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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.
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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 Phase 3 Study of Barzolvolimab in Participants With Chronic Spontaneous Urticaria
Recruiting
The purpose of this study is to establish the efficacy, safety and tolerability of barzolvolimab in adult participants with Chronic Spontaneous Urticaria (CSU) inadequately controlled by non-sedating second generation H1-antihistamines in comparison to placebo.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/11/2025
Locations: First OC Dermatology - Fountain Valley, Fountain Valley, California
Conditions: Chronic Spontaneous Urticaria
A Study to Evaluate the Effect of Aficamten in Pediatric Patients With Symptomatic Obstructive Hypertrophic Cardiomyopathy (oHCM).
Recruiting
The purpose of this study is to evaluate the efficacy, safety and PK of aficamten in a pediatric population with symptomatic obstructive hypertrophic cardiomyopathy (oHCM).
Gender:
ALL
Ages:
Between 12 years and 17 years
Trial Updated:
08/11/2025
Locations: Children's Hospital Los Angeles, Los Angeles, California
Conditions: Pediatric, Symptomatic Obstructive Hypertrophic Cardiomyopathy
Phage Therapy for Recurrent UTIs in Kidney Transplant Recipients
Recruiting
This proposal will take an important first step in the study of phage therapy for treatment of recurrent urinary tract infection (rUTI) in female kidney transplant recipients (KTR); a common condition that is associated with increasing multidrug resistance, sickness, loss of kidney function and death. The investigators will conduct a randomized phase I/II pilot clinical trial of targeted phage therapy versus placebo in asymptomatic female KTR with a history of rUTI due to Escherichia coli to ass... Read More
Gender:
FEMALE
Ages:
18 years and above
Trial Updated:
08/11/2025
Locations: University of California, San Diego, La Jolla, California
Conditions: Urinary Tract Infection, Recurrent
A Study Evaluating APG777 in Atopic Dermatitis
Recruiting
This is a two-part study that will evaluate the safety and efficacy of APG777 in participants with moderate-to-severe Atopic Dermatitis (AD). Part A (Proof-of-concept) and Part B (Dose-regimen Finding) will evaluate the safety and efficacy of various induction and maintenance dose regimens of APG777 compared to placebo. The study duration for any individual participant will be up to 106 weeks which includes: screening, induction, maintenance, and post-treatment follow-up periods. Participants ra... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/11/2025
Locations: Investigational Site, Fountain Valley, California
Conditions: Atopic Dermatitis
Peer Support for Adolescents and Emerging Adults With Sickle Cell Pain
Recruiting
The study, known as the Peer suppoRt for adolescents and Emerging adults with Sickle cell pain: promoting ENgagement in Cognitive behavioral thErapy (PRESENCE), aims to determine the effectiveness of digital CBT in reducing pain, opioid use, and healthcare utilization among AYAs with SCD. It also seeks to understand the role of personalized peer support in enhancing engagement and outcomes of digital CBT interventions.
By leveraging existing infrastructure for delivering virtual peer support in... Read More
Gender:
ALL
Ages:
Between 16 years and 30 years
Trial Updated:
08/11/2025
Locations: UCLA Mattel Children's Hospital Ronald Reagan Hospital, Los Angeles, California
Conditions: Pain, Sickle Cell Disease
Crohn's Disease: Efficacy, Safety, and Pharmacokinetics of Upadacitinib in Pediatric Subjects With Moderately to Severely Active Crohn's Disease
Recruiting
Crohn's disease (CD) is a long-lasting disease that causes severe inflammation (redness, swelling), in the digestive tract, most often affecting the bowels. It can cause many different symptoms including abdominal pain, diarrhea, tiredness, and weight loss. This study will assess how safe and effective oral Upadacitinib is in treating moderately to severely active Crohn's Disease in pediatric participants aged 2 to 18 years old who have had inadequate response, loss of response, intolerance, or... Read More
Gender:
ALL
Ages:
Between 2 years and 17 years
Trial Updated:
08/11/2025
Locations: UCSF Benioff Children's Hospital - Oakland /ID# 262217, Oakland, California
Conditions: Crohn's Disease
Open-label Extension Study of Seralutinib in Adult Subjects With PAH (PROSERA-EXT)
Recruiting
This open-label extension study will evaluate the long-term safety, tolerability and efficacy of orally inhaled seralutinib in subjects who have completed a previous seralutinib study
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
08/11/2025
Locations: Valley Advanced Lung Diseases Institute, Fresno, California
Conditions: Pulmonary Arterial Hypertension
Safety and Effectiveness of Endoscopic Intestinal Re-Cellularization Therapy in Individuals With Type II Diabetes
Recruiting
This study is designed to evaluate the safety and effectiveness of endoscopic intestinal re-cellularization therapy in individuals with type 2 diabetes (T2D) inadequately controlled on non-insulin glucose-lowering medications.
