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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.
2533 - 2544 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 to Assess Efficacy and Safety of KarXT for the Treatment of Psychosis Associated With Alzheimer's Disease (ADEPT-1)
Recruiting
This is a Phase 3, 38-week, randomized, double-blind, placebo-controlled, multicenter, outpatient study in subjects with psychosis associated with Alzheimer's Disease.
The primary objective of the study is to evaluate relapse prevention in subjects with psychosis associated with Alzheimer's Disease treated with KarXT compared to placebo. The secondary objectives of the study are to evaluate the time from randomization to discontinuation for any reason and safety and tolerability in subjects wit... Read More
Gender:
ALL
Ages:
Between 55 years and 90 years
Trial Updated:
06/10/2025
Locations: Asclepes Research, Encino, California
Conditions: Psychosis Associated With Alzheimer's Disease
Effect of Hepatic Impairment on the Pharmacokinetics and Safety of VIR-2218 and VIR-3434
Recruiting
In this study, a single dose of VIR-2218 up to 200 mg SC or VIR-3434 at 300 mg SC monotherapy or a combination of VIR-2218 and VIR-3434 will be administered to assess the pharmacokinetic (PK) exposure, safety, and tolerability of VIR-2218 and VIR-3434 in participants with cirrhosis and Hepatic Impairment, defined using the Child-Pugh-Turcotte (CPT) categorization.
Gender:
ALL
Ages:
Between 18 years and 70 years
Trial Updated:
06/10/2025
Locations: Inland Empire Clinical Trials, Rialto, California
Conditions: Hepatic Impairment, Cirrhosis
A Clinical Study to Evaluate the Safety and Efficacy of ETX101 in Infants and Children With SCN1A-Positive Dravet Syndrome
Recruiting
ENDEAVOR is a Phase 1/2, 2-part, multicenter study to evaluate the safety and efficacy of ETX101 in participants with SCN1A-positive Dravet syndrome aged ≥6 to \<36 months (Part 1) and aged ≥6 to \<48 months (Part 2). Part 1 follows an open-label, dose-escalation design, and Part 2 is a randomized, double-blind, sham delayed-treatment control, dose-selection study.
Gender:
ALL
Ages:
Between 6 months and 47 months
Trial Updated:
06/10/2025
Locations: UCSF Benioff Children's Hospitals, San Francisco, California
Conditions: Dravet Syndrome
LMN-201 for Prevention of C. Difficile Infection Recurrence
Recruiting
This is a multisite study to evaluate the safety, tolerability, and efficacy of LMN-201 in participants recently diagnosed with CDI who are scheduled to receive or are receiving SOC antibiotic therapy against C. difficile.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/10/2025
Locations: Kaiser Permanente, Escondido, California
Conditions: Clostridioides Difficile Infection
Impact of Behavior Modification Interventions and Lung Cancer Screening on Smoking Cessation in People Living With HIV: A Feasibility Study
Recruiting
This clinical trial evaluates the usefulness of using a smartphone-based HIV-specific smoking cessation intervention at the time of lung cancer screening in helping people living with HIV quit smoking. Positively Smoke Free - Mobile may help patients with HIV quit smoking.
Gender:
ALL
Ages:
Between 45 years and 80 years
Trial Updated:
06/10/2025
Locations: UC San Diego Moores Cancer Center, La Jolla, California
Conditions: HIV Infection, Tobacco-Related Carcinoma
A Study Using [18F]F AraG PET to Evaluate Response to Checkpoint Inhibitor Therapy(CkIT) in Patients With Solid Tumors
Recruiting
In this study, patients with advanced solid tumors will undergo \[18F\]F AraG PET/CT imaging to assess for changes in tracer uptake following treatment with CkIT.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/10/2025
Locations: Stanford University, Stanford, California
Conditions: Correlate Tracer Uptake to TCell Tumor Infiltration & CkIT Benefit
Anticoagulation for Stroke Prevention In Patients With Recent Episodes of Perioperative AF After Noncardiac Surgery
Recruiting
Multinational, investigator-initiated study of oral anticoagulation versus no anticoagulation for the prevention of stroke and other adverse cardiovascular events in patients with transient perioperative atrial fibrillation after noncardiac surgery and additional stroke risk factors.
Gender:
ALL
Ages:
55 years and above
Trial Updated:
06/10/2025
Locations: Cedars-Sinai Medical Center, Los Angeles, California
Conditions: Stroke, Atrial Fibrillation
A Study of NanO2™ Combined With Radiation and Temozolomide in Patients With Newly Diagnosed GBM
Recruiting
This clinical trial is testing the safety and efficacy of NanO2TM administered via intravenous infusion in combination with standard radiation and chemotherapy.
NanO2TM is being developed to increase the amount of oxygen delivered to tumors which is hoped to increase the effectiveness of radiation therapy.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/10/2025
Locations: UC Irvine Health- Chao Family Comprehensive Cancer Center, Orange, California
Conditions: Glioblastoma Multiforme
ECoG BMI for Motor and Speech Control
Recruiting
Test the feasibility of using electrocorticography (ECoG) signals to control complex devices for motor and speech control in adults severely affected by neurological disorders.
Gender:
ALL
Ages:
21 years and above
Trial Updated:
06/10/2025
Locations: University of California San Francisco, San Francisco, California
Stereotactic Radiosurgery Compared With Hippocampal-Avoidant Whole Brain Radiotherapy (HA-WBRT) Plus Memantine for 5 or More Brain Metastases
Recruiting
Stereotactic radiosurgery (SRS) is a commonly used treatment for brain tumors. It is a one-day (or in some cases two day), out-patient procedure during which a high dose of radiation is delivered to small spots in the brain while excluding the surrounding normal brain.
Whole brain radiation therapy with hippocampal avoidance (HA-WBRT) is when radiation therapy is given to the whole brain, while trying to decrease the amount of radiation that is delivered to the area of the hippocampus. The hipp... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/10/2025
Locations: City of Hope Corona, Corona, California
Conditions: Brain Metastases
Regional Radiotherapy in Biomarker Low-Risk Node Positive and T3N0 Breast Cancer
Recruiting
The purpose of this study is to compare the effects on low risk breast cancer receiving usual care that includes regional radiation therapy, with receiving no regional radiation therapy. Researchers want to see if not giving this type of radiation treatment works as well at preventing breast cancer from coming back.
Gender:
FEMALE
Ages:
35 years and above
Trial Updated:
06/10/2025
Locations: Kaiser Permanente-Anaheim, Anaheim, California
Conditions: Breast Cancer
ColoCare Study - Colorectal Cancer Cohort
Recruiting
ColoCare is an international prospective cohort study of stage I-IV colorectal cancer patients (ICD-10 C18-C20).
Gender:
ALL
Ages:
Between 18 years and 89 years
Trial Updated:
06/10/2025
Locations: Cedars-Sinai Medical Center, Los Angeles, California
Conditions: Colorectal Cancer
2533 - 2544 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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