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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.
793 - 804 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
AMBER-HFpEF: Assessment of CK-4021586 in a Multi-Center, Blinded Evaluation of Safety and Tolerability Results in HFpEF
Recruiting
This is a Phase 2 dose-finding study in adult participants with symptomatic HFpEF.
Gender:
ALL
Ages:
Between 40 years and 85 years
Trial Updated:
08/08/2025
Locations: Profound Research LLC, Pasadena, California
Conditions: Symptomatic Heart Failure with Preserved Ejection Fraction (HFpEF)
Testing the Addition of the Immunotherapy Drug, Pembrolizumab, to Radiation Therapy Compared to the Usual Chemotherapy Treatment During Radiation Therapy for Bladder Cancer, PARRC Trial
Recruiting
This phase II trial compares the use of pembrolizumab and radiation therapy to chemotherapy with cisplatin, gemcitabine, 5-fluorouracil or mitomycin-C and radiation therapy for the treatment of non-muscle invasive bladder cancer. Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Chemotherapy drugs, such as cisplatin, gemcitabine, 5-fluorouracil or mitomycin-C,... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/08/2025
Locations: AIS Cancer Center at San Joaquin Community Hospital, Bakersfield, California
Conditions: Non-Muscle Invasive Bladder Urothelial Carcinoma, Recurrent Non-Muscle Invasive Bladder Urothelial Carcinoma, Stage I Bladder Cancer AJCC v8
Neladalkib (NVL-655) for TKI-naive Patients With Advanced ALK-Positive NSCLC
Recruiting
Multicenter, randomized, controlled, open-label, Phase 3 study designed to demonstrate that neladalkib (NVL-655) is superior to alectinib in prolonging progression-free survival (PFS) in patients with treatment-naïve, Anaplastic Lymphoma Kinase (ALK) positive, advanced Non-Small Cell Lung Cancer (NSCLC).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/08/2025
Locations: University of California, Irvine Health, Orange, California
Conditions: Non-small Cell Lung Cancer, Anaplastic Lymphoma Kinase-positive
Testing a Standardized Approach to Surgery and Chemotherapy for Type I Pleuropulmonary Blastoma or the Addition of an Anti-cancer Drug, Topotecan, to the Usual Treatment for Types II and III Pleuropulmonary Blastoma
Recruiting
This phase III trial tests how well surgery plus chemotherapy compared to surgery alone works in treating patients with type I pleuropulmonary blastoma (PPB), and tests how well surgery plus standard chemotherapy with the addition of topotecan works compared to surgery plus standard chemotherapy alone in treating patients with type II and III PPB.
Historically, most children with type I PPB had surgery and approximately 40% of children with type I PPB received chemotherapy following their surge... Read More
Gender:
ALL
Ages:
21 years and below
Trial Updated:
08/08/2025
Locations: Loma Linda University Medical Center, Loma Linda, California
Conditions: Pleuropulmonary Blastoma
Study to Evaluate the Efficacy and Safety of TRL1068 for the Treatment of Prosthetic Joint Infection
Recruiting
TRL1068 is expected to eliminate the pathogen-protecting biofilm in the prosthetic joint and surrounding tissue, thus making pathogens substantially more susceptible to established antibiotic treatment regimens. This Phase 2 study is designed to assess efficacy and safety of TRL1068 in combination with a DAIR (debridement, antibiotics, and implant retention) procedure for chronic prosthetic joint infections of the knee and hip, specifically, eliminating the need for the standard of care 2-stage... Read More
Gender:
ALL
Ages:
Between 18 years and 85 years
Trial Updated:
08/08/2025
Locations: UCLA, Los Angeles, California
Conditions: Prosthetic Joint Infections of Hip, Prosthetic Joint Infections of Knee
Testing the Addition of an Anti-cancer Drug, DT2216, to the Usual Chemotherapy Treatment for Relapsed or Refractory Solid Tumors and Fibrolamellar Carcinoma
Recruiting
This phase I/II trial tests the safety, side effects and best dose of DT2216 in combination with irinotecan and how well it works in treating children, adolescents and young adults with solid tumors and fibrolamellar cancer that has come back after a period of improvement (relapsed) or that has not responded to previous treatment (refractory). DT2216 is an anti-apoptotic protein B-cell lymphoma-extra large targeted protein degrader. It may stop the growth of tumor cells by blocking Bcl-xL, a pro... Read More
Gender:
ALL
Ages:
Between 1 year and 39 years
Trial Updated:
08/08/2025
Locations: Children's Hospital Los Angeles, Los Angeles, California
Conditions: Childhood Fibrolamellar Carcinoma, Recurrent Childhood Fibrolamellar Carcinoma, Recurrent Childhood Malignant Solid Neoplasm, Recurrent Fibrolamellar Carcinoma, Recurrent Malignant Solid Neoplasm, Refractory Childhood Fibrolamellar Carcinoma, Refractory Childhood Malignant Solid Neoplasm, Refractory Fibrolamellar Carcinoma, Refractory Malignant Solid Neoplasm
Study of Oral ABBV-932 to Assess Adverse Events and Change in Disease Activity in Adult Participants With Bipolar I or II Disorder
Recruiting
Bipolar disorder is a severe chronic mood disorder that affects up to 4% of the adult population in the United States. This study will assess how safe and effective ABBV-932 is in treating participants with bipolar I or II disorder.
