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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.
1957 - 1968 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
AU409 for the Treatment of Advanced Primary Liver Cancers or Solid Tumor With Liver Metastatic Disease
Recruiting
This phase I trial tests the safety, side effects, and best dose of a new intervention, AU409, in treating patients with primary liver cancers that may have spread from where it first started to nearby tissue, lymph nodes, or distant parts of the body (advanced) or advanced solid tumors that have spread to the liver (liver metastatic disease). AU409 may stop cancer from growing and spreading. This trial may help researchers determine if AU409 is safe and effective in treating patients with liver... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/10/2025
Locations: Los Angeles County-USC Medical Center, Los Angeles, California
Conditions: Advanced Cholangiocarcinoma, Advanced Hepatocellular Carcinoma, Advanced Malignant Solid Neoplasm, Metastatic Malignant Neoplasm in the Liver, Refractory Malignant Solid Neoplasm, Stage III Hepatocellular Carcinoma AJCC v8, Stage IV Hepatocellular Carcinoma AJCC v8
Suicide Prevention for Sexual and Gender Minority Youth (Randomized Controlled Trial)
Recruiting
The overarching goal of this study is to evaluate a newly-developed suicide prevention program for sexual and gender minority youth and emerging adults. After development of the intervention program, a randomized controlled trial will be conducted to test its preliminary efficacy in lowering the risk for suicide attempts.
Gender:
ALL
Ages:
Between 15 years and 29 years
Trial Updated:
07/10/2025
Locations: San Diego State University, San Diego, California
Conditions: Suicide
A Study of XMT-2056 in Advanced/Recurrent Solid Tumors That Express HER2
Recruiting
A Study of XMT-2056 in advanced/recurrent solid tumors that express HER2.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/10/2025
Locations: University of South California, Los Angeles, California
Conditions: HER2-positive Breast Cancer, HER2-positive Gastric Cancer, HER2-positive Non-Small Cell Lung Cancer, HER2-positive Colorectal Cancer, HER2-positive Tumors, HER2 Low Breast Cancer
Study of Dato-Dxd as Monotherapy and in Combination With Anti-cancer Agents in Patients With Advanced Solid Tumours (TROPION-PanTumor03)
Recruiting
TROPION-PanTumor03 will investigate the safety, tolerability, and anti-tumour activity of Datopotamab Deruxtecan (Dato-DXd) as Monotherapy and in Combination with Anticancer Agents in Patients with Advanced/Metastatic Solid Tumours.
Gender:
ALL
Ages:
Between 18 years and 130 years
Trial Updated:
07/10/2025
Locations: Research Site, Los Angeles, California
Conditions: Endometrial Cancer, Gastric Cancer, Metastatic Castration-resistant Prostate Cancer, Ovarian Cancer, Colorectal Cancer, Urothelial Cancer, Biliary Tract Cancer
Vascularized Composite Bladder Allograft Transplantation
Recruiting
This phase 0 trial tests the feasibility, functionality, and sustainability of vascularized composite bladder allograft transplantation in treating patients with terminal bladder pathology. A vascularized bladder allograft transplantation may provide a more durable and better-tolerated alternative to standard urinary diversion, which employs bowel. A robotic surgical approach will be employed.
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
07/10/2025
Locations: USC / Norris Comprehensive Cancer Center, Los Angeles, California
Conditions: Neurogenic Bladder, Bladder Dysfunction, Immunosuppression
A Study of Treatment for Medulloblastoma Using Sodium Thiosulfate to Reduce Hearing Loss
Recruiting
This phase III trial tests two hypotheses in patients with low-risk and average-risk medulloblastoma. Medulloblastoma is a type of cancer that occurs in the back of the brain. The term, risk, refers to the chance of the cancer coming back after treatment. Subjects with low-risk medulloblastoma typically have a lower chance of the cancer coming back than subjects with average-risk medulloblastoma. Although treatment for newly diagnosed average-risk and low-risk medulloblastoma is generally effect... Read More
Gender:
ALL
Ages:
Between 4 years and 21 years
Trial Updated:
07/10/2025
Locations: Loma Linda University Medical Center, Loma Linda, California
Conditions: Childhood Medulloblastoma
Sequential Testosterone and Enzalutamide Prevents Unfavorable Progression
Recruiting
Asymptomatic men without pain due to prostate cancer progressing with metastatic CRPC after treatment with combination or sequential ADT + Abi will be treated on a randomized, open label study to determine if sequential treatment with high dose T and Enza will improve primary and secondary objectives vs. continuous Enza as standard therapy.
