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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.
1417 - 1428 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
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 Offer
Find the Best GLP-1 Weight Loss Providers (2025)
Recruiting
Cutting-edge GLP-1 treatments like semaglutide and tirzepatide are helping thousands lose weight with medically guided support. But with so many online providers, how do you know which programs are trusted, affordable, and right for you?
We reviewed the top GLP-1 brands of 2025 — comparing pricing, prescription process, shipping, pharmacy partners, and real user ratings — to help you find a safe, convenient, and effective path toward your weight-loss goals.
- 100% online programs
- Licensed U.S. clinicians
- Fast shipping & flexible payments
See the rankings & choose the GLP-1 provider that fits your life.
We reviewed the top GLP-1 brands of 2025 — comparing pricing, prescription process, shipping, pharmacy partners, and real user ratings — to help you find a safe, convenient, and effective path toward your weight-loss goals.
- 100% online programs
- Licensed U.S. clinicians
- Fast shipping & flexible payments
See the rankings & choose the GLP-1 provider that fits your life.
Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid 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
The Effects of Positive Airway Pressure on the Mucolytic Effects of NAC (TEAM)
Recruiting
The goal of this clinical trial is to determine if positive pressure during inspiration will improve penetration of aerosolized N-Acetylcysteine (NAC) into airway mucus plugs in the lungs of patients with asthma or Chronic Obstructive Pulmonary Disease (COPD).
The main questions it aims to answer are:
* Does delivery of aerosolized NAC with positive inspiratory pressure have a greater effect on mucus plug burden in the lungs than delivery of NAC without positive pressure.
* Does delivery of ae... Read More
Gender:
ALL
Ages:
Between 18 years and 85 years
Trial Updated:
07/28/2025
Locations: UCSF Airway Clinical Research Center, San Francisco, California
Conditions: Asthma, COPD
SLC13A5 Deficiency Natural History Study - United States Only
Recruiting
SLC13A5 deficiency (Citrate Transporter Disorder, EIEE 25) is a rare genetic disorder with neurodevelopmental delays and seizure onset in the first few days of life. This natural history study is designed to address the lack of understanding of disease progression. Additionally it will identify clinical and biomarker endpoints for use in future clinical trials.
Gender:
ALL
Ages:
All
Trial Updated:
07/28/2025
Locations: Lucille Packard Children's Hospital, Stanford University, Palo Alto, California
Conditions: Citrate Transporter Deficiency, Epilepsy, Rare Diseases, Movement Disorders, Genetic Disorder, SLC13A5 Deficiency, EIEE25, Kohlschutter-Tonz Syndrome (Non-ROGDI), Citrate Transporter Disorder, DEE25
MAGNITUDE: A Phase 3 Study of NTLA-2001 in Participants With Transthyretin Amyloidosis With Cardiomyopathy (ATTR-CM)
Recruiting
To evaluate the efficacy and safety of a single dose of NTLA-2001 compared to placebo in participants with ATTR-CM.
Gender:
ALL
Ages:
Between 18 years and 90 years
Trial Updated:
07/28/2025
Locations: Cedars-Sinai Medical Center, Los Angeles, California
Conditions: Transthyretin Amyloidosis (ATTR) With Cardiomyopathy
Study to Assess the Efficacy & Safety of KHK4951 in Patients With Diabetic Macular Edema
Recruiting
The purpose of this study is to evaluate efficacy and safety of KHK4951 eye drops in patients with DME.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/28/2025
Locations: Win Retina, Arcadia, California
Conditions: Diabetic Macular Edema (DME)
A Study of Adjuvant Cretostimogene Grenadenorepvec for Treatment of Intermediate Risk NMIBC Following TURBT
Recruiting
This is a Phase 3, open-label, randomized trial designed to evaluate the RFS of TURBT followed by cretostimogene grenadenorepvec versus TURBT followed by surveillance for the treatment of participants with IR-NMIBC.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/28/2025
Locations: Michael G. Oefelein MD Clinical Trials, Bakersfield, California
Conditions: Non Muscle Invasive Bladder Cancer, Urologic Cancer, Bladder Cancer, Urothelial Carcinoma
Study of Volrustomig in Women With High Risk Locally Advanced Cervical Cancer (eVOLVE-Cervical)
Recruiting
This is a phase III, randomized, double-blind, placebo-controlled, multi-center, global study to explore the efficacy and safety of volrustomig in women with high-risk LACC (FIGO 2018 stage IIIA to IVA cervical cancer) who have not progressed following platinum-based CCRT.