ABBV-932 is an investigational drug being developed for the treatment of depressive episodes in adult participants with bipolar I or II disorder. Study doctors put participants in 1 of 4 groups, called treatment arms. There is a 1 in 4 chance that a participant will... Read More
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
08/08/2025
Locations: Advanced Research Center /ID# 267716, Anaheim, California
Conditions: Bipolar I Disorder, Bipolar II Disorder
Study to Evaluate Safety, Tolerability and Efficacy of Inclisiran in Children With Homozygous Familial Hypercholesterolemia
Recruiting
This is a pivotal phase III study designed to evaluate safety, tolerability, and efficacy of inclisiran in children (aged 2 to \<12 years) with homozygous familial hypercholesterolemia (HoFH) and elevated low density lipoprotein cholesterol (LDLC).
Gender:
ALL
Ages:
Between 2 years and 11 years
Trial Updated:
08/08/2025
Locations: UC San Francisco Medical Center, San Francisco, California
Conditions: Familial Hypercholesterolemia - Homozygous
Single and Multiple Ascending Dose Study of AMG 513 in Participants With Obesity
Recruiting
The primary objective of this study is to assess the safety and tolerability of AMG 513 after single and multiple doses.
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
08/08/2025
Locations: Anaheim Clinical Trials, Anaheim, California
Conditions: Cardiometabolic Disease
STEP TEENS Weight Maintenance: A Research Study on How Well Semaglutide Helps Teenagers With Excess Body Weight to Lose Weight and Maintain Weight Loss
Recruiting
The study is testing how well semaglutide can help adolescents with excess body weight to lose weight and to maintain weight loss. All participants in the study will receive semaglutide as a weekly injection. The study medicine is injected with a thin needle in the stomach, thighs or upper arms. All participants will get semaglutide treatment for a minimum of 3 years.
Gender:
ALL
Ages:
Between 12 years and 15 years
Trial Updated:
08/08/2025
Locations: Neighborhood Healthcare, Escondido, California
Conditions: Obesity
Study to Evaluate the Effects of NMRA-323511 Among Healthy Elderly and Adults With Agitation Associated With Dementia Due to Alzheimer's Disease
Recruiting
This study consists of 2 parts, Part A and Part B. Part A is a single center, randomized, double-blind, placebo-controlled cohort designed to evaluate the safety, tolerability, and pharmacokinetics (PK) of NMRA-323511 among healthy elderly.
Part B is a multicenter, randomized, double-blinded, placebo-controlled, parallel-group cohort to evaluate the safety, tolerability, and efficacy of NMRA-323511 among adults with Agitation Associated with Dementia due to Alzheimer's Disease.
Part A consists... Read More
Gender:
ALL
Ages:
Between 55 years and 90 years
Trial Updated:
08/08/2025
Locations: Neumora Investigator Site, Costa Mesa, California
Conditions: Alzheimer's Disease, Healthy Elderly
Trial to Evaluate Safety And Effectiveness of Mechanical Circulatory Support in Patients With Advancing Heart Failure
Recruiting
The purpose of TEAM-HF IDE clinical trial is to evaluate safety and effectiveness of the HeartMate 3 LVAS compared to guideline directed medical therapy (GDMT) in a population of ambulatory advanced heart failure patients who are not dependent on intravenous inotrope.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/08/2025
Locations: Sutter Medical Center, Sacramento, California
Conditions: Heart Failure, Heart Diseases, Cardiovascular Diseases, Pulmonary Hypertension
793 - 804 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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