Gender:
ALL
Ages:
Between 22 years and 70 years
Trial Updated:
08/11/2025
Locations: Velocity Clinical Research, Gardena, Gardena, California
Conditions: Type 2 Diabetes Mellitus, Type2diabetes, Diabetes Mellitus, Type 2, Diabetes, Type 2 Diabetes
A Study of MGC026 in Participants With Advanced Solid Tumors
Recruiting
The study is designed to understand the safety, tolerability, pharmacokinetics, immunogenicity, and preliminary antitumor activity of MGC026 in participants with relapsed or refractory, unresectable, locally advanced or metastatic solid tumors The study has a dose escalation portion and a cohort expansion portion of the study.
Participants will receive MGC026 by intravenous (IV) infusion. The dose of MGC026 will be assigned at the time of enrollment. Participants may receive up to 35 treatments... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/11/2025
Locations: The Angeles Clinic and Research Institute, Los Angeles, California
Conditions: Advanced Solid Tumor, Advanced Cancer, Metastatic Cancer, Squamous Cell Carcinoma of Head and Neck, Non Small Cell Lung Cancer, Small-cell Lung Cancer, Bladder Cancer, Sarcoma, Endometrial Cancer, Melanoma, Castration Resistant Prostatic Cancer, Cervical Cancer, Colorectal Cancer, Gastric Cancer, Gastro-esophageal Cancer, Pancreas Cancer, Clear Cell Renal Cell Carcinoma, Hepatocellular Carcinoma, Platinum-resistant Ovarian Cancer, Breast Cancer, Ovarian Cancer, Esophageal Squamous Cell Cancer (SCC)
A Global Prospective Observational Registry of Patients With Pompe Disease
Recruiting
This is a global, multicenter, prospective, observational registry of patients with Pompe disease, including those with late-onset pompe disease (LOPD) and infantile-onset pompe disease (IOPD). Both untreated patients and those being treated with an approved therapy for Pompe disease are eligible to participate.
The objectives of the registry are:
* To evaluate the long-term safety of Pompe disease treatments through collection of data that describe the frequency of adverse events (AEs)/seriou... Read More
Gender:
ALL
Ages:
All
Trial Updated:
08/11/2025
Locations: University of California Irvine, Irvine, California
Conditions: Pompe Disease
A Phase III Study of Dato-DXd With or Without Durvalumab Compared With Investigator's Choice of Chemotherapy in Combination With Pembrolizumab in Patients With PD-L1 Positive Locally Recurrent Inoperable or Metastatic Triple-negative Breast Cancer
Recruiting
This is a Phase III, randomised, open-label, 3-arm, multicentre, international study assessing the efficacy and safety of Dato-DXd with or without durvalumab compared with investigator's choice chemotherapy in combination with pembrolizumab in participants with PD-L1 positive locally recurrent inoperable or metastatic TNBC.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/11/2025
Locations: Research Site, Duarte, California
Conditions: Breast Cancer
Open-Label Extension Study to Assess the Long-Term Safety and Tolerability of KarXT in Subjects With Psychosis Associated With Alzheimer's Disease (ADEPT-3)
Recruiting
This is a Phase 3 global, multicenter, 52-week, open-label extension (OLE) rollover study for subjects completing study CN012-0026, CN012-0027 or CN012-0056. Subjects (randomized or non-randomized) who complete the 38-week CN012-0026 study, 14-week CN012-0027 study or 14-week CN012-0056 study will be eligible to enroll in CN012-0028.
The primary objective of the study is to assess the long-term safety and tolerability of KarXT in subjects with psychosis associated with Alzheimer's Disease.
Gender:
ALL
Ages:
Between 55 years and 90 years
Trial Updated:
08/11/2025
Locations: Advanced Research Center, Inc., Anaheim, California
Conditions: Psychosis Associated With Alzheimer's Disease
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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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