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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.
2317 - 2328 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
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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Lose 20% of Body Weight With GLP-1's
Recruiting
Policy Lab has partnered with OnlineSemaglutide.org to offer trusted access to tirzepatide and other GLP-1 medications, including generic alternatives to Ozempic® and Wegovy®.
Semaglutide and Tirzepatide are advanced GLP-1 medications designed to support weight management and metabolic health. They work by targeting GLP-1 receptors in the body, helping regulate appetite, improve blood sugar control, and support sustainable weight loss (up to 22% of body weight).
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Semaglutide and Tirzepatide are advanced GLP-1 medications designed to support weight management and metabolic health. They work by targeting GLP-1 receptors in the body, helping regulate appetite, improve blood sugar control, and support sustainable weight loss (up to 22% of body weight).
Get $50 off your first order using promo 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
Featured Trial
Stroke Clinical Study
Recruiting
A clinical study for people that suffer with Stroke
Conditions:
Stroke
Pragmatic Evaluation of Events And Benefits of Lipid-lowering in Older Adults
Recruiting
PREVENTABLE is a multi-center, randomized, parallel group, placebo-controlled superiority study. Participants will be randomized 1:1 to atorvastatin 40 mg or placebo. This large study conducted in community-dwelling older adults without cardiovascular disease (CVD) or dementia will demonstrate the benefit of statins for reducing the primary composite of death, dementia, and persistent disability and secondary composites including mild cognitive impairment (MCI) and cardiovascular events.
Gender:
ALL
Ages:
75 years and above
Trial Updated:
06/23/2025
Locations: Fresno VA Medical Center, Fresno, California
Molecular Genetics Studies of Cancer Patients and Their Relatives
Recruiting
This trial studies the genetic and behavioral factors that may contribute to the development of specific cancers and how these factors may affect the outcome of the disease in patients with a history of cancer and their relatives.
Gender:
ALL
Ages:
All
Trial Updated:
06/23/2025
Locations: John Muir Medical Center-Concord Campus, Concord, California
Conditions: Malignant Neoplasm
Anticoagulation in ICH Survivors for Stroke Prevention and Recovery
Recruiting
Primary Aim: To determine if apixaban is superior to aspirin for prevention of the composite outcome of any stroke (hemorrhagic or ischemic) or death from any cause in patients with recent ICH and atrial fibrillation (AF).
Secondary Aim: To determine if apixaban, compared with aspirin, results in better functional outcomes as measured by the modified Rankin Scale.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/23/2025
Locations: Mercy San Juan Medical Center, Carmichael, California
Conditions: Intracerebral Hemorrhage, Atrial Fibrillation
First-in-Human, Phase I, Open-label, Multicenter, Dose Escalation Clinical Study
Recruiting
First-in-Human, Phase I, open-label, multicenter, dose-escalation study to evaluate the safety, tolerability, PK, pharmacodynamics, and preliminary antitumor activity of FL115 in patients with advanced solid tumors who have progressed or are intolerant to current standard-of-care therapies, including immune check-point inhibitors administered in single-agent or combination use.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/22/2025
Locations: HOAG Memorial Hospital Presbyterian, Newport Beach, California
Conditions: Locally Advanced/Metastatic Solid Tumors
A Study to Assess Safety and Tolerability of PCRX-201 in Subjects With Painful Osteoarthritis of the Knee
Recruiting
The goal of this clinical trial is to learn if a single knee injection of different doses (Dose A and Dose B) of an investigation product PCRX-201, following steroid pretreatment, is safe and tolerable in male of female patients 45 to 80 years old with osteoarthritis of the knee. It will also learn how the body reacts to the PCRX-201 injection and how effective the treatment is.
Researchers will compare Dose A and Dose B of PCRX-201 versus placebo from Week 1 through Week 52 to assess adverse e... Read More
Gender:
ALL
Ages:
Between 45 years and 80 years
Trial Updated:
06/21/2025
Locations: Osteoporosis Medical Center, Beverly Hills, California
Conditions: Osteoarthritis (OA) of the Knee
Repurposing Riluzole for Cancer-Related Cognitive Impairment: A Pilot Trial
Recruiting
This is a phase 2a, randomized, double-blinded, placebo-controlled pilot clinical trial determining the impact of riluzole therapy on circulating brain derived neuropathic factor (BDNF) levels of cancer survivors with cancer related cognitive impairment.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/21/2025
Locations: Chao Family Comprehensive Cancer Center, University of California Irvine, Orange, California
Conditions: Breast Cancer, Sarcoma, Gastric Cancer, Lung Cancer, Head and Neck Cancer, Colorectal Cancer, Ovarian Cancer, Liver Cancer, Genitourinary Cancer, Gynecologic Cancer
Feasibility of an In-home Standing and Walking Intervention for Infants With and at High Risk of Cerebral Palsy
Recruiting
The purpose of this study is to evaluate the feasibility and begin to evaluate the effect of an intensive in-home standing and walking intervention for infants with or at high risk of cerebral palsy.
