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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.
325 - 336 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
APOLLO: A Randomized Phase II Double-Blind Study of Olaparib Versus Placebo Following Curative Intent Therapy in Patients With Resected Pancreatic Cancer and a Pathogenic BRCA1, BRCA2 or PALB2 Mutation
Recruiting
This phase II trial investigates how well the addition of olaparib following completion of surgery and chemotherapy works in treating patients with pancreatic cancer that has been surgically removed (resected) and has a pathogenic mutation in BRCA1, BRCA2, or PALB2. Olaparib is an inhibitor of PARP, an enzyme that helps repair deoxyribonucleic acid (DNA) when it becomes damaged. Blocking PARP may help keep tumor cells from repairing their damaged DNA, causing them to die. PARP inhibitors are a t... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/16/2025
Locations: Mission Hope Medical Oncology - Arroyo Grande, Arroyo Grande, California
Conditions: Pancreatic Acinar Cell Carcinoma, Pancreatic Adenosquamous Carcinoma, Pancreatic Squamous Cell Carcinoma, Resectable Pancreatic Acinar Cell Carcinoma, Resectable Pancreatic Adenocarcinoma, Resectable Pancreatic Adenosquamous Carcinoma, Resectable Pancreatic Carcinoma
Testing Lutetium Lu 177 Dotatate in Patients With Somatostatin Receptor Positive Advanced Bronchial Neuroendocrine Tumors
Recruiting
This phase II trial studies the effect of lutetium Lu 177 dotatate compared to the usual treatment (everolimus) in treating patients with somatostatin receptor positive bronchial neuroendocrine tumors that have spread to other places in the body (advanced). Lutetium Lu 177-dotate is a radioactive drug. It binds to a protein called somatostatin receptor, which is found on some neuroendocrine tumor cells. Lutetium Lu 177-dotatate builds up in these cells and gives off radiation that may kill them.... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/16/2025
Locations: Tower Cancer Research Foundation, Beverly Hills, California
Conditions: Locally Advanced Lung Neuroendocrine Neoplasm, Lung Neuroendocrine Neoplasm, Metastatic Lung Neuroendocrine Neoplasm, Recurrent Lung Neuroendocrine Neoplasm, Unresectable Lung Neuroendocrine Neoplasm, Advanced Lung Neuroendocrine Tumor, Functioning Lung Neuroendocrine Tumor, Lung Neuroendocrine Tumor G1, Lung Neuroendocrine Tumor G2, Metastatic Lung Neuroendocrine Tumor, Non-Functioning Lung Neuroendocrine Tumor, Unresectable Lung Neuroendocrine Tumor
Transcranial Magnetic Stimulation for Restricted and Repetitive Behavior in ASD
Recruiting
Investigating the efficacy of a form of TMS called theta-burst stimulation for restricted and repetitive behavior in ASD.
Gender:
ALL
Ages:
Between 12 years and 45 years
Trial Updated:
08/16/2025
Locations: Stanford University, Stanford, California
Testing the Effectiveness of Two Immunotherapy Drugs (Nivolumab and Ipilimumab) With One Anti-cancer Targeted Drug (Cabozantinib) for Rare Genitourinary Tumors
Recruiting
This phase II trial studies how well cabozantinib works in combination with nivolumab and ipilimumab in treating patients with rare genitourinary (GU) tumors that has spread from where it first started (primary site) to other places in the body. Cabozantinib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Immunotherapy with monoclonal antibodies, such as nivolumab and ipilimumab, may help the body's immune system attack the cancer, and may interfere wit... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/16/2025
Locations: Mission Hope Medical Oncology - Arroyo Grande, Arroyo Grande, California
Conditions: Bladder Adenocarcinoma, Bladder Mixed Adenocarcinoma, Bladder Squamous Cell Carcinoma, Chromophobe Renal Cell Carcinoma, Kidney Medullary Carcinoma, Large Cell Neuroendocrine Carcinoma, Metastatic Bladder Carcinoma, Metastatic Bladder Large Cell Neuroendocrine Carcinoma, Metastatic Bladder Squamous Cell Carcinoma, Metastatic Kidney Medullary Carcinoma, Metastatic Malignant Genitourinary System Neoplasm, Metastatic Penile Carcinoma, Metastatic Sarcomatoid Renal Cell Carcinoma, Papillary Renal Cell Carcinoma, Sarcomatoid Renal Cell Carcinoma, Stage IV Bladder Cancer AJCC v8, Stage IV Penile Cancer AJCC v8, Stage IV Renal Cell Cancer AJCC v8, Stage IVB Prostate Cancer AJCC v8, Bladder Clear Cell Adenocarcinoma, Bladder Neuroendocrine Carcinoma, Collecting Duct Carcinoma, Metastatic Urethral Carcinoma, Stage IV Urethral Cancer AJCC v8, Urethral Clear Cell Adenocarcinoma, Bladder Small Cell Neuroendocrine Carcinoma, Metastatic Bladder Small Cell Neuroendocrine Carcinoma, Metastatic Prostate Small Cell Neuroendocrine Carcinoma, Invasive Bladder Giant Cell Urothelial Carcinoma, Invasive Bladder Lymphoepithelioma-Like Carcinoma, Invasive Bladder Nested Urothelial Carcinoma, Invasive Bladder Plasmacytoid Urothelial Carcinoma, Invasive Bladder Sarcomatoid Urothelial Carcinoma, Invasive Bladder Urothelial Carcinoma, Metastatic Bladder Clear Cell (Glycogen-Rich) Urothelial Carcinoma, Metastatic Bladder Lipid-Rich Urothelial Carcinoma, Metastatic Bladder Micropapillary Urothelial Carcinoma, Metastatic Bladder Plasmacytoid Urothelial Carcinoma, Metastatic Bladder Sarcomatoid Urothelial Carcinoma, Urachal Adenocarcinoma, Malignant Testicular Leydig Cell Tumor, Malignant Testicular Sertoli Cell Tumor, Metastatic Bladder Giant Cell Urothelial Carcinoma, Metastatic Chromophobe Renal Cell Carcinoma, Metastatic Papillary Renal Cell Carcinoma
WALNUTS for POWER: Polyphenols, Omega-3 Fatty Acids, Weight Loss, and EneRgy
Recruiting
This is a randomized control trial testing the effect of walnut supplementation on prostate cancer progression in 50 men with biopsy confirmed prostate cancer and planning to undergo RP. Patients consented to the study will be randomly assigned to either continue their usual diets (control arm) or to the walnut arm for 4-10 weeks depending on the window between their consent date and the date for RP.
