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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.
565 - 576 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
A Phase 3, Placebo-controlled, Double-blind Study Assessing Rocatinlimab in Prurigo Nodularis
Recruiting
The main objective of the study will be to evaluate the efficacy of rocatinlimab compared with placebo at week 24 on the patient-reported outcome (PRO) measure of pruritus and overall clinical assessment score (US only).
Gender:
ALL
Ages:
Between 18 years and 100 years
Trial Updated:
08/13/2025
Locations: First OC Dermatology, Fountain Valley, California
Conditions: Prurigo Nodularis
SIMPLAAFY Clinical Trial
Recruiting
The primary objective is to demonstrate the safety and effectiveness of two monotherapy regimens versus dual antiplatelet (DAPT) therapy following post-implant with the WATCHMAN FLX Pro device in a commercial clinical setting.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: Mills Peninsula Health Services, Burlingame, California
Conditions: Atrial Fibrillation, Stroke, Bleeding
Trial of Nadofaragene Firadenovec vs. Observation in Participants With Intermediate Risk Non-Muscle Invasive Bladder Cancer
Recruiting
A phase 3b, Randomized, Controlled Trial of Nadofaragene Firadenovec vs. Observation in Participants with Intermediate Risk Non-Muscle Invasive Bladder Cancer (IR NMIBC)
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: Urology Associates of Central California, Fresno, California
Conditions: Intermediate Risk Non-Muscle Invasive Bladder Cancer
A Study to Evaluate the Efficacy and Safety of Tulisokibart (MK-7240) in Participants With Moderate to Severe Crohn's Disease (MK-7240-008)
Recruiting
The purpose of this protocol is to evaluate the efficacy and safety of tulisokibart in participants with moderately to severely active Crohn's disease. Study 1's primary hypotheses are that at least 1 tulisokibart dose level is superior to placebo in the proportion of participants achieving clinical remission per Crohn's Disease Activity Index score (\<150, US/FDA) or per stool frequency and abdominal pain score (EU/EMA) and in the proportion of participants achieving endoscopic response at Week... Read More
Gender:
ALL
Ages:
Between 16 years and 80 years
Trial Updated:
08/13/2025
Locations: Clinnova Research ( Site 5110), Anaheim, California
Conditions: Crohn's Disease
FPI-2265 (225Ac-PSMA-I&T) for Patients With PSMA-Positive Metastatic Castration-Resistant Prostate Cancer (mCRPC)
Recruiting
This is an open-label, randomized, multicenter study of FPI-2265 (225Ac-PSMA-I\&T). Patient population is adult participants with PSMA positive mCRPC who have had previous treatment with with 177Lu-PSMA-617 or another 177Lu-PSMA radioconjugate (RC). The purpose of the study is to determine the safety and tolerability, and recommended dose and regiment of FPI-2265.
Gender:
MALE
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: City of Hope Comprehensive Cancer Center, Duarte, California
Conditions: Metastatic Castration-resistant Prostate Cancer
A Study Comparing Niraparib With Temozolomide in Adult Participants With Newly-diagnosed, MGMT Unmethylated Glioblastoma
Recruiting
The goal of this Phase 3 clinical trial is to compare the efficacy of niraparib versus temozolomide (TMZ) in adult participants with newly-diagnosed, MGMT unmethylated glioblastoma multiforme (GBM). The main questions it aims to answer are:
Does niraparib improve progression-free survival (PFS) compared to TMZ?
Does niraparib improve overall survival (OS) compared to TMZ?
Participants will be randomly assigned to one of two treatment arms: niraparib or TMZ.
* study drug (Niraparib) or
* comp... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: Scripps Cancer Center, La Jolla, California
Conditions: Glioblastoma, GBM, Brain Neoplasms, Adult, Malignant, Brain Tumor
A Study to Assess the Safety and Efficacy of Oral Armour Thyroid Compared to Synthetic T4 for the Treatment of Primary Hypothyroidism in Adult Participants
Recruiting
This study will evaluate the efficacy and safety of Armour Thyroid treatment compared with synthetic T4 in subjects who have primary hypothyroidism and are currently stabilized (i.e., in-range thyroid-stimulating hormone \[TSH\]) on synthetic T4 treatment. This study will also therefore evaluate the efficacy and safety of dose conversion from synthetic T4 therapy to Armour Thyroid therapy.
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
08/13/2025
Locations: Kaiser San Diego Dept Endocrinology, SCPMG /ID# 262552, Bonita, California
Conditions: Hypothyroidism
A Dose-finding Trial With Lu-AG09222 in Adults With Migraine Who Have Not Been Helped by Prior Preventive Treatments
Recruiting
The purpose of this trial is to determine which doses of Lu AG09222 are recommended to help prevent migraines. People who join this trial have already tried 1 to 4 other available medications to prevent their migraines, but these medications have not helped them.
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
08/13/2025
Locations: Profound Research - Neurology Center of Southern California, Carlsbad, California
Conditions: Migraine
A Study to Compare ABP 234 and Keytruda® (Pembrolizumab) in Participants With Advanced or Metastatic Non-squamous Non-Small Cell Lung Cancer
Recruiting
The primary objective of this study is to compare the efficacy of ABP 234 with the pembrolizumab reference product (Keytruda®).
Gender:
ALL
Ages:
Between 18 years and 99 years
Trial Updated:
08/13/2025
Locations: Precision NextGen Oncology and Research Center, Beverly Hills, California
Conditions: Advanced or Metastatic Non-squamous Non-Small Cell Lung Cancer
Study of Ravulizumab in Immunoglobulin A Nephropathy (IgAN)
Recruiting
The primary objective of this study to evaluate efficacy of ravulizumab compared with placebo on proteinuria reduction and change in eGFR in adult participants with IgAN who are at risk of disease progression.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: Research Site, Los Angeles, California
Conditions: Immunoglobulin A Nephropathy, IgAN
A Study Evaluating FMC-376 in Participants With KRAS G12C Mutated Solid Tumors
Recruiting
The goal of this clinical trial is to evaluate FMC-376 in participants with advanced solid tumors with KRAS G12C mutations. This clinical trial will be conducted in 3 parts: Phase 1A (Dose Escalation), Phase 1B (Dose Expansion), and Phase 2 (Cohort Expansion). Multiple dose levels in participants with advanced solid tumors will be evaluated.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: University of California San Diego (UC San Diego) Health - Jacobs Medical Center - Moores Cancer Center, La Jolla, California
Conditions: Advanced Solid Tumors With KRAS G12C Mutations, Solid Tumor, Adult, Unresectable Solid Tumor, Metastatic Solid Tumor, Non Small Cell Lung Cancer, Colorectal Cancer, KRAS G12C, Pancreatic Cancer
Iberdomide Versus Observation Off Therapy After Idecabtagene Vicleucel CAR-T for Multiple Myeloma
Recruiting
This phase II trial compares iberdomide maintenance therapy to disease monitoring for improving survival in patients who have received idecabtagene vicleucel (a type of chimeric antigen receptor T-cell \[CAR-T\] therapy) for multiple myeloma. The usual approach after treatment with idecabtagene vicleucel is to monitor the multiple myeloma without giving myeloma medications. There is currently no medication approved specifically for use after idecabtagene vicleucel treatment. Upon administration,... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: Cedars Sinai Medical Center, Los Angeles, California
Conditions: Multiple Myeloma
565 - 576 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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