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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.
1333 - 1344 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
Long-Term Study to Assess the Safety and Tolerability of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)
Recruiting
This study will evaluate the long-term safety and tolerability of NBI-1065845 as an adjunctive treatment in participants with MDD.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/29/2025
Locations: Neurocrine Clinical Site, Orange, California
Conditions: Major Depressive Disorder
NBI-1117568-SCZ3029: Evaluation of NBI-1117568 in Inpatient Adults With Schizophrenia
Recruiting
The primary objective for this study is to evaluate the efficacy of NBI-1117568 compared with placebo on improving behavioral and psychological symptoms of schizophrenia in adults.
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
07/29/2025
Locations: Neurocrine Clinical Site, Anaheim, California
Conditions: Schizophrenia
A Study of Efimosfermin Alfa in Participants With Biopsy-confirmed Cirrhosis (Compensated) MASH
Recruiting
The purpose of this study is to evaluate the safety, tolerability, preliminary efficacy, and pharmacokinetics (PK) of efimosfermin in participants with metabolic dysfunction associated steatohepatitis (MASH) and compensated cirrhosis consistent with stage F4 fibrosis.
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
07/29/2025
Locations: Fresno Clinical Research Center, Fresno, California
Conditions: Metabolic Dysfunction-Associated Steatohepatitis
A Trial Evaluating BJT-778 vs Delayed Treatment for the Treatment of Chronic Hepatitis Delta Infection
Recruiting
This is a Phase 2b/3 study designed to evaluate the safety and efficacy of chronic treatment with brelovitug (a.k.a BJT-778; BTG) for chronic hepatitis delta virus (HDV) infection. The comparator in this study will be 24-weeks of delayed treatment. During the 24-weeks of delayed treatment, participants will complete the same visits and assessments as those randomized to initiate brelovitug immediately. At the completion of 24-week delayed treatment period, all participants will start treatment w... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/29/2025
Locations: Garden Grove, Garden Grove, California
Conditions: Chronic Hepatitis D Infection
Tranexamic Acid for Second Trimester Dilation and Evacuation and Bleeding Outcomes
Recruiting
Although procedural abortion in the second trimester is extremely safe, hemorrhage is one of the leading causes of morbidity and mortality. Tranexamic acid (TXA) is used commonly in obstetrics to prevent or manage intrapartum or postpartum hemorrhage and has been associated with decreased mortality and decreased blood loss at the time of birth. Some guidelines are recommending the use of TXA for both the prevention and management of bleeding for abortion care. However, there are currently no pub... Read More
Gender:
FEMALE
Ages:
18 years and above
Trial Updated:
07/29/2025
Locations: University of California San Diego, San Diego, California
Conditions: Abortion, Dilation and Evacuation, Hemorrhage, Prophylactic Tranexamic Acid Use, Blood Loss
A Study of CLSP-1025 in Adult Patients With Solid Tumors That Harbor the p53 R175H Mutation
Recruiting
Phase 1 dose escalation and expansion study of CLSP-1025, a first-in-class HLA-A\*02:01 specific T cell engager (TCE) targeting solid tumors that harbor the p53 R175H mutation.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/29/2025
Locations: USC - Norris Comprehensive Cancer Center, Los Angeles, California
Conditions: Advanced Solid Tumor, Unresectable Solid Tumor, Metastatic Solid Tumor, Colorectal Adenocarcinoma, Pancreatic Adenocarcinoma, Lung Cancer, Ovarian Cancer, Breast Cancer, Head and Neck Squamous Cell Carcinoma, Prostate Cancer, Bladder Cancer
A Study of an FGFR2/3 Inhibitor (CGT4859) in Patients With Cholangiocarcinoma and Other Advanced Solid Tumors
Recruiting
