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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.
277 - 288 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
Chronic Cough Research Study
Recruiting
Are you tired of living with chronic cough? Our research study is now looking to enroll people from all backgrounds to help research potential new treatment options for chronic cough.
You are under no obligation to take part and health insurance is not required. Find out more today! We’d love to hear from you!
You are under no obligation to take part and health insurance is not required. Find out more today! We’d love to hear from you!
Conditions:
Chronic Cough
Refractory or Unexplained Chronic Cough
Cough
Asthma
Sinusitis
Featured Offer
Lose Weight with GLP-1 Medications
Recruiting
Policy Lab has partnered with OnlineSemaglutide.org to offer trusted access to semaglutide and other GLP-1 medications, including generic alternatives to Ozempic® and Wegovy®.
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.
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
Chronic Cough Study
Recruiting
Are you tired of living with chronic cough? The ASPIRE Study is now looking to enroll people from all backgrounds to help research potential new treatment options for chronic cough. You are under no obligation to take part and health insurance is not required. Find out more today! We’d love to hear from you.
Conditions:
Chronic Cough
Refractory or Unexplained Chronic Cough
Cough
Asthma
Allergic Asthma
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
EF-41/KEYNOTE D58: Phase 3 Study of Optune Concomitant With Temozolomide Plus Pembrolizumab in Newly Diagnosed Glioblastoma
Recruiting
This is a multicenter, two-arm, randomized, double-blind, placebo-controlled study of Optune® (Tumor Treating Fields at 200 kHz) together with maintenance Temozolomide (TMZ) chemotherapy agent and pembrolizumab compared to Optune® together with maintenance TMZ and placebo in newly diagnosed Glioblastoma (GBM) patients. The primary objective of the study is to evaluate the Overall Survival (OS).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: University of Southern California, Los Angeles, California
Conditions: Glioblastoma
Study of Targeted Therapies for the Treatment of Adult Participants With Moderate to Severe Crohn's Disease
Recruiting
Crohn's disease (CD) is a long-lasting disease that causes severe inflammation (redness, swelling), in the digestive tract, most frequently affecting the bowels. It can cause many different symptoms including belly pain, diarrhea, tiredness, and weight loss. Treatments are available but do not work the same for all patients or may stop working over time. This study will evaluate the effectiveness and adverse events of targeted therapies (TaTs) for adult participants with moderate to severe CD.... Read More
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
08/18/2025
Locations: Southern California Res. Ctr /ID# 265549, Coronado, California
Conditions: Crohn's Disease
A Trial to Evaluate Intravesical Nadofaragene Firadenovec Alone or in Combination With Chemotherapy or Immunotherapy in Participants With High-grade BCG Unresponsive Non-muscle Invasive Bladder Cancer
Recruiting
The pivotal phase 3 trial (rAd-IFN-CS 003) evaluating the efficacy of nadofaragene firadenovec showed that 55 (53.4%) of 103 subjects with CIS ± high-grade Ta/T1 achieved a complete response (CR) at 3 months. In this trial, the safety and efficacy of intravesical instillation of nadofaragene firadenovec alone or in combination with chemotherapy or immunotherapy will be evaluated in participants with NMIBC CIS (± high-grade Ta/T1).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: Urology Associates of Central California, Fresno, California
Conditions: Non-muscle Invasive Bladder Cancer With Carcinoma in Situ
A Study of JNJ-64042056 in Participants With Preclinical Alzheimer's Disease
Recruiting
The purpose of this study is to assess the effect of JNJ-64042056 on cognitive decline, as measured by Preclinical Alzheimer's disease Cognitive Composite 5 (PACC-5) compared with placebo.
Gender:
ALL
Ages:
Between 55 years and 75 years
Trial Updated:
08/18/2025
Locations: Irvine Clinical Research, Irvine, California
Conditions: Preclinical Alzheimer's Disease
Phase 3 Study of T-DXd and Rilvegostomig Versus SoC in Advanced HER2-expressing Biliary Tract Cancer
Recruiting
The purpose of this study is to measure the efficacy and safety of T-DXd with rilvegostomig or T-DXd monotherapy compared with gemcitabine plus cisplatin and durvalumab in patients with advanced treatment naïve HER2-expressing BTC.
