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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.
2725 - 2736 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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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
Birth Control Clinical Research Study
Recruiting
Living with obesity and looking for a birth control option that is right for you? Clinical trials are now enrolling women with a body mass index (BMI) of 30 or more in the area to help study a potential new progestin-only contraceptive patch. Participating in research studies can help advance birth control options. Don’t let financial stress hold you back. All study-related assessments, care, and study patch are available at no cost. You may also be reimbursed for study-related travel.
Conditions:
Obesity
Overweight
Overweight and 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
A Study of Vedolizumab With and Without Upadacitinib in Adults With Crohn's Disease
Recruiting
The main aim of this study is to learn whether vedolizumab and upadacitinib given together (also called dual targeted therapy or DTT) reduces bowel inflammation and ulcers in the bowel compared to vedolizumab only (also called monotherapy) in adults with moderately or severely active Crohn's Disease (CD) after 12 weeks of treatment. Other aims are to learn how safe and effective DTT is compared to monotherapy for these participants.
All participants will receive DTT (either vedolizumab and upad... Read More
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
05/28/2025
Locations: UCSD Medical Center, La Jolla, California
Conditions: Crohn's Disease
Sotagliflozin to Slow Kidney Function Decline in Persons With Type 1 Diabetes and Diabetic Kidney Disease
Recruiting
Powerful new drugs that can prevent or delay end stage kidney disease (ESKD) - so called sodium-glucose cotransporter-2 inhibitors (SGLT2i) - are now available for patients with type 2 diabetes. Whether these drugs have similar effects in patients with type 1 diabetes (T1D) remains unknown because of the few studies in this population, due to concerns about the increase in risk of diabetic ketoacidosis (DKA, a serious, potentially fatal acute complication of diabetes due to the accumulation of s... Read More
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
05/28/2025
Locations: Stanford University Medical Center, Stanford, California
Conditions: Diabetic Nephropathies, Kidney Failure, Chronic, Diabetes Mellitus Type 1, Heart Failure
Examining Intranasal Oxytocin Augmentation of Brief Couples Therapy for Veterans With PTSD
Recruiting
Leveraging veterans' intimate relationships during treatment for posttraumatic stress disorder (PTSD) has the potential to concurrently improve PTSD symptoms and relationship quality. Brief Cognitive-Behavioral Conjoint Therapy (bCBCT) is a manualized treatment designed to simultaneously improve PTSD and relationship functioning for couples in which one partner has PTSD. Although efficacious in improving PTSD, the effects of CBCT on relationship satisfaction are small, especially among Veterans.... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: VA San Diego Healthcare System, San Diego, CA, San Diego, California
Conditions: Post-Traumatic Stress Disorder (PTSD)
AZD0486 as Monotherapy in B-cell Acute Lymphoblastic Leukaemia
Recruiting
This is a Phase 1/2, global multicentre, open-label, single-arm, dose escalation and dose optimisation study of AZD0486 to evaluate the safety, tolerability, and efficacy of AZD0486 monotherapy in participants with R/R B ALL who have received ≥ 2 prior lines of therapies. The study will consist of 3 parts. Part A monotherapy dose escalation. Part B dose optimisation. Part C Dose expansion at the recommended phase 2 dose (RP2D)
Gender:
ALL
Ages:
12 years and above
Trial Updated:
05/28/2025
Locations: Research Site, Duarte, California
Conditions: B-cell Acute Lymphoblastic Leukemia (B-ALL)
Efficacy/Safety of ALTB-268 in Subjects w/Moderately to Severely Active UC Refractory to Biologics
Recruiting
ALTB-268-201 is a Phase 2a, multicenter, single arm, multiple-dose, open-label study evaluating the efficacy and safety of ALTB-268 in subjects with moderately to severely active UC. The study consists of a Screening Phase, an Induction Phase, a Maintenance Phase, and an OLE.
