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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.
2509 - 2520 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. Donāt 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:
ā¢Are between 18-65
ā¢Have been experiencing a major depressive episode for at least a month
Qualifying participants:
ā¢Are between 18-65
ā¢Have been experiencing a major depressive episode for at least a month
Conditions:
Depression
Major Depressive Disorder
Depressive Disorder
Depressive Symptoms
Depressive Disorder
Evaluation of Pharmacokinetics, Pharmacodynamics, Efficacy, Safety, and Immunogenicity of Ravulizumab Administered Intravenously in Pediatric Participants With Generalized Myasthenia Gravis (gMG)
Recruiting
The primary purpose of this study is to characterize the pharmacokinetics and pharmacodynamics of treatment with ravulizumab intravenous infusion in pediatric participants with gMG.
Gender:
ALL
Ages:
All
Trial Updated:
06/11/2025
Locations: Research Site, Los Angeles, California
Conditions: Generalized Myasthenia Gravis, gMG
Study to Evaluate Sotatercept (MK-7962) in Children With Pulmonary Arterial Hypertension (PAH) (MK-7962-008)
Recruiting
The primary objectives of the study are to evaluate the safety and tolerability, and pharmacokinetics (PK) of sotatercept over 24 weeks of treatment in children ā„1 to \<18 years of age with PAH World Health Organization (WHO) Group 1 on standard of care (SoC). There is no formal hypothesis.
Gender:
ALL
Ages:
Between 1 year and 17 years
Trial Updated:
06/11/2025
Locations: The Regents of the University of California - Los Angeles (UCLA Pediatrics) ( Site 1606), Los Angeles, California
Conditions: Pulmonary Arterial Hypertension
Dynamic Versus Static Night Splinting of Plantar Fasciitis
Recruiting
The investigators are trying to study that there is no difference in improvement of motion between static progressive and dynamic splinting.
Gender:
ALL
Ages:
Between 18 years and 99 years
Trial Updated:
06/11/2025
Locations: Stanford University School of Medicine, Palo Alto, California
Conditions: Plantar Fascitis
A Study of CF33-hNIS (VAXINIA), an Oncolytic Virus, as Monotherapy or in Combination With Pembrolizumab in Adults With Metastatic or Advanced Solid Tumors
Recruiting
This is an open-label, dose-escalation, multi-center phase I study evaluating the safety of CF33-hNIS (hNIS - human sodium iodide symporter) administered via two routes of administration, intratumoral (IT) or intravenous (IV), either as a monotherapy or in combination with pembrolizumab or mFOLFOX in patients with metastatic or advanced solid tumors.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/11/2025
Locations: City of Hope Medical Center, Duarte, California
Conditions: Solid Tumor, Solid Carcinoma, Solid Tumor, Adult, Metastatic Cancer, Advanced Solid Tumor, Cholangiocarcinoma, Bile Duct Cancer
Oral Hymecromone to Treat Adolescents and Adults With Primary Sclerosing Cholangitis.
Recruiting
Primary objective: To evaluate the efficacy of hymecromone plus standard of care compared with standard of care alone in the treatment of adolescents and adults with primary sclerosing cholangitis (PSC).
Secondary objectives: To evaluate the change in Alkaline Phosphatase (ALP) from baseline to 6 months post-treatment following treatment with hymecromone plus standard of care compared with standard of care.
