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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.
3397 - 3408 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
An Exosome-Based Liquid Biopsy for the Differential Diagnosis of Primary Liver Cancer
Recruiting
It is sometimes difficult to precisely understand whether a primary liver cancer is a hepatocellular carcinoma or a cholangiocarcinoma. The researchers will develop and validate a liquid biopsy, based on exosomal content analysis and powered by machine learning, to help clinicians differentiate these two cancers before surgery.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
04/01/2025
Locations: City of Hope Medical Center, Duarte, California
Conditions: Hepatocellular Carcinoma, Intrahepatic Cholangiocarcinoma, Cholangiocarcinoma, Primary Liver Cancer, Primary Liver Carcinoma, Hepatic Cancer, Hepatic Carcinoma
A Phase Ia/Ib, First-in-human (FIH) Study for Safety, Tolerability, Pharmacokinetics (PK), and Clinical Activity Evaluation of ADEL-Y01
Recruiting
This is a Phase Ia/Ib, two-part, randomized, placebo-controlled, double-blinded, first in human(FIH) study to evaluate the safety, tolerability, PK, and PD of ADEL-Y01 in healthy participants in Part 1 and participants with MCI due to AD and mild AD in Part 2. The study includes 2 parts: Part 1 (single ascending dose \[SAD\] and Part 2 (multiple ascending dose \[MAD\]).
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
04/01/2025
Locations: CenExel ACT, Anaheim, California
Conditions: Alzheimer Disease
A Multicenter Multinational Observational Study of Children With Hypochondroplasia
Recruiting
This study will assess growth over time and the clinical course of HCH in children by collecting growth measurements and other variables of interest.
Gender:
ALL
Ages:
15 years and below
Trial Updated:
04/01/2025
Locations: Cedars-Sinai Medical Center, Los Angeles, California
Conditions: Hypochondroplasia
Study of Lenacapavir and Emtricitabine/Tenofovir Disoproxil Fumarate (F/TDF) in Prevention of HIV in Cisgender Women in the United States (HPTN 102)
Recruiting
The goal of this clinical study is to look at how lenacapavir (LEN) passes through the body and to assess the safety of LEN and emtricitabine/tenofovir disoproxil fumarate (F/TDF) for prevention of HIV in the cisgender women in the US.
The primary objectives of this study are: 1) to characterize the pharmacokinetics (PK) of LEN in United States (US) cisgender women; 2) to evaluate the safety of LEN and F/TDF for pre-exposure prophylaxis (PrEP) in US cisgender women; and 3) to evaluate the gener... Read More
Gender:
FEMALE
Ages:
18 years and above
Trial Updated:
04/01/2025
Locations: UCSD Antiviral Research Center (AVRC), San Diego, California
Conditions: Pre-Exposure Prophylaxis of HIV Infection
Neonatal Pulse Oximetry Disparities Due to Skin Pigmentation
Recruiting
The goal of this clinical trial is to determine if pulse oximeters show an SaO2-SpO2 discrepancy that correlates with skin pigmentation such that pulse oximetry will overestimate oxygenation in newborns with darker skin. The main questions it aims to answer is if SaO2-SpO2 discrepancy varies with the degree of skin pigmentation among neonates, if gestational age has an influence on SaO2-SpO2 discrepancy, and if packed red blood cell (PRBC) transfusion has an influence on SaO2-SpO2 discrepancy in... Read More
Gender:
ALL
Ages:
10 days and below
Trial Updated:
04/01/2025
Locations: UC Davis Health, Sacramento, California
Conditions: Skin Pigment, Pulse Oximetry
Study of RMC-9805 in Participants With KRAS G12D-Mutant Solid Tumors
Recruiting
This study is to evaluate the safety and tolerability of RMC-9805 as monotherapy and in combination with RMC-6236 in adults with KRAS G12D-mutant solid tumors.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
04/01/2025
Locations: University of California, Davis Comprehensive Cancer Center, Sacramento, California
Conditions: Non-small Cell Lung Cancer (NSCLC), Colorectal Cancer (CRC), Pancreatic Ductal Adenocarcinoma (PDAC), Advanced Solid Tumors
Intermittent Fasting Using a Fasting-Mimicking Diet to Improve Prostate Cancer Control and Metabolic Outcomes
Recruiting
This is a Phase 2, randomized two-armed, multi-site study of 138 patients with metastatic castrate sensitive prostate adenocarcinoma. Patients will be randomized 1:1 to receive the fasting mimicking diet, or usual diet. All patients will receive standard of care treatment for their prostate cancer. The fasting mimicking diet will be consumed for 5 days per month for a total of 6 months and will be monitored by trained research dietitians.
This study aims to examine the effects of a fasting mimi... Read More
Gender:
MALE
Ages:
All
Trial Updated:
04/01/2025
Locations: Beckman Research Institute of the City of Hope, Duarte, California
Conditions: Prostate Adenocarcinoma
A Supervised Prehabilitation Program for Patients With Pancreatic Cancer
Recruiting
The purpose of this study is to assess the use of an exercise program in people with pancreatic cancer.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
04/01/2025
Locations: Cedars-Sinai Medical Center, Los Angeles, California
Conditions: Pancreas Cancer
Autologous Activated Adipose-derived Stem Cells (RB-ADSC) Injected Directly Into the Brain for Mild to Moderate Alzheimer's Disease
Recruiting
This is a research study to evaluate the safety of an investigational autologous cell product obtained from participant's own adipose tissue as a possible treatment for Alzheimer disease.
Gender:
ALL
Ages:
Between 45 years and 80 years
Trial Updated:
04/01/2025
Locations: Hoag Memorial Hospital Presbyterian, Newport Beach, California
Conditions: Alzheimer Disease
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
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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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