trials, INC.- Site Number : 8400052, Newport Beach, California
Conditions: Dermatitis Atopic
A Study to Investigate the Efficacy and Safety of Dupilumab Therapy Compared With Placebo in Participants Aged ≥18 Years With Moderately to Severely Active Ulcerative Colitis With an Eosinophilic Phenotype (LIBERTY-UC SUCCEED (Study in UC for Clinical Efficacy Evaluation of Dupilumab))
Recruiting
The protocol of this Phase 2 clinical trial consists of a double-blind, placebo-controlled, parallel-group, multicenter study to evaluate the efficacy and safety of dupilumab in participants with moderately to severely active Ulcerative Colitis (UC) with an eosinophilic phenotype.
Screening period: 2 to up to 4 weeks
Treatment period:
52-week investigational medicinal product (IMP) intervention (dupilumab or matching placebo) from Week 0 to Week 52 Open-label arm (optional): administration of... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/07/2025
Locations: Om Research- Site Number : 8400029, Apple Valley, California
Conditions: Colitis Ulcerative
Efficacy and Safety of Tozorakimab in Patients Hospitalised for Viral Lung Infection Requiring Supplemental Oxygen
Recruiting
The purpose of this study is to evaluate the effect of tozorakimab, as an add-on to SoC in patients with viral lung infection requiring supplemental oxygen, on the prevention of death or progression to IMV/ECMO.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/07/2025
Locations: Research Site, Chula Vista, California
Conditions: Viral Lung Infection and Acute Respiratory Failure
A Study to Assess Effectiveness and Safety of Deucravacitinib Compared With Placebo in Participants With Active Systemic Lupus Erythematosus (SLE)
Recruiting
The purpose of this study is to evaluate the effectiveness and safety of deucravacitinib compared with placebo in an active moderate to severe Systemic Lupus Erythematosus (SLE) population.
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
08/07/2025
Locations: Kaiser Permanente, Fontana, California
Conditions: Systemic Lupus Erythematosus
Study of RYZ101 in Combination With SoC in Subjects With SSTR+ ES-SCLC
Recruiting
This study aims to determine the safety, preliminary antitumor activity, and pharmacokinetics (PK) of RYZ101 in combination with standard of care (SoC) therapy consisting of carboplatin + etoposide + atezolizumab in untreated subjects with somatostatin receptor expressing (SSTR+) ES-SCLC.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/07/2025
Locations: Research Facility, Los Angeles, California
Conditions: SCLC,Extensive Stage
Bortezomib and Pembrolizumab With or Without Pelareorep for the Treatment of Relapsed or Refractory Multiple Myeloma, AMBUSH Trial
Recruiting
This phase I/II trial studies the safety of the combination of bortezomib, dexamethasone, and pembrolizumab with or without pelareorep in treating patients with multiple myeloma that has come back (relapsed) or does not response to treatment (refractory). Chemotherapy drugs, such as bortezomib and dexamethasone, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Immunotherapy with monoclonal... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/07/2025
Locations: Los Angeles County-USC Medical Center, Los Angeles, California
Conditions: Recurrent Plasma Cell Myeloma, Refractory Plasma Cell Myeloma
A Study of the Efficacy and Safety of DMX-200 in Patients With FSGS Who Are Receiving an ARB
Recruiting
DMX-200 (repagermanium) is a C-C chemokine receptor type 2 (CCR2) inhibitor that, when administered concurrently with an ARB, is designed to inhibit recruitment of monocytes implicated in the inflammatory chemokine environment of chronic disease. The purpose of this pivotal randomized double-blind study is to investigate the efficacy and safety of DMX-200 120 mg twice daily (BID) compared with placebo over a treatment period of 104 weeks in adult patients with FSGS who are being treated with an... Read More
Gender:
ALL
Ages:
Between 12 years and 80 years
Trial Updated:
08/07/2025
Locations: Loma Linda University Medical Center, Loma Linda, California
Conditions: FSGS
A Study to Assess the Long-term Safety and Clinical Activity of mRNA-3927 in Participants Previously Enrolled in the mRNA-3927-P101 Study
Recruiting
The main purpose of this study is to evaluate the long-term safety of mRNA-3927 administered to participants with propionic acidemia (PA) who have previously participated in Study mRNA-3927-P101 (NCT04159103).
Gender:
ALL
Ages:
1 year and above
Trial Updated:
08/07/2025
Locations: Ronald Reagan UCLA Medical Center, Los Angeles, California
Conditions: Propionic Acidemia
Efficacy of the COronary SInus Reducer in Patients With Refractory Angina II
Recruiting
To demonstrate the safety and effectiveness of the Shockwave Reducer for treatment of patients with refractory angina pectoris treated with maximally tolerated guideline-directed medical therapy who demonstrate objective evidence of reversible myocardial ischemia in the distribution of the left coronary artery and who are deemed unsuitable for revascularization. A non-randomized single-arm registry will further assess the safety and effectiveness of the Shockwave Reducer in selected subjects wit... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/07/2025
Locations: Long Beach VA Medical Center, Long Beach, California
Conditions: Refractory Angina
901 - 912 of 5602
Kaiser Permanente houses over 6,000 physicians in southern California and it is also one of the largest research centers on the state. On its clinical trial division, Kaiser Permanente conducts clinical trials of almost every specialty funded by pharmaceutical companies, government, and foundations.
The Cedars-Sinai Medical Center located in Los Angeles is one of the largest research centers owned and operated by a private hospital in the United States. Focusing on biomedical, cancer, and heart research among other specialties, you can find almost any type of clinical trials for both health and non-healthy volunteers at the research division of Cedar-Sinai Medical Center.
There are around 100,000 clinical trials happening every year across the United States about almost every condition out there. While most clinical trials are testing drugs or medical devices there are also many behavioral and observational trials going on at any point in time. Many paid research studies are held at these California locations.
Clinical trials are incredibly important for making new medical and scientific discoveries, finding new and better methods for diagnosing medical conditions early, testing new interventions, and even developing safer and more effective surgical procedures.
In order for all these discoveries to me made available to the general population they need to go through years of rigorous testing both in healthy and non-healthy volunteers. During those years, medical professionals follow a protocol that has been previously approved by the FDA or other regulatory agency to test the effectiveness and safety of their discovery.
Other people choose to participate in a clinical trial because they feel it is a good way to contribute to the advancement of medical knowledge and that their participation can help many people in the future. The following lists of trials are broken down by condition, and to find a specific clinical trial in your area click through to clinicaltrials.gov.
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