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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.
937 - 948 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
CRS Questionnaire Validation Project
Recruiting
The 'CRS validation project' consists of a joint effort of 32 medical centers in Europe, the USA, and South Africa to carry out the validation of 2 novel questionnaires designated to measure self-perceived severity and control of Chronic Rhinosinusitis (with or without nasal polyps).
This study will validate translated versions of the same set of questionnaires simultaneously in the centers involved after recruiting a total of 1000 patients, while data collection, statistical analysis, and crea... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/06/2025
Locations: UCLA Santa Monica Medical Center, Santa Monica, California
Conditions: Chronic Rhinosinusitis (CRS) With and Without Nasal Polyps
Study of BLU-808 in Chronic Inducible Urticaria (CIndU) and Chronic Spontaneous Urticaria (CSU)
Recruiting
This is a 2-part, proof-of-concept study to be conducted globally, designed to evaluate the safety, tolerability, clinical activity, pharmacokinetics, and pharmacodynamics of BLU-808, a wild type KIT inhibitor, in participants with CIndU (Part A) or CSU (Part B).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/06/2025
Locations: Modena Allergy & Asthma Clinical Research - La Jolla, La Jolla, California
Conditions: Chronic Inducible Urticaria, Chronic Spontaneous Urticaria
TriClip CED RWE Study
Recruiting
This Coverage with Evidence Development (CED) study evaluates the long-term health outcomes of patients with symptomatic, severe or greater Tricuspid Regurgitation who received a Tricuspid Transcatheter Edge-to-Edge Repair (T-TEER) procedure using the TriClip system.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/06/2025
Locations: Abbott, Santa Clara, California
Conditions: Tricuspid Regurgitation
A Study of Eloralintide (LY3841136) and Eloralintide With Tirzepatide in Participants With Overweight or Obesity
Recruiting
The purpose of this study is to evaluate how well eloralintide and eloralintide with tirzepatide is tolerated and what side effects may occur in participants with overweight or obesity. The study drug will be administered subcutaneously (SC) (under the skin). Blood tests will be performed to check how much eloralintide and eloralintide with tirzepatide get into the bloodstream and how long it takes the body to eliminate it.
There will be 6 cohorts. The study will last up to approximately 26 wee... Read More
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
08/06/2025
Locations: Anaheim Clinical Trials, LLC, Anaheim, California
Conditions: Overweight, Obesity
An Open-Label Pilot Study of VTX2735 in Recurrent Pericarditis
Recruiting
This is a study to understand if taking VTX2735 is safe and effective in participants diagnosed with Recurrent Pericarditis (RP). Approximately 30 patients will take VTX2735.
The study consists of a 30-day Screening Period (to see if a participant qualifies for the study), a 6-week Open Label Treatment period (a participant receives active Dose A), a 7-week Extension Treatment period (a participant meets criteria for continuing and receives active Dose A) and a 14-day Follow-Up Period.
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
08/06/2025
Locations: Local Site #840014, Orange, California
Conditions: Recurrent Pericarditis
A Phase 3 Study to Assess the Efficacy, Safety, and Tolerability of Itepekimab (Anti-IL-33 mAb) in Participants With Inadequately-controlled Chronic Rhinosinusitis With Nasal Polyps
Recruiting
EFC18419 is a multinational, randomized, double-blind, placebo-controlled, parallel-group, Phase 3 study with 3 treatment groups. The purpose of the study is to evaluate the efficacy, safety and tolerability of 2 dosing regimens of itepekimab compared to placebo as add-on therapy to intranasal corticosteroids (INCS) in male and female participants with chronic rhinosinusitis with nasal polyps (CRSwNP) aged 18 years of age and older.