Gender:
MALE
Ages:
Between 18 years and 90 years
Trial Updated:
07/10/2025
Locations: University of California, San Diego (UCSD), San Diego, California
Conditions: Castration Resistant Metastatic Prostate Cancer
KEYMAKER-U01 Substudy 01A: Efficacy and Safety Study of Pembrolizumab (MK-3475) With or Without Chemotherapy When Used With Investigational Agents in Treatment-naïve Participants With Stage IV Non-small Cell Lung Cancer (NSCLC) (MK-3475-01A/KEYMAKER-U01A)
Recruiting
The purpose of this study is to assess the efficacy and safety of pembrolizumab (MK-3475) with or without chemotherapy in combination with vibostolimab (MK-7684), boserolimab (MK-5890), MK-4830, MK-0482, I-DXd, or HER3-DXd in treatment-naïve participants with advanced squamous or non-squamous NSCLC.
This study is one of the pembrolizumab substudies being conducted under one pembrolizumab umbrella master protocol (MK-3475-U01/KEYMAKER-U01).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/10/2025
Locations: City of Hope ( Site 0014), Duarte, California
Conditions: Carcinoma, Non-Small-Cell Lung
Low-Dose Radiotherapy in Treating Painful Bone Metastases in Patients With Multiple Myeloma
Recruiting
This phase II trial studies how well low-dose radiotherapy works in treating bone pain in patients with multiple myeloma that has spread to the bone. Radiation therapy uses high energy x-rays, gamma rays, neutrons, protons, or other sources to kill tumor cells and shrink tumors. Low-dose radiotherapy may be more convenient for patients and their families, may not interfere as much with the timing of chemotherapy, and may have less chance for short term or long-term side effects from the radiatio... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/10/2025
Locations: City of Hope, Duarte, California
Conditions: Bone Pain, Metastatic Malignant Neoplasm in the Bone, Plasma Cell Myeloma
Virtual Reality in Reducing Pain and Anxiety in Cancer Participants Undergoing Painful Procedures
Recruiting
This trial studies how well virtual reality (VR) works in reducing pain and anxiety in cancer participants undergoing bone marrow biopsy or lumbar puncture. Virtual reality may impact pain and anxiety during and after the procedure.
Gender:
ALL
Ages:
Between 18 years and 70 years
Trial Updated:
07/10/2025
Locations: USC / Norris Comprehensive Cancer Center, Los Angeles, California
Conditions: Malignant Neoplasm
Shaping Tolerance for Delayed Rewards
Recruiting
Deficits in self-control are of major public health relevance as they contribute to several negative outcomes for both individuals and society. For children, developing self-control is a critically important step toward success in academic settings and social relationships, yet there are few non-pharmacological approaches that have been successful in increasing self-control. We found in our earlier studies that self-control can be increased in preschool-aged children with high impulsivity by usi... Read More
Gender:
ALL
Ages:
Between 3 years and 6 years
Trial Updated:
07/10/2025
Locations: UC Davis MIND Institute, Sacramento, California
Conditions: Impulsivity
Virtual Reality Attention Management
Recruiting
Problems with distraction are widespread in the 21st century, but for people with developmental delays or behavioral challenges they can have more damaging effects. For example, susceptibility to distraction is associated with worse school and social performance, lower high school graduation rates, and increased incidence of serious accidents. The investigators' goal is to improve understanding of distractibility and develop a targeted treatment. The proposed intervention is based on models of h... Read More
Gender:
ALL
Ages:
Between 8 years and 12 years
Trial Updated:
07/10/2025
Locations: UC Davis MIND Institute, Sacramento, California
Conditions: ADHD
1957 - 1968 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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