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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.
3457 - 3468 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).
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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
Immunomodulatory Effects of Fasting in Healthy Adults
Recruiting
This is a clinical trial assessing the effects of fasting on the immune system in healthy adults. Immune profiling, gene expression profiling, and flow cytometry on peripheral blood mononuclear cells (PBMCs) will be performed and we hypothesize that a period of fasting will alter the immune system in healthy adults.
Gender:
ALL
Ages:
Between 20 years and 40 years
Trial Updated:
03/27/2025
Locations: UC Davis, Sacramento, California
Conditions: Fasting
Tumescence in HNC Skin Graft Reconstruction
Recruiting
Our primary objective is to determine if the use of tumescence has a meaningful effect on STSG uptake at the recipient site. This is an important outcome because poor graft uptake results in the need for prolonged local wound care, additional clinic visits for patients and increased risk of infection. A prospective, randomized comparison of the tumescence to our current standard of care will allow us to definitively evaluate any benefits to this technique.
Tumescence is commonly used in the tre... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
03/27/2025
Locations: UC Davis Health, Sacramento, California
Conditions: Head and Neck Cancer, Surgery--Complications, Graft Failure
Utilization of Negative Pressure Suction to Reduce Aspiration in Oropharyngeal Dysphagia
Recruiting
This is an investigator initiated prospective study to determine whether the use of a negative pressure suction in the hypopharynx will reduce the amount of aspiration during Video Fluoroscopic Swallowing Exam (VFSE) among patients with oropharyngeal dysphagia.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
03/27/2025
Locations: UC Davis Medical Center, Sacramento, California
Conditions: Oropharyngeal Dysphagia
International Penile Advanced Cancer Trial (International Rare Cancers Initiative Study)
Recruiting
This is an international phase III trial, with a Bayesian design, incorporating two sequential randomisations. It efficiently examines a series of questions that routinely arise in the sequencing of treatment. The study design has evolved from lengthy international consultation that has enabled us to build consensus over which questions arise from current knowledge and practice. It will enable potential randomisation for the majority of patients with inguinal lymph node metastases and will provi... Read More
Gender:
MALE
Ages:
18 years and above
Trial Updated:
03/27/2025
Locations: Los Angeles County-USC Medical Center, Los Angeles, California
Conditions: Squamous Cell Carcinoma of the Penis, Usual Type
Exercise and Movement to Enhance Resiliency in Cancer Patients
Recruiting
This is a single-center, pilot, hybrid type 1 design implementation study to evaluate the feasibility and implementation of a personalized digital exercise program and a virtual support group to improve patient-centered outcomes in patients receiving treatment for gynecologic cancer receiving treatment at University of California, San Francisco.
Gender:
FEMALE
Ages:
18 years and above
Trial Updated:
03/26/2025
Locations: University of California, San Francisco, San Francisco, California
Conditions: Gynecologic Cancer
Stroke and CPAP Outcome Study 3 Randomized Controlled Trial
Recruiting
The SCOUTS 3 study aims to test the effectiveness of an intensive CPAP (Continuous Positive Airway Pressure) therapy support program compared to usual care in stroke patients with obstructive sleep apnea (OSA) during inpatient rehabilitation (IPR).
The study is a multicenter randomized controlled trial (RCT) involving recruitment of about 250 participants across two institutions and randomization of about 200 participants. It compares an intensive support (IS) program for CPAP use with standard... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
03/26/2025
Locations: Rancho Research Institute, Downey, California
Conditions: Stroke Patients, CPAP, OSA - Obstructive Sleep Apnea
An Efficacy, Safety, and Tolerability Study of VRDN-003 in Participants with Chronic Thyroid Eye Disease (TED)
Recruiting
This is a clinical trial assessing the efficacy, safety, and tolerability of an investigational drug, VRDN-003, in participants with chronic Thyroid Eye Disease (TED).
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
03/26/2025
Locations: Alliance Research Institute - Canoga Park, Canoga Park, California
Conditions: Thyroid Eye Disease
Effects of Watermelon or Low-fat Cookie Consumption on Wellness
Recruiting
The objective of the proposed research is to determine the effects of fresh watermelon consumption on physiological indicators of wellness regarding sexual, skin and gut health in adults.
Gender:
ALL
Ages:
Between 18 years and 50 years
Trial Updated:
03/26/2025
Locations: School of Exercise and Nutritional Sciences, San Diego, California
Conditions: Overweight and Obesity
An App-based Instructional Platform to Improve Eye Drop Recall
Recruiting
The goal of this interventional study is to assess whether an in-office, language-concordant instructional app improves drop regimen recall in a population of glaucoma patients who are on multi-drop regimens.
Participants will be divided into two groups -- those who use the app and those who do not. The app will have narrated information regarding the drop regimen, a quiz to test understanding of the regimen, and will enable a graphical printout of the eye drops and schedule.
At one month, bot... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
03/26/2025
Locations: San Francisco General Hospital, San Francisco, California
Conditions: Glaucoma
Impact of Neurochecks on Sleep in Critically Ill Adults
Recruiting
Background: Following acute brain injury (ABI), patients are monitored in the intensive care unit (ICU) where providers rely on frequent neurological examinations ("neurochecks") to assess for neurodeterioration. Serial neurochecks are part of guideline recommendations, but there is equipoise between hourly (Q1) and every-other-hour (Q2) evaluation. In the ICU, care-related awakenings occur frequently, but it is unclear if differential neurocheck frequencies result in differential sleep, providi... Read More
Gender:
ALL
Ages:
Between 18 years and 100 years
Trial Updated:
03/26/2025
Locations: UC San Diego Health, San Diego, California
Conditions: Cerebral Aneurysm
Dietary Intervention to Improve Kidney Transplant Outcomes
Recruiting
Randomized controlled trial of a curriculum intervention teaching patients to eat a whole-food plant-based dietary pattern versus standard of care in kidney transplant recipients within the first few months of transplant
Gender:
ALL
Ages:
18 years and above
Trial Updated:
03/26/2025
Locations: UC Davis, Sacramento, California
Conditions: Kidney Transplant; Complications, Kidney Diseases, Transplant;Failure,Kidney, Diabetes, Hypertension, Obesity, Diet, Healthy, Lifestyle, Healthy
Children's Bipolar Network Treatment Trial I
Recruiting
This is a naturalistic treatment and follow-up study of youth with bipolar spectrum disorders (BSDs) across four US sites of The Childhood Bipolar Network (CBN). CBN sites have expertise in diagnosing, assessing, and treating BSDs in youth. The primary aims of this study are to (1) identify and reliably diagnose youth (ages 9 to 19 yrs) with full bipolar disorder (BD) and BSDs, and (2) examine predictors (e.g., mood instability, inflammatory marker C-reactive protein) of clinical outcome over a... Read More
Gender:
ALL
Ages:
Between 9 years and 19 years
Trial Updated:
03/26/2025
Locations: University of California, Los Angeles, Max Gray Child and Adolescent Mood Disorders Program (CHAMP), Los Angeles, California
Conditions: Bipolar Disorder, Bipolar I Disorder, Bipolar II Disorder, Other Specified Bipolar and Related Disorder, Mood Instability, Child Mental Disorder, Adolescent - Emotional Problem
3457 - 3468 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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