Gender:
MALE
Ages:
18 years and above
Trial Updated:
08/16/2025
Locations: Cedars-Sinai Medical Center, Los Angeles, California
Conditions: Prostate Cancer
A Phase II/III Trial of Nivolumab, Ipilimumab, and GM-CSF in Patients With Advanced Melanoma
Recruiting
This phase II/III trial studies the side effects of nivolumab and ipilimumab when given together with or without sargramostim and to see how well they work in treating patients with stage III-IV melanoma that cannot be removed by surgery (unresectable) and that may have spread from where it first started to nearby tissue, lymph nodes, or distant parts of the body (advanced). Immunotherapy with monoclonal antibodies, such as ipilimumab and nivolumab, may help the body's immune system attack the c... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/16/2025
Locations: Kaiser Permanente-Anaheim, Anaheim, California
Conditions: Stage III Cutaneous Melanoma AJCC v7, Stage IV Cutaneous Melanoma AJCC v6 and v7
Detecting Pulmonary Hypertension With the Eko CORE 500 Digital Stethoscope
Recruiting
Brief Summary:
This prospective, observational study will evaluate whether synchronized heart sound (phonocardiogram, PCG) and three-lead electrocardiogram (ECG) recordings collected with the Eko CORE 500 can help screen for pulmonary hypertension (PH). Adults (≥18 years) undergoing clinically indicated transthoracic echocardiography and/or right heart catheterization (RHC) will complete one study visit (\~20 minutes). During the visit, study staff will obtain at least four 15-second CORE 500 r... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/15/2025
Locations: University of California Los Angeles, Los Angeles, California
Conditions: Pulmnary Hypertension
TMS-EEG Biomarkers for Chronic Pain
Recruiting
In this study the investigators aim to assess the correlates of neurophysiological measures (measurement of brain magnetically evoked response) using DELPHI system. The DELPHI system device is a computerized, electromechanical medical device that produces and delivers non-invasive Transcranial Magnetic Stimulation (TMS) fields to induce electrical currents directed at regions of the cerebral cortex and records the resultant Electroencephalogram (EEG) brain electrophysiological response. DELPHI a... Read More
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
08/15/2025
Locations: UCSF, San Francisco, California
Conditions: Chronic Pain
Phase 2, Efficacy and Safety Study of ACP-204 in Lewy Body Dementia Psychosis
Recruiting
Multicenter, randomized, 6-week, double-blind, placebo-controlled, parallel-group, Phase 2 study in subjects with LBDP.
Gender:
ALL
Ages:
Between 55 years and 84 years
Trial Updated:
08/15/2025
Locations: ATP Clinical Research Inc., Irvine, California
Conditions: Lewy Body Dementia Psychosis
A Study to Evaluate INCA035784 in Participants With Myeloproliferative Neoplasms
Recruiting
This study is being conducted to evaluate the safety and tolerability of INCA035784 in participants with myeloproliferative neoplasms.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/15/2025
Locations: Stanford University, Palo Alto, California
Conditions: Myeloproliferative Neoplasms
A Study to Evaluate the Efficacy and Safety of KarXT + KarX-EC for Cognitive Impairment in Alzheimer's Disease (MINDSET 2)
Recruiting
The purpose of this study is to evaluate the efficacy and safety of KarXT + KarX-EC for cognitive impairment in Alzheimer's Disease
Gender:
ALL
Ages:
Between 60 years and 85 years
Trial Updated:
08/15/2025
Locations: Fullerton Neurology and Headache Center, Fullerton, California
Conditions: Alzheimer's Disease
A Phase 3 Trial of MM120 for Major Depressive Disorder (Emerge)
Recruiting
A Phase 3 Double-blind, Placebo-controlled Study (Part A) with an Open-label Extension (Part B) Evaluating MM120 Compared to Placebo in Major Depressive Disorder - Emerge
Gender:
ALL
Ages:
Between 18 years and 74 years
Trial Updated:
08/15/2025
Locations: Kadima Neuropsychiatry Institute, La Jolla, California
Conditions: Major Depressive Disorder
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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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