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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.
541 - 552 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
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Recruiting
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GLP-1 medications are scientifically backed to help individuals achieve significant weight loss—on average, 15-20% of body weight within a year.
As a valued user, you’re eligible for $50 off your first program with code policy-lab-50.
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 to Evaluate Tulisokibart for Hidradenitis Suppurativa (MK-7240-012)
Recruiting
This is a phase 2b randomized, double-blind, placebo-controlled study of the safety and efficacy of tulisokibart in participants with moderate to severe hidradenitis suppurativa. The primary hypothesis is that at least 1 dose of tulisokibart is superior to placebo with respect to the proportion of participants achieving a 50% reduction in Hidradenitis Suppurativa Clinical Response (HiSCR50) at Week 16 (ie, at end of double-blind treatment).
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
08/13/2025
Locations: Northridge Clinical Trials ( Site 0004), Northridge, California
Conditions: Hidradenitis Suppurativa
Efficacy and Safety of Maridebart Cafraglutide in Adult Participants With Type 2 Diabetes Mellitus Who Have Obesity or Are Overweight
Recruiting
The primary objective of this study is to demonstrate that maridebart cafraglutide is superior to placebo for percent change in body weight.
Gender:
ALL
Ages:
Between 18 years and 99 years
Trial Updated:
08/13/2025
Locations: San Fernando Valley Health Institute, Canoga Park, California
Conditions: Type 2 Diabetes Mellitus (T2DM), Obesity, Overweight
Evaluation of Maridebart Cafraglutide in Adult Participants Without Type 2 Diabetes Mellitus Who Have Obesity or Are Overweight
Recruiting
The primary objective of this study is to demonstrate that maridebart cafraglutide is superior to placebo for percent change in body weight.
Gender:
ALL
Ages:
Between 18 years and 99 years
Trial Updated:
08/13/2025
Locations: Ark Clinical Research- Tustin, Fountain Valley, California
Conditions: Obesity
A Study to Assess Adverse Events and Change in Disease Activity of Intravenously (IV) Infused ABBV-324 in Adult Participants With Hepatocellular Cancer (HCC) or Squamous-Cell Non-Small Cell Lung Cancer (LUSC)
Recruiting
HCC is a common cancer worldwide and a leading cause of cancer-related death. Lung cancer is the most frequently diagnosed cancer in the world, and the leading cause of cancer deaths. The purpose of this study is to assess adverse events and change in disease activity when ABBV-324 is given to adult participants to treat hepatocellular cancer (HCC) or squamous-cell non-small cell lung cancer (LUSC).
ABBV-324 is an investigational drug being developed for the treatment of HCC and LUSC. Study doc... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: City of Hope National Medical Center /ID# 270526, Duarte, California
Conditions: Hepatocellular Cancer, Squamous-Cell Non-Small Cell Lung Cancer
Odronextamab for the Treatment of Relapsed and Refractory Diffuse Large B-cell Lymphoma Before and After Chimeric Antigen Receptor T-cell Therapy
Recruiting
This phase II trial tests how well odronextamab works before and after standard of care (SOC) chimeric antigen receptor (CAR) T-cell therapy in treating patients with diffuse large B-cell lymphoma (DLBCL) that has come back after a period of improvement (relapsed) or that has not responded to previous treatment (refractory). CAR-T cell therapy is the SOC treatment most patients receive when other treatments have failed. CAR-T cell therapy is a type of treatment in which a patient's T cells (a ty... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: University of California Davis Comprehensive Cancer Center, Sacramento, California
Conditions: Recurrent Diffuse Large B-Cell Lymphoma, Recurrent Transformed Follicular Lymphoma to Diffuse Large B-Cell Lymphoma, Refractory Diffuse Large B-Cell Lymphoma, Refractory Transformed Follicular Lymphoma to Diffuse Large B-Cell Lymphoma
A Clinical Study of Intismeran Autogene (V940) and BCG in People With Bladder Cancer (V940-011/INTerpath-011)
Recruiting
Researchers are looking for new ways to treat people with high-risk non-muscle invasive bladder cancer (HR NMIBC). NMIBC is cancer in the tissue that lines the inside of the bladder but has not spread to the bladder muscle or outside of the bladder. High-risk means NMIBC may have a high chance of getting worse or coming back after treatment. HR NMIBC can also include carcinoma in situ (CIS). CIS is bladder cancer that appears flat and is only in the inner layer (surface) of the bladder. CIS is n... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: Michael G Oefelein Clinical Trials ( Site 0138), Bakersfield, California
Conditions: Urinary Bladder Neoplasms, Non-Muscle Invasive Bladder Neoplasms, Carcinoma in Situ
A Phase 1/2A, Randomized Study of a T Follicular Helper (TFH)-Targeting Genetic Vaccine Strategy Designed to Induce Broad, Durable Immune Responses
Recruiting
The goal of this clinical trial is to test two investigational COVID-19 booster vaccines, called CoTend-s3BXBB and CoTend-BXBB, in healthy volunteers ages 40-64. The CoTend-s3BXBB vaccine includes a component called "s3", which was designed to improve the body's response to the vaccine. CoTend-BXBB is the same vaccine without s3.
