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California Paid Clinical Trials
A listing of 5588 clinical trials in California actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
865 - 876 of 5588
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California is currently home to 5588 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
Paid Clinical Studies Nationwide
Recruiting
Nationwide clinical trials offered in your area. Some trials offering up to several thousand dollars in compensation for participation.
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Recruiting
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Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
A Study of Efimosfermin Alfa in Participants With Biopsy-confirmed Cirrhosis (Compensated) MASH
Recruiting
The purpose of this study is to evaluate the safety, tolerability, preliminary efficacy, and pharmacokinetics (PK) of efimosfermin in participants with metabolic dysfunction associated steatohepatitis (MASH) and compensated cirrhosis consistent with stage F4 fibrosis.
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
06/18/2025
Locations: Fresno Clinical Research Center, Fresno, California
Conditions: Metabolic Dysfunction-Associated Steatohepatitis
A Study of Tirzepatide (LY3298176) Compared With Placebo in Adults With Type 1 Diabetes and Obesity or Overweight
Recruiting
The main purpose of this study is to find out how well and how safely tirzepatide works in adults who have type 1 diabetes and obesity or overweight. Participation in the study will last about 49 weeks.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: Sansum Diabetes Research Institute, Goleta, California
Conditions: Type 1 Diabetes, Obesity, Overweight
Photon Craniospinal Irradiation for the Treatment of Leptomeningeal Disease Secondary to Breast Cancer or Non-small Cell Lung Cancer
Recruiting
This phase II trial tests how well craniospinal irradiation (CSI) using photon volumetric modulated arc radiotherapy (VMAT) works in treating patients with breast cancer or non-small cell lung cancer (NSCLC) that has spread from the original (primary) tumor to the cerebrospinal fluid and meninges (thin layers of tissue that cover and protect the brain and spinal cord) (leptomeningeal disease). Radiation therapy uses high energy x-rays, particles, or radioactive seeds to kill cancer cells and shr... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: City of Hope Medical Center, Duarte, California
Conditions: Anatomic Stage IV Breast Cancer AJCC v8, Metastatic Breast Carcinoma, Metastatic Lung Non-Small Cell Carcinoma, Metastatic Malignant Neoplasm in the Leptomeninges, Stage IV Lung Cancer AJCC v8
A Study to Investigate Effectiveness of Tirzepatide Following Initiation of Ixekizumab in Participants With Active Psoriatic Arthritis and Overweight or Obesity in Clinical Practice (TOGETHER AMPLIFY-PsA)
Recruiting
The main purpose of this study is to assess the effectiveness of adding tirzepatide to ixekizumab therapy in standard clinical practice in participants with moderate-to-severe PsA and obesity or overweight with at least 1 weight-related comorbidity.
The study will last up to 12 months.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: Medvin Clinical Research - Apple Valley, Apple Valley, California
Conditions: Psoriatic Arthritis, Overweight or Obesity
A Study of Retatrutide (LY3437943) in the Maintenance of Weight Reduction in Individuals With Obesity
Recruiting
This is a study of retatrutide in participants with obesity. The main purpose is to learn more about how retatrutide maintains body weight loss. The study will have two treatment phases: an 80 week lead-in phase in which all participants will take retatrutide dose 1 and a 36 week randomized, double-blinded phase in which participants will either take retatrutide dose 1, retatrutide dose 2, or switch to placebo. Participation in the study will last around 125 weeks.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: Southern California Clinical Research, Santa Ana, California
Conditions: Obesity
A Study to Learn About How the Flu and COVID-19 Vaccines Act in Healthy People
Recruiting
The purpose of this study is to learn about how the flu and COVID vaccines act when given alone or when mixed together.