To evaluate changes in biomarkers of PSC disease during hymecromone treatment, namely:... Read More
Gender:
ALL
Ages:
Between 14 years and 75 years
Trial Updated:
06/11/2025
Locations: Stanford Clinic, Redwood City, California
Conditions: Primary Sclerosing Cholangitis
A Study of E7386 in Combination With Other Anticancer Drug(s) in Participants With Solid Tumor
Recruiting
The primary objective of this study is to assess the safety and tolerability and to determine the recommended Phase 2 dose (RP2D) of E7386 in combination with other anticancer drug(s), and to determine the optimal dose of E7386 in combination with lenvatinib in endometrial carcinoma (EC) (for EC Dose Optimization Part only).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/11/2025
Locations: University of California San Diego (UCSD) - Moores Cancer Center(All), La Jolla, California
Conditions: Neoplasms, Carcinoma, Hepatocellular, Liver Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms
Vertical Sleeve Gastrectomy and Lifestyle Modification for the Treatment of Non-Alcoholic Steatohepatitis
Recruiting
Participants meeting study entry criteria are randomized with equal probability to one of two study groups: (1) Lifestyle modification or (2) Vertical Sleeve Gastrectomy (VSG) with Iifestyle modification, followed for 12 months. The primary goal for the trial is to determine if the investigators can recruit, randomize, and retain participants to perform invasive and non-invasive measurements of NASH and fibrosis, deliver lifestyle modification and demonstrate the safety of VSG. The investigators... Read More
Gender:
ALL
Ages:
Between 30 years and 70 years
Trial Updated:
06/11/2025
Locations: University of San Fransisco, San Francisco, California
Conditions: NASH - Nonalcoholic Steatohepatitis
A Research Study to Look at How Well CagriSema Helps People Living With Obesity Lose Weight and Maintain Weight Loss in the Long-term
Recruiting
This study will look at how well CagriSema helps people living with obesity to lose weight and maintain the weight loss long-term. The study has 2 parts: The first part is called 'the main study' and the second part is called 'the extension study'. In the main study participants will either get CagriSema (a study medicine) or placebo (a dummy medicine that looks like CagriSema but has no active ingredient). Which treatment participants get is decided by chance. Participants are two times more li... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/10/2025
Locations: FDRC, Costa Mesa, California
Conditions: Obesity
RECLAIM STUDY: A Phase 2 Evaluating the Efficacy and Safety of Pemvidutide in the Treatment of Alcohol Use Disorder (AUD) in Subjects With Obesity or Overweight
Recruiting
This is a Phase 2, multicenter, randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of pemvidutide in the treatment of AUD in subjects with obesity or overweight. After signing the informed consent form, subjects will be screened and if eligible randomized 1:1 to 1 of the following 2 treatment arms:
* Pemvidutide: 2.4 mg SC once weekly
* Placebo: Placebo SC once weekly
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
06/10/2025
Locations: Altimmune Clinical Study Site, Los Angeles, California
Conditions: Alcohol Use Disorder (AUD)
Evaluate Efficacy and Safety of PA5108 Ocular Implants in Primary Open Angle Glaucoma or Ocular Hypertension
Recruiting
The goal of this clinical trial is to determine the dose of PA5108 Ocular Implant that is effective and safe for the reduction of intraocular pressure in adult patients with open-angle glaucoma or ocular hypertension, compared to the standard treatment therapy.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/10/2025
Locations: Eye Research Foundation, Newport Beach, California
Conditions: Glaucoma, Open-Angle, Ocular Hypertension
Empathy Through Pain Control: Lidocaine Paracervical Block for IUD Placements
Recruiting
The goal of this research study is to learn more about how different uses of a numbing medication might affect pain levels while getting an IUD placed. The investigators are also studying participants opinions of their clinicians' empathy.
The investigators are inviting patients who arrive at their clinic visit seeking an IUD.
Usually, at University of California, San Diego (UCSD), for patients who have never delivered a baby, clinicians use a buffered paracervical block for before IUD placeme... Read More
Gender:
FEMALE
Ages:
Between 18 years and 50 years
Trial Updated:
06/10/2025
Locations: University of California, San Diego, La Jolla, California
Conditions: Contraception, Pain, Acute, Anesthesia, Local
OmnipodĀ® SmartAdjust 2.0 System Compared to the OmnipodĀ® 5 System in Individuals With Type 1 or Type 2 Diabetes
Recruiting
The goal of this multi-center, randomized, cross-over study is to evaluate the safety and effectiveness of the Omnipod 5 SmartAdjust 2.0 System in individuals with type 1 or type 2 diabetes.
Study participants will complete about 5 in-person visits and be expected to treat their diabetes per their usual routine using the system at the lowest available target setting.
Each participant will begin the study using either the Omnipod 5 SmartAdjust 2.0 System or the Omnipod 5 System for 4 weeks (Per... Read More
Gender:
ALL
Ages:
Between 2 years and 70 years
Trial Updated:
06/10/2025
Locations: University of Southern California, Los Angeles, California
Conditions: Diabetes Mellitus, Type 1, Type 2
2509 - 2520 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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