Gender:
ALL
Ages:
Between 18 years and 99 years
Trial Updated:
08/18/2025
Locations: Research Site, Fullerton, California
Conditions: Biliary Tract Cancer
DECIDE: A Comparative Effectiveness Trial of Metformin Versus Insulin for the Treatment of Gestational Diabetes
Recruiting
This is a non-inferiority patient-centered and pragmatic comparative-effectiveness pregnancy randomized controlled trial (RCT) with postpartum maternal and child follow-up through 2 years of 1,572 individuals with gestational diabetes mellitus (GDM) randomized to oral metformin versus injectable insulin.
This study will determine if metformin is not inferior to insulin in reducing adverse pregnancy outcomes, is comparably safe for exposed individuals and children, and if patient-reported factor... Read More
Gender:
FEMALE
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: Cedars Sinai Medical Center, Los Angeles, California
Conditions: Gestational Diabetes Mellitus, Pregnancy, High Risk
Transmural Healing and Disease-Modifying Effect of Guselkumab in Crohn's Disease Patients
Recruiting
The purpose of this study is to evaluate the efficacy of guselkumab in healing of all layers of the digestive tract (transmural healing) with the help of a score called Magnetic Resonance Index of Activity (MaRIA) based on a scan at Week 48.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: Center for Colitis and Crohns Disease University of California, San Francisco, California
Conditions: Crohn's Disease
Optimizing the Diagnostic Approach to Cephalosporin Allergy Testing
Recruiting
Cephalosporin antibiotics are commonly used but can result in allergic reactions and anaphylaxis. There is no clear diagnostic approach for cephalosporin-allergic patients, and guidance for the use of other antibiotics in allergic patients is based on side chain chemical similarity and limited skin testing evidence. This project includes a clinical trial and mechanistic studies to optimize the approach to cephalosporin allergy and advance future diagnostics.
Gender:
ALL
Ages:
Between 18 years and 70 years
Trial Updated:
08/18/2025
Locations: University of California, San Francisco, San Francisco, California
Conditions: Drug Allergy, Cephalosporin Allergy, Drug Hypersensitivity, Antibiotic Allergy, Beta Lactam Adverse Reaction, Drug-Induced Anaphylaxis, Cephalosporin Reaction
A Study to Test the Efficacy and Safety of Riliprubart Against the Usual Treatment of Intravenous Immunoglobulin (IVIg) in People With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)
Recruiting
The purpose of the study is to evaluate efficacy of riliprubart compared to IVIg in adult participants with CIDP who are receiving maintenance treatment with IVIg. The study duration will be for a maximum of 109 weeks including screening, treatment phases, and follow-up.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: Keck School of Medicine of University of Southern California- Site Number : 8400002, Los Angeles, California
Conditions: Chronic Inflammatory Demyelinating Polyneuropathy
A Study Evaluating Efruxifermin in Subjects With Non-Cirrhotic Nonalcoholic Steatohepatitis (NASH)/Metabolic Dysfunction-Associated Steatohepatitis (MASH) and Fibrosis
Recruiting
This is a multi-center evaluation of efruxifermin (EFX) in a randomized, double-blind, placebo-controlled study in subjects with non-cirrhotic NASH/MASH and fibrosis stage 2 or 3 (F2 or F3).
The study will enroll subjects in two cohorts for a total samples size of 1650 subjects.
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
08/18/2025
Locations: Akero Clinical Study Site, Chula Vista, California
Conditions: NASH With Fibrosis, MASH With Fibrosis
A First-in-Human (FIH) Study to Evaluate the Safety and Tolerability of VVD-130850 in Participants With Advanced Solid and Hematologic Tumors
Recruiting
A FIH study to evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of VVD-130850, as single agent and in combination with checkpoint inhibition, in participants with advanced solid and hematologic tumors.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: California Research Institute, Los Angeles, California
Conditions: Advanced Solid Tumors, Advanced Hematologic Tumors
A Study to Evaluate INCB161734 in Participants With Advanced or Metastatic Solid Tumors With KRAS G12D Mutation
Recruiting
This study is conducted to determine the safety and tolerability of INCB161734 as a single agent or in combination with other anticancer therapies.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: Stanford University, Palo Alto, California
Conditions: Solid Tumors, Pancreatic Ductal Adenocarcinoma (PDAC), Colorectal Cancer (CRC), Non-Small Cell Lung Cancer (NSCLC)
277 - 288 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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