This is an open-label, phase 1/2 study evaluating the safety, tolerability, pharmacokinetic (what the body does to the drug), pharmacodynamic (what the drug does to the body), and antitumor activity of CGT4859 in adult participants with intrahepatic cholangiocarcinoma (iCCA) or other advanced solid tumors with FGFR2 and/or FGFR3 genetic alternations.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/29/2025
Locations: Stanford Cancer Institute, Palo Alto, California
Conditions: Intrahepatic Cholangiocarcinoma (Icc), Cholangiocarcinoma, Other Solid Tumors, Adult, FGFR2 Gene Fusion/Rearrangement, FGFR2 Gene Amplification, FGFR2 Gene Short Variants, FGFR3 Gene Fusion/Rearrangement, FGFR3 Gene Amplification, FGFR3 Gene Short Variants, FGFR2 Genetic Alterations, FGFR3 Genetic Alterations, Advanced Solid Tumors
Study of Quemliclustat and Chemotherapy Versus Placebo and Chemotherapy in Patients With Metastatic Pancreatic Ductal Adenocarcinoma
Recruiting
The purpose of this study is to compare overall survival of quemliclustat, nab-paclitaxel and gemcitabine versus placebo, nab-paclitaxel and gemcitabine in all randomized patients.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/29/2025
Locations: University of California San Diego Health, La Jolla, California
Conditions: Metastatic Pancreatic Ductal Adenocarcinoma
To Evaluate the Efficacy of CVN424 in Parkinson's Disease Participants With Motor Complications
Recruiting
This is a randomized, double-blind, placebo-controlled, multicenter study in participants with Parkinson's disease (PD) with motor fluctuations. Participants will be randomized to receive once-daily oral doses of either 75 milligrams (mg) CVN424 or 150 mg CVN424, or a matching placebo for 12 weeks. Participants who successfully complete this study and retain eligibility/suitability will be invited to participate in a future open-label extension (OLE) study.
Gender:
ALL
Ages:
30 years and above
Trial Updated:
07/29/2025
Locations: Parkinson's Research Centers of America - Palo Alto, Palo Alto, California
Conditions: Parkinson Disease
Registry for Stage 2 Type 1 Diabetes
Recruiting
Stage 2 Type 1 Diabates (T1D) is an early stage of T1D characterized by dysglycemia but not yet leading to clinical symptoms. Progression of the disease to Stage 3 (clinical T1D), leads to overt hyperglycemia requiring eventually exogenous insulin.
TZIELD® (teplizumab-mzwv) has been approved to delay onset of stage 3 T1D, by the United States (US) Food and Drug Administration (FDA) for adults and children aged 8 years and older with Stage 2 T1D.
The purpose of this study is to collect general... Read More
Gender:
ALL
Ages:
All
Trial Updated:
07/29/2025
Locations: University of California San Francisco - Mission Bay- Site Number : 8400005, San Francisco, California
Conditions: Type 1 Diabetes
A Study to Evaluate the Safety, Tolerability, and Efficacy of Escalating Doses of BMS-986463 in Participants With Select Advanced Malignant Tumors.
Recruiting
The purpose of this study is to evaluate the safety, tolerability, and efficacy of escalating doses of BMS-986463 in participants with select advanced malignant tumors.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/29/2025
Locations: USC/Norris Comprehensive Cancer Center, Los Angeles, California
Conditions: High-grade Serous Ovarian Carcinoma (HGSOC), Uterine Serous Carcinoma (USC), Non-small Cell Lung Cancer (NSCLC)
A Phase 3 Study of Barzolvolimab in Participants With Chronic Spontaneous Urticaria (CSU)
Recruiting
The purpose of this study is to establish the efficacy, safety and tolerability of barzolvolimab in adult participants with Chronic Spontaneous Urticaria (CSU) inadequately controlled by non-sedating second generation H1-antihistamines in comparison to placebo.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/29/2025
Locations: Kern Research, Inc., Bakersfield, California
Conditions: Chronic Spontaneous Urticaria
1333 - 1344 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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