This study is seeking healthy participants aged 18 or older. All participants in this study will receive only 1 shot to their arm, either a flu or COVID vaccine, alone or mixed. Participants will take part in this study for about 6 months, and participants will need to visit the clinical study site at least 4 times.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: Anaheim Clinical Trials, LLC, Anaheim, California
Conditions: Influenza, COVID-19 (Coronavirus Disease 2019)
Vedolizumab Plus Post-transplant Cyclophosphamide and Short Course Tacrolimus for the Prevention of Graft Versus Host Disease in Patients Undergoing Allogeneic Hematopoietic Cell Transplantation After Reduced Intensity Conditioning
Recruiting
This phase II trial studies how well vedolizumab plus post-transplant cyclophosphamide (PTCy) and short course tacrolimus work for the prevention of graft versus host disease (GVHD) in patients undergoing allogeneic hematopoietic cell transplantation (HCT) after reduced intensity conditioning. Allogeneic HCT is a procedure in which a person receives blood-forming stem cells (cells from which all blood cells develop) from a donor. Giving reduced conditioning chemotherapy before an allogeneic HCT... Read More
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
06/18/2025
Locations: City of Hope Medical Center, Duarte, California
Conditions: Acute Lymphoblastic Leukemia, Acute Myeloid Leukemia, Chronic Myelomonocytic Leukemia, Graft Versus Host Disease, Myelodysplastic Syndrome, Myeloproliferative Neoplasm
DG1 Spectacle Lens for Myopia Progression Control in Children
Recruiting
The goal of this clinical trial is to evaluate the safety and efficacy of the DG1 spectacle lens for myopia progression control in children.
* To assess if the DG1 lens will slow the progression of myopia through an adjusted mean difference (e.g., age and baseline SER) of approximately 0.75D in cycloplegic spherical equivalent autorefraction refractive error compared to single-vision (SV) spectacles over the study period.
* To assess if DG1 lens will slow the progression of myopia through an ad... Read More
Gender:
ALL
Ages:
Between 7 years and 10 years
Trial Updated:
06/18/2025
Locations: Irvine Vision Center, Irvine, California
Conditions: Myopia
A Randomized Study of Azetukalner Versus Placebo in Major Depressive Disorder
Recruiting
X-NOVA2 is a Phase 3, multicenter, randomized, double-blind, placebo-controlled study to evaluate the clinical efficacy, safety, and tolerability of azetukalner as a monotherapy in adult participants diagnosed with Major Depressive Disorder (MDD)
Gender:
ALL
Ages:
Between 18 years and 74 years
Trial Updated:
06/18/2025
Locations: Behavioral Research Specialists, Llc, Glendale, California
Conditions: Major Depressive Disorder
SLV-154 Treatment of Metastatic Solid Tumors
Recruiting
This is a Phase 1 dose-escalation study evaluating the safety, pharmacokinetics, pharmacodynamics, immunogenicity, and efficacy of SLV-154 across a range of dose levels when administered to subjects with metastatic solid tumors.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: Hoag Memorial Hospital Presbyterian, Newport Beach, California
Conditions: Squamous Cell Cancer of Head and Neck (SCCHN), NSCLC, SCLC, Cervical Cancer Metastatic, Breast Cancer Metastatic, Endometrial Cancer, Ovarian Cancer, Urothelial Cancer, Sarcoma, Thyroid Cancer
Metformin for the Treatment of Insulin Resistance in Women With Stage I-III Breast Cancer Completing Chemotherapy
Recruiting
This phase III trial evaluates how often women develop insulin resistance and type-2 diabetes and compares metformin with usual care to usual care alone in treating insulin resistance in women with stage I-III breast cancer after chemotherapy. Insulin resistance occurs when cells stop responding to insulin and is a risk factor for developing diabetes and heart disease. Higher levels of insulin have been shown to be associated with aggressive breast cancer. Metformin hydrochloride decreases the a... Read More
Gender:
FEMALE
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: City of Hope Medical Center, Duarte, California
Conditions: Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Invasive Breast Carcinoma
Optimization of Beta-lactam Dosing in Critically Ill Patients With Cystatin C (OPTIMIZE-GNI)
Recruiting
The purpose of this study is to evaluate the abilities of Cystatin C (CysC) and CysC-based estimated Glomerular Filtration Rate (eGFR) equations to characterize the pharmacokinetics (PK) profiles of meropenem and cefepime relative to Serum Creatinine (SCR), Serum Creatinine based Equation (SCRE)and iohexol at the population and individual levels in critically ill adult patients with suspected or documented AMR Gram-negative infections. We hypothesize that CysC and CysC-based eGFR equations will... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/18/2025
Locations: Harbor UCLA Medical Center - Medicine - Infectious Diseases, Torrance, California
Conditions: Bacterial Infection
865 - 876 of 5588
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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