Gender:
ALL
Ages:
Between 5 months and 2 years
Trial Updated:
06/21/2025
Locations: University of Southern California, Los Angeles, California
Conditions: Cerebral Palsy
A Multicenter Study in Bronchoscopy Combining Stimulated Raman Histology With Artificial Intelligence for Rapid Lung Cancer Detection - The ON-SITE Study
Recruiting
The ON-SITE study represents a prospective, observational study focused on the training/tuning and pivotal validation of deep learning algorithms that detect cell/tissue morphology suspicious for cancer in biopsies of peripheral lung nodules/masses and mediastinal/hilar lymph nodes imaged with the NIO Laser Imaging System in the procedure room without requiring traditional sample processing.
The study includes four arms based on biopsy location and biopsy modality/tool:
1. Transbronchial force... Read More
Gender:
ALL
Ages:
22 years and above
Trial Updated:
06/20/2025
Locations: UC San Diego, San Diego, California
Conditions: Lung Biopsy
Extended-release Sodium Oxybate in Children
Recruiting
The main objectives of this study are to determine the treatment preferences of children with narcolepsy type 1 between Extended-release sodium oxybate and Non-extended-release oxybates (Sodium oxybate or a medication with the combination of Calcium, magnesium, potassium, and sodium oxybates). The study will also assess the safety, convenience, and tolerability of Extended-release sodium oxybate. Additionally, the researchers aim to assess how well Extended-release sodium oxybate works in treati... Read More
Gender:
ALL
Ages:
Between 7 years and 17 years
Trial Updated:
06/20/2025
Locations: Stanford University, Redwood City, California
Conditions: Narcolepsy Type 1 (NT 1)
Consolidation of First-Line MRD+ Remission With Cema-cel in Patients With LBCL
Recruiting
This is a randomized, open-label study in adult patients who have completed standard first line therapy for large B-cell lymphoma (LBCL) and achieved a complete response or partial response suitable for observation, but who have minimal residual disease (MRD) as detected by the Foresight CLARITY™ Investigational Use Only (IUO) MRD test, powered by PhasED-Seq™. The purpose of the trial is to assess the efficacy and safety of consolidation with cemacabtagene ansegedleucel (cema-cel), an allogeneic... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/20/2025
Locations: Alta Bates Summit Medical Center, Berkeley, California
Conditions: Large B-cell Lymphoma
Evaluating a Lifestyle Intervention to Prevent Recurrence of Diabetic Foot Ulcers
Recruiting
People with diabetes often experience foot ulcers, which can harm their ability to move, lower their quality of life, and increase the chances of losing a limb. These diabetic foot ulcers (DFUs) commonly come back (recur) even after they've healed, so it's crucial to stop them from returning to avoid toe, foot , or leg amputation. While wearing special shoes to reduce pressure on the feet is essential for healing and preventing DFUs, many people struggle to follow this treatment plan once their... Read More
Gender:
ALL
Ages:
21 years and above
Trial Updated:
06/20/2025
Locations: Rancho Los Amigos National Rehabilitation Center, Downey, California
Conditions: Diabetic Foot, Diabetic Foot Ulcer, Foot Ulcer, Diabetic, Foot Wound
Creatine Supplementation in Concussion Recovery
Recruiting
The proposed study aims to compare concussion recovery in those supplementing creatine and those not supplementing creatine. Specific aim 1: To compare number of days until asymptomatic between those taking creatine vs. those not taking creatine following a concussion. Hypothesis: The investigators hypothesize that individuals taking creatine will become asymptomatic sooner than those not taking creatine.Specific aim 2: To compare typical concussion assessment scores (i.e., symptom score, mental... Read More
Gender:
ALL
Ages:
Between 18 years and 35 years
Trial Updated:
06/20/2025
Locations: San Diego State University, San Diego, California
Conditions: Concussion, Brain
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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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