Gender:
FEMALE
Ages:
15 years and above
Trial Updated:
07/28/2025
Locations: Research Site, La Jolla, California
Conditions: Locally Advanced Cervical Cancer
A Study to Evaluate the Effect of Budesonide, Glycopyrronium, Formoterol Fumarate (BGF) Metered Dose Inhaler (MDI), Budesonide and Formoterol Fumarate (BFF) MDI and Placebo MDI on Exercise Parameters in Participants With Chronic Obstructive Pulmonary Disease (COPD).
Recruiting
This study will investigate the effect of Budesonide, Glycopyrronium, and Formoterol Fumarate (BGF) metered dose inhaler (MDI) compared with Placebo MDI, and Budesonide and Formoterol Fumarate (BFF) MDI on isotime inspiratory capacity (IC) and exercise endurance time.
Gender:
ALL
Ages:
Between 40 years and 80 years
Trial Updated:
07/28/2025
Locations: Research Site, Los Angeles, California
Conditions: Chronic Obstructive Pulmonary Disease
Intratumoral PH-762 for Cutaneous Carcinoma
Recruiting
The goal of this clinical trial is to evaluate the safety and tolerability of intratumoral injections of PH-762 in squamous cell carcinoma, melanoma, or Merkel cell carcinomas of the skin, to understand what the body does to the PH-762, and to observe how the tumor responds to the drug. Participants will receive four injections of PH-762 at weekly intervals, into a single tumor, followed by surgical removal of the tumor approximately two weeks later.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/28/2025
Locations: Paradigm Clinical Research, San Diego, California
Conditions: Squamous Cell Carcinoma of the Skin, Malignant Melanoma of Skin, Merkel Cell Carcinoma of Skin
A Study to Investigate Efficacy, Safety, and Tolerability of Remibrutinib Compared With Placebo in Adults With CINDU Inadequately Controlled by H1-antihistamines
Recruiting
This is a Phase 3, parallel group, placebo-controlled, double-blind, confirmatory study in patients with CINDU, with an optional Open-label Extension (OLE).
The purpose of the core period (52 weeks of treatment) of this study is to evaluate the efficacy, safety, and tolerability of remibrutinib (LOU064) vs. placebo in adults suffering from CINDU inadequately controlled by H1-antihistamines (H1-AHs).
The purpose of the OLE period is to collect long-term efficacy, safety, and tolerability data o... Read More
Gender:
ALL
Ages:
Between 18 years and 100 years
Trial Updated:
07/28/2025
Locations: Kern Research, Bakersfield, California
Conditions: Chronic Inducible Urticaria
Study of GalaFLEX LITE™ Scaffold in Treatment of Capsular Contracture After Breast Implant Augmentation
Recruiting
Prospective, randomized, controlled study to assess the safety and effectiveness of GalaFLEX LITE™ Scaffold in revision surgery for reduction of capsular contracture recurrence and/or malposition in implant-based breast augmentation patients versus patients undergoing conventional revision surgery with no supportive matrix or acellular dermal matrix (ADM). Subjects will be randomized 2:1 to receive either GalaFLEX LITE™ Scaffold or standard care (no ADM or matrix placement). This study is design... Read More
Gender:
FEMALE
Ages:
Between 22 years and 66 years
Trial Updated:
07/28/2025
Locations: The Practice Plastic Surgery, Beverly Hills, California
Conditions: Capsular Contracture Associated With Breast Implant, Capsular Contracture Grade III, Capsular Contracture Grade IV
The PROTEMBO Trial
Recruiting
The goal of this prospective, multi-center, randomized, controlled study is to compare the safety and efficacy of the ProtEmbo Cerebral Embolic Protection device to a hybrid control (no embolic protection device ('No Device') and the Sentinel device) in subjects with severe symptomatic native aortic valve stenosis indicated undergoing a TAVR procedure.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/28/2025
Locations: Cedars-Sinai Medical Center, Los Angeles, California
Conditions: Severe Aortic Valve Stenosis
A Study Evaluating the Effectiveness and Safety of Risdiplam Administered in Pediatric Patients With Spinal Muscular Atrophy Who Experienced a Plateau or Decline in Function After Gene Therapy
Recruiting
This is an open-label, single-arm, multicenter clinical study to evaluate the effectiveness and safety of risdiplam administered in pediatric participants with SMA and 2 SMN2 copies who previously received onasemnogene abeparvovec and experience a plateau or decline in function. Participants to be enrolled are children \<2 years of age genetically diagnosed with SMA.
Gender:
ALL
Ages:
Between 3 months and 24 months
Trial Updated:
07/28/2025
Locations: Valley Children's Hospital, Madera, California
Conditions: Muscular Atrophy, Spinal
1417 - 1428 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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