The main questions the study aims to answer are: 1) Is the investigational vaccine safe? 2) Does "s3" lead to bigger, broader, and longer-lasting responses to the vacc... Read More
Gender:
ALL
Ages:
Between 40 years and 64 years
Trial Updated:
08/13/2025
Locations: UCLA Westwood, Los Angeles, California
Conditions: COVID-19
Research With I-124 EVuzamitide to Elucidate Cardiac AmyLoidosis
Recruiting
The purpose of this Phase 3, open label, single dose imaging study is to evaluate the efficacy and safety of I-124 evuzamitide (radioactive dye) for diagnosing Cardiac Amyloidosis in participants with suspected Cardiac Amyloidosis. The imaging test that will be used in this study is a Positron Emission Tomography Computed Tomography (PET/CT) scan.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: City of Hope - Duarte, Duarte, California
Conditions: Cardiac Amyloidosis
A Study to Evaluate the Efficacy and Safety of MK-1167 in Participants With Alzheimer's Disease Dementia (MK-1167-008)
Recruiting
Researchers want to learn if giving MK-1167 (the study medicine) along with acetylcholinesterase inhibitor (AChEI) therapy can improve symptoms of Alzheimer's disease dementia (AD dementia), such as memory and mental activity. AD dementia is the most common type of dementia. AChEI therapy is the standard treatment for AD dementia.
The goals of this study are to learn:
* If at least one dose level (amount) of MK-1167 works to improve a person's memory and thinking compared to a placebo
* About... Read More
Gender:
ALL
Ages:
Between 55 years and 90 years
Trial Updated:
08/13/2025
Locations: Irvine Clinical Research ( Site 0104), Irvine, California
Conditions: Alzheimer Disease, Dementia
Open-Label Study to Assess Safety and Time to Catheter-related Bloodstream Infections (CRBSI) in Subjects From Birth to < 18 Years of Age
Recruiting
This study is a post-marketing approval requirement to assess the safety and time to Catheter-related Bloodstream Infections (CRBSI) of DefenCath in pediatric population (birth to less than 18 years of age) who are on chronic HD for kidney failure.
Gender:
ALL
Ages:
17 years and below
Trial Updated:
08/13/2025
Locations: Stanford, Palo Alto, California
Conditions: Catheter-Related Infections
Comparison Between ABP 692 and Ocrevus® (Ocrelizumab)
Recruiting
The main objectives of the study are to demonstrate pharmacokinetics (PK) similarity between ABP 692 and Ocrelizumab (US), and ABP 692 and Ocrelizumab (EU), and to demonstrate pharmacodynamics (PD) similarity between ABP 692 and Ocrelizumab reference product (RP) based on assessment of the suppression of new active brain lesions over 24 weeks as assessed by magnetic brain imaging (MRI).
Gender:
ALL
Ages:
Between 18 years and 99 years
Trial Updated:
08/13/2025
Locations: Profound Research - Neurology Center of Southern California, Carlsbad, California
Conditions: Relapsing-remitting Multiple Sclerosis (RRMS)
Alpha Radiation Emitters Device for the Treatment of Pancreatic Cancer Emitters With Chemotherapy for the Treatment of Locally Advanced and Metastatic Pancreatic Cancer
Recruiting
This is a multi-center clinical study enrolling up to 30 participants (15 patients in each cohort). The primary objective of the study is to evaluate the safety of Alpha DaRT in combination with chemotherapy, based on the cumulative incidence rate, severity and outcome of device related AEs. Classification of AEs will be done according to CTCAE V5. The secondary objectives of the study are to:
* Assess efficacy of the Alpha DaRT sources in combination with chemotherapy, determined by overall an... Read More
Gender:
ALL
Ages:
Between 18 years and 120 years
Trial Updated:
08/13/2025
Locations: Cedars-Sinai, Los Angeles, California
541 - 552 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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