Study details include:
* The study duration per participant (... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/06/2025
Locations: One of a Kind CLinical Research Center- Site Number : 8400034, Napa, California
Conditions: Chronic Rhinosinusitis With Nasal Polyps
A Phase 3 Study to Assess the Efficacy, Safety, and Tolerability of Itepekimab (Anti-IL-33 mAb) in Participants With Inadequately-controlled Chronic Rhinosinusitis With Nasal Polyps
Recruiting
EFC18418 is a multinational, randomized, double-blind, placebo-controlled, parallel-group, Phase 3 study with 3 treatment groups. The purpose of the study is to evaluate the efficacy, safety and tolerability of 2 dosing regimens of itepekimab compared to placebo as add-on therapy to intranasal corticosteroids (INCS) in male and female participants with chronic rhinosinusitis with nasal polyps (CRSwNP) aged 18 years of age and older.
Study details include:
* The study duration per participant (... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/06/2025
Locations: Sensa Health- Site Number : 8400038, Los Angeles, California
Conditions: Chronic Rhinosinusitis With Nasal Polyps
A Study to Assess Adverse Events and Effectiveness of Gel Stent (XEN63) Implantation Using Ab Interno and Ab Externo Approaches in Adult Participants With Glaucoma
Recruiting
Glaucoma is the second most common cause of blindness in the world, second only to cataracts. This study will assess how safe and effective a glaucoma gel stent is when implanted using the ab interno (inside the eye) and ab externo (outside the eye) approach. Adverse events and intraocular pressure will be assessed.
XEN63 is an investigational device for the treatment of intraocular pressure (IOP) in patients with glaucoma when both medical and conventional surgical treatments have failed (for... Read More
Gender:
ALL
Ages:
45 years and above
Trial Updated:
08/06/2025
Locations: LA Glaucoma Group /ID# 268444, Culver City, California
Conditions: Primary Open Angle Glaucoma
A Phase 1b Study of the NLRP3 Inhibitor VENT-02 in Patients With Mild to Moderate Parkinson's Disease
Recruiting
This trial is a randomized, double-blind, placebo-controlled Phase 1b study evaluating the safety/tolerability, PK, and pharmacodynamics of VENT 02, administered orally at 1 dose level twice daily (BID) over 28 days in patients with mild to moderate Parkinson's disease.
The study includes a screening period, a 28-day double-blind treatment period, and a 7-day follow-up period after last dose.
Approximately 30 patients will be randomized into 1 of the 2 treatment arms.
Gender:
ALL
Ages:
Between 45 years and 90 years
Trial Updated:
08/06/2025
Locations: Investigative Site, Fountain Valley, California
Conditions: Parkinson Disease
A Study to Determine the Efficacy, Safety, and Durability of Faricimab in Participants With Neovascular Age-Related Macular Degeneration
Recruiting
This study is a Phase IIIb/IV, multicenter, randomized, two-arm, open-label 100-week study to investigate the efficacy, safety, and durability of intravitreal 6-mg faricimab administered at up to 24-week intervals in patients with neovascular age-related macular degeneration (nAMD) that are treatment-naïve in the study eye.
Gender:
ALL
Ages:
50 years and above
Trial Updated:
08/06/2025
Locations: Retinal Diagnostic Center, Campbell, California
Conditions: Neovascular Age-related Macular Degeneration (nAMD)
A Phase 2a Multicenter Clinical Trial of TB006 in Participants With Parkinson's Disease
Recruiting
The primary objectives of this study are to assess the efficacy of TB006 in improving motor function and to assess the safety of TB006 in participants with Parkinson's Disease (PD).
Gender:
ALL
Ages:
Between 50 years and 80 years
Trial Updated:
08/06/2025
Locations: Parkinson's Research Centers of America - Orange County, Aliso Viejo, California
Conditions: Parkinson's Disease (PD)
BMS-986489 (Atigotatug + Nivolumab) vs Durvalumab in Limited-stage Small-cell Lung Cancer (TIGOS-LS)
Recruiting
This is an open-label, randomized study of BMS-986489 (atigotatug + nivolumab fixed-dose combination) vs durvalumab in limited-stage (LS)-small-cell lung cancer (SCLC) participants.
The main goals of this study are to:
* Evaluate the efficacy of BMS-986489 vs durvalumab
* Evaluate the safety profile of BMS-986489
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/06/2025
Locations: Sansum Clinic, Santa Barbara, California
Conditions: Limited Stage Small Cell Lung Cancer
937 - 948 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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