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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.
253 - 264 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
Substudy 03C: A Study of Combination Therapies in Participants With Renal Cell Carcinoma With Recurrent Disease During or After Anti-PD-(L)1 Therapy (MK-3475-03C/KEYMAKER-U03)
Recruiting
Substudy 03C is part of a larger research study that is testing experimental treatments for renal cell carcinoma (RCC). The larger study is the umbrella study (U03).
The goal of substudy 03C is to evaluate the safety and efficacy of experimental combinations of investigational agents in participants with clear cell renal cell carcinoma (ccRCC) who have recurrent disease during or after anti-programmed cell death 1/programmed cell death ligand 1 (PD-\[L\]1) adjuvant therapy.
This substudy will... Read More
Gender:
ALL
Ages:
Between 18 years and 120 years
Trial Updated:
08/18/2025
Locations: UCSF Medical Center at Mission Bay ( Site 5008), San Francisco, California
Conditions: Renal Cell Carcinoma
Prospective Study to Assess a Diagnostic Aid for Cancer
Recruiting
The primary objective of this study is to evaluate the performance of a blood-based diagnostic aid test for cancer detection in individuals presenting with symptoms, signs, or findings that raise clinical suspicion for cancer.
Gender:
ALL
Ages:
45 years and above
Trial Updated:
08/18/2025
Locations: Palomar Health, Poway, California
Conditions: Cancer
A Study of Long-acting Antibodies Alone and in Combinations for Moderate to Severe Ulcerative Colitis
Recruiting
This is a Phase 2, multicenter, proof-of-concept platform study in adult participants with moderately to severely active ulcerative colitis (UC). The primary goal of the study is to assess the efficacy and safety of multiple interventions following intravenous (IV) induction and subcutaneous (SC) maintenance treatment.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: Site 012, Lancaster, California
A Long-Term Safety and Efficacy Study of Verekitug (UPB-101) in Adult Participants With Severe Asthma (VALOUR)
Recruiting
The primary purpose of this study is to evaluate the long-term safety and efficacy of verekitug (UPB-101) in participants who complete the VALIANT study (NCT06196879).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: California Medical Research Associates Inc., Northridge, California
Conditions: Severe Asthma
A Study of Mezagitamab in Adults With Primary IgA Nephropathy Kidney Condition
Recruiting
Immunoglobulin A nephropathy (IgAN) is a kidney condition. It happens when the body's immune system creates groups of proteins (called immune complexes) that build-up in the kidneys causing swelling (inflammation). Over time, this inflammation may lead to kidney damage and cause the kidneys to no longer work properly. The main aim of this study is to check how well mezagitamab changes protein levels in the urine (proteinuria) compared to placebo in adults with primary IgAN. A placebo looks like... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: Academic Medical Research Institute, Los Angeles, California
Conditions: Kidney Disease
Motiva Implants® Post-Approval Study
Recruiting
This study examines the general post-market use and safety of Motiva Implants® and gathers and assesses selected safety and effectiveness data about their post market performance and experience.
Gender:
FEMALE
Ages:
22 years and above
Trial Updated:
08/18/2025
Locations: Schwartz Aesthetic Institute, Westlake Village, California
Conditions: Breast Implant
Efficacy of Fusidic Acid 1% in the Treatment of Bacterial Conjunctivitis
Recruiting
The purpose of this clinical trial is to demonstrate the superiority of fusidic acid 1% over placebo in adults and children with confirmed bacterial conjunctivitis and to further establish the safety profile of fusidic acid 1% for topical ocular administration.
Gender:
ALL
Ages:
All
Trial Updated:
08/18/2025
Locations: Baxis Site 24, Huntington Beach, California
Conditions: Bacterial Conjunctivitis
Study of Bitopertin in Participants With EPP or XLP (APOLLO)
Recruiting
The goal of this clinical trial is to learn if bitopertin works and is safe to treat EPP or XLP in participants 12 years or older. The main questions it aims to answer are:
* Whether bitopertin increases pain-free sunlight exposure after 6 months of treatment in participants with EPP or XLP.
* How PPIX concentration levels change from before bitopertin treatment to after 6 months of treatment.
Researchers will compare bitopertin to a placebo look-alike substance that contains no drug.
Partici... Read More
Gender:
ALL
Ages:
12 years and above
Trial Updated:
08/18/2025
Locations: Marvel Clinical Research, Huntington Beach, California
Conditions: Erythropoietic Protoporphyria (EPP), X-Linked Protoporphyria (XLP)
Fluid Management of Acute Decompensated Heart Failure Subjects Treated With Reprieve System (FASTR-II) (IDE-G210258)
Recruiting
The objective of this study is to prospectively compare decongestive therapy administered by the Reprieve System to Optimal Diuretic Therapy (ODT) in the treatment of patients diagnosed with acute decompensated heart failure (ADHF). The main objective is to determine if the Reprieve System can more efficiently decongest ADHF patients in comparison to Control Therapy.
Gender:
ALL
Ages:
22 years and above
Trial Updated:
08/18/2025
Locations: University of California Irvine, Irvine, California
Conditions: Acute Decompensated Heart Failure
VY7523-102: Randomized, Placebo-Controlled, Double-Blind, Multiple Ascending Dose Study in Participants With Early Alzheimer's Disease
Recruiting
This study is to be conducted in participants with early Alzheimer's Disease to test VY7523, a new drug being researched for treatment of Alzheimer's Disease. This study will look at how safe the drug is and how it works in the brain. It was first tested in normal, healthy participants who volunteered to participate. The study will look at three different dose levels, starting with the lowest dose first and moving to higher doses and more participants after safety has been reviewed by doctors an... Read More
Gender:
ALL
Ages:
Between 50 years and 90 years
Trial Updated:
08/18/2025
Locations: VYGR Site 840018, Los Angeles, California
Conditions: Alzheimer's Disease (AD)
A Study to Evaluate INCB186748 in Participants With Advanced or Metastatic Solid Tumors With KRAS G12D Mutation
Recruiting
The purpose of this study is to evaluate INCB186748 in Participants With Advanced or Metastatic Solid Tumors With KRAS G12D Mutation.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: UCLA Healthcare Hematology-Oncology, Santa Monica, California
Conditions: Solid Tumors, Pancreatic Ductal Adenocarcinoma (PDAC), Colorectal Cancer (CRC)
FORTIFI-HN01: A Study of Ficerafusp Alfa (BCA101) or Placebo in Combination With Pembrolizumab in First-Line PD-L1-pos, R or M HNSCC
Recruiting
Ficerafusp alfa is directed against two targets, Epidermal Growth Factor Receptor (EGFR) and Transforming Growth Factor beta (TGF-β).
This study intends to evaluate the safety and efficacy of ficerafusp alfa in combination with pembrolizumab versus placebo with pembrolizumab in 1L PD-L1-positive, recurrent or metastatic Head and Neck Squamous Cell Carcinoma (HNSCC).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/18/2025
Locations: Site #0107, La Jolla, California
Conditions: Metastatic Head and Neck Squamous Cell Carcinoma, Recurrent Head and Neck Squamous Cell Carcinoma
253 - 264 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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