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
05/28/2025
Locations: San Diego Gastroenterology, San Diego, California
Conditions: Ulcerative Colitis
An International, Multicenter, Randomized, Double-Blind, Parallel Group, Vehicle-Controlled, Phase 2/3 Study With Open-Label Extension Evaluating the Efficacy and Safety of Diacerein 1% Ointment for the Treatment of Generalized Epidermolysis Bullosa Simplex (EBS)
Recruiting
The proposed Phase 2/3 trial with double-blind and open-label extension phases is an international, multicenter study designed to assess the efficacy and safety of diacerein 1% ointment in patients with generalized EBS.
Gender:
ALL
Ages:
6 months and above
Trial Updated:
05/28/2025
Locations: Mission dermatology Center, Rancho Santa Margarita, California
Conditions: Generalized Epidermolysis Bullosa Simplex
Achieving Understanding of the Natural History of Sickle Cell Trait (AUNT)
Recruiting
The main purpose of this study is to create a longitudinal cohort of those with Sickle Cell Trait (SCT) to better understand the hematologic phenotype for those that carry HbS, assess for differences in those with varying quantities of HbS and assess for potential clinical complications of SCT.
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
05/28/2025
Locations: Loma Linda University Health Care, Loma Linda, California
Conditions: Sickle Cell Trait
Regorafenib in Combination With Pembrolizumab or Pembrolizumab for MSI-H Colorectal Cancer
Recruiting
This is a trial of Regorafenib in combination with pembrolizumab for patients with MSI-H colorectal cancer consisting of lead-in phase examining preliminary efficacy and safety, followed by a randomized phase to further examine efficacy.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: City of Hope, Irvine, California
Conditions: MSI-H Colorectal Cancer
Variations in Ketone Metabolism
Recruiting
This outcome of this study will elucidate how the phenotype of the individual modulates the KE metabolic effect. Most studies of KE have been in homogenous populations, usually young, male athletes. However, two striking experiments using identical, body weight adjusted KE doses in healthy and obese individuals found that BHB area under the curve (AUC) and removal was reduced by obesity and poor metabolic health. Similarly, ketone infusion experiments found that diabetes, obesity, and insulin re... Read More
Gender:
ALL
Ages:
Between 20 years and 70 years
Trial Updated:
05/28/2025
Locations: The Buck Institute, Novato, California
Conditions: Ketosis
Clinical Study of Ivonescimab for First-line Treatment of Metastatic NSCLC Patients
Recruiting
This is a Phase 3 Randomized, double-blind, Multiregional Study of Ivonescimab Combined with Chemotherapy Versus Pembrolizumab Combined with Chemotherapy for the First-line Treatment of Metastatic Non-small Cell Lung Cancer. The primary endpoint is overall survival and progression free survival assessed by investigator. The key secondary endpoints include response and safety.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: Clinical Study Site, Cerritos, California
Conditions: Non-Small Cell Lung Cancer
Detection and Risk Stratification in Veterans Presenting With Microscopic Hematuria
Recruiting
It is of current debate whether the use of invasive (referring to a process that requires insertion into the body) standard of care procedures such as a cystoscopy which is a procedure to look inside the bladder using a thin camera called a cystoscope, is appropriate for use in patients with microscopic hematuria or blood in urine invisible to the naked eye. This is because the risk of disease (bladder cancer - urothelial carcinoma) is relatively low in this population group, approximately 3%. I... Read More
Gender:
ALL
Ages:
Between 18 years and 89 years
Trial Updated:
05/28/2025
Locations: Tri Valley Urology Medical Group, Murrieta, California
Conditions: Urothelial Carcinoma
Phosphatase Inhibition by Intracoronary Gene Therapy in Subjects With Non-Ischemic NYHA Class III Heart Failure
Recruiting
This is a Phase 2 adaptive, double-blinded, placebo-controlled, randomized, multi-center trial study to evaluate the safety and efficacy of a single dose of AB-1002, administered via antegrade intracoronary artery infusion, in males and females age \>18 years with non-ischemic cardiomyopathy and NYHA Class III symptoms of HF.
Subjects will be randomized into one of three treatment groups in a 1:1:1
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: University of California San Diego, La Jolla, California
Conditions: Congestive Heart Failure
2725 - 2736 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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