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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.
3421 - 3432 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
Paid Clinical Studies Nationwide
Recruiting
Nationwide clinical trials offered in your area. Some trials offering up to several thousand dollars in compensation for participation.
Conditions:
Healthy
Healthy Volunteer Study
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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
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
Featured Trial
COVID-19 Vaccine Clinical Trial (Compensation Provided)
Recruiting
Healthy adults ages 50-64 may qualify. You may be eligible if you haven’t received a COVID-19 vaccine and haven’t had COVID-19 in the last 90 days.
Qualified participants may receive compensation for time and travel.
Qualified participants may receive compensation for time and travel.
Conditions:
Healthy
MOTIV BTK Randomized Controlled Trial
Recruiting
Pre-market clinical evaluation of the MOTIV Sirolimus-Eluting Bioresorbable Scaffold for the planned treatment of infrapopliteal lesions.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
04/01/2025
Locations: Adventist Health, Saint Helena, California
Conditions: Critical Limb Ischemia
Evaluate the Safety of DEXYCU for the Treatment of Inflammation Following Ocular Surgery for Childhood Cataract
Recruiting
A Phase 3/4, Prospective, Randomized, Active Treatment-Controlled, Parallel-Design, Multicenter Study to Evaluate the Safety of DEXYCUfor the Treatment of Inflammation Following Ocular Surgery for Childhood Cataract
Gender:
ALL
Ages:
3 years and below
Trial Updated:
04/01/2025
Locations: EyePoint Investigational Site, Huntington Beach, California
Conditions: Cataract
Study to Evaluate the Safety and Efficacy of Daily Subcutaneous Metreleptin Treatment in Subjects With PL
Recruiting
This is a Phase III, double-blind, placebo-controlled, safety and efficacy study of daily SC metreleptin in subjects with Partial Lipodystrophy.
Gender:
ALL
Ages:
12 years and above
Trial Updated:
04/01/2025
Locations: UC Davis, Sacramento, California
Conditions: Partial Lipodystrophy
Evaluation of Smoked THC and CBD in Men and Women
Recruiting
The purpose of this study is to determine the pharmacokinetics and pharmacodynamics of inhaled cannabis with varying amounts of delta-9-tetrahydrocannabinol (THC), and cannabidiol (CBD) and to evaluate detection of recently smoked THC in oral fluid.
Gender:
ALL
Ages:
Between 21 years and 55 years
Trial Updated:
04/01/2025
Locations: University of California, Los Angeles, Los Angeles, California
Conditions: Drug Abuse, Intoxication by Drug, Impairment
Study to Detect Changes in Urinary and Gut Microbiome During Androgen Deprivation Therapy and Radiation Therapy in Patients With Prostate Cancer
Recruiting
This study collects urine and stool samples to determine the ability to identify changes in the microbiome (bacteria, fungi, and viruses that live in the gut and urine) of patients with prostate cancer during androgen deprivation therapy and radiation therapy. Radiation therapy has the potential to harm the genitourinary area or the bowel, causing a feeling of urgency or increased inflammation in the area. The radiation therapy is designed to not irradiate the bowel and bladder areas, but there... Read More
Gender:
MALE
Ages:
18 years and above
Trial Updated:
04/01/2025
Locations: City of Hope Medical Center, Duarte, California
Conditions: Stage I Prostate Cancer AJCC v7, Stage II Prostate Cancer AJCC v7, Stage IIA Prostate Cancer AJCC v7, Stage IIB Prostate Cancer AJCC v7, Stage III Prostate Cancer AJCC v7, Stage IV Prostate Cancer AJCC v7
Effects of Brain Stimulation on Cognition, Oscillations and GABA Levels in Schizophrenia
Recruiting
People with schizophrenia often have problems with attention, learning and memory and other cognitive abilities that interfere with their work and school performance. Unfortunately, even our best treatments often do not significantly reduce these cognitive problems. The current study investigates whether or not delivering a very small electrical current to people's foreheads (called, transcranial direct current stimulation; (tDCS)) might improve functioning in the front part of the brain and red... Read More
Gender:
ALL
Ages:
Between 18 years and 47 years
Trial Updated:
04/01/2025
Locations: Imaging Research Center, Sacramento, California
Conditions: Schizophrenia
Evaluation of AI Cost Prediction Model to Enroll Patients in Complex Care Management Program
Recruiting
Currently, UCLA Health (specifically the Office of Population Health and Accountable Care, or OPHAC) runs a complex care management program called Proactive Care (goal is to reduce care utilization by providing personalized care navigation/case management). Every month, an AI Population Risk tool runs to identify around 250 of the 480,000 or so UCLA primary care patients, and RNs contact these 250 patients to enroll in Proactive Care. Starting in December 2024, OPHAC launched a new method of enr... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
03/31/2025
Locations: UCLA Health, Los Angeles, California
Conditions: Chronic Disease
To Determine the Effect of KP-001 on Rosuvastatin, Caffeine PK and the Effect of Fluvoxamine on KP-001 PK in Volunteers
Recruiting
Part 1 will evaluate the effects of KP-001 as an inhibitor of BCRP on the PK of rosuvastatin. In the Treatment Period 1, a single dose of rosuvastatin will be administered. In the Treatment Period 2, KP-001 will be administered once daily for 7 days and a single dose of rosuvastatin will be administered. Blood PK assessments of rosuvastatin will be performed until 48 hours postdose in each Treatment Period. Part 2 will evaluate the effects of KP-001 as an inducer and inhibitor of CYP1A2 on the P... Read More
Gender:
ALL
Ages:
Between 18 years and 55 years
Trial Updated:
03/31/2025
Locations: Parexel International Early Phase Clinical Unit, Glendale, California
Conditions: Healty Volunteers
Analgesic Response to Opioids in Patients With Fibromyalgia After Conventional Acupuncture Versus Sham Acupuncture
Recruiting
This study aims to see whether acupuncture can help fibromyalgia patients by giving them acupuncture treatment and seeing whether acupuncture helps enhance the effects of an opioid.
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
03/31/2025
Locations: UCI Health Susan Samueli Integrative Health Institute, Irvine, California
Conditions: Fibromyalgia
To Evaluate the Safety and Efficacy of MANP in Subjects With Difficult to Control/ Resistant Hypertension
Recruiting
This is a Phase 2 dose-titration study designed to evaluate the safety and efficacy of MANP subcutaneous injection compared to placebo in reducing baseline daytime systolic blood pressure (SBP), derived from 24-hour ambulatory blood pressure monitoring (ABPM), in subjects with hypertension who are taking 3 or more antihypertensive medications with different mechanisms of action.
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
03/31/2025
Locations: Amicis Research Center - Beverly Hills, Beverly Hills, California
Conditions: Difficult to Control Hypertension
Radicle Clarity 24: A Study of Health and Wellness Products on Cognitive Function and Related Health Outcomes
Recruiting
A randomized, double-blind, placebo-controlled direct-to-consumer study of health and wellness products on cognitive function and related health outcomes
Gender:
ALL
Ages:
Between 21 years and 105 years
Trial Updated:
03/31/2025
Locations: Radicle Science, Inc, Del Mar, California
Conditions: Cognitive Function
IMPRoving Outcomes in Vascular DisEase- Aortic Dissection
Recruiting
The goal of this clinical trial is to determine whether an upfront invasive strategy of TEVAR plus medical therapy reduces the occurrence of a composite endpoint of all-cause death or major aortic complications compared to an upfront conservative strategy of medical therapy with surveillance for deterioration in patients with uncomplicated type B aortic dissection.
Gender:
ALL
Ages:
21 years and above
Trial Updated:
03/31/2025
Locations: Memorial Care Long Beach Medical Center, Long Beach, California
Conditions: Type B Aortic Dissection
3421 - 3432 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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