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California Paid Clinical Trials
A listing of 5599 clinical trials in California actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
1969 - 1980 of 5599
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California is currently home to 5599 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.
Featured Offer
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Recruiting
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GLP-1 medications are scientifically backed to help individuals achieve significant weight loss—on average, 15-20% of body weight within a year.
As a valued user, you’re eligible for $100 off your first program with code policy-lab-100.
Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
Testing if High Dose Radiation Only to the Sites of Brain Cancer Compared to Whole Brain Radiation That Avoids the Hippocampus is Better at Preventing Loss of Memory and Thinking Ability
Recruiting
This phase III trial compares the effect of stereotactic radiosurgery to standard of care memantine and whole brain radiation therapy that avoids the hippocampus (the memory zone of the brain) for the treatment of small cell lung cancer that has spread to the brain. Stereotactic radiosurgery is a specialized radiation therapy that delivers a single, high dose of radiation directly to the tumor and may cause less damage to normal tissue. Whole brain radiation therapy delivers a low dose of radiat... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/06/2025
Locations: Kaiser Permanente-Anaheim, Anaheim, California
Conditions: Metastatic Lung Small Cell Carcinoma, Metastatic Malignant Neoplasm in the Brain, Recurrent Lung Small Cell Carcinoma, Stage IV Lung Cancer AJCC v8
Evaluation of SPN-812 (Viloxazine Extended-release Capsule) in Preschool-age Children With ADHD
Recruiting
This study will evaluate the efficacy and safety of SPN-812 (viloxazine extended release) in children 4 to 5 years of age with ADHD.
Gender:
ALL
Ages:
Between 48 months and 69 months
Trial Updated:
05/06/2025
Locations: Advanced Research Center (ARC), Inc., Anaheim, California
Conditions: Attention-Deficit/Hyperactivity Disorder
Brentuximab Vedotin in Early Stage Hodgkin Lymphoma
Recruiting
RADAR is a multicentre, international, randomised, open-label phase III clinical trial composed of 2 trials running in parallel. Trial 1 will be led and sponsored by University College London (UCL) and conducted in Europe and Australia/New Zealand. Trial 2 will be led by the Canadian Cancer Trials Group (CCTG) and conducted in North America, with CCTG the regulatory sponsor in Canada, and University of Miami the regulatory sponsor and IND holder in the US. Datasets from Trial 1 and Trial 2 will... Read More
Gender:
ALL
Ages:
Between 16 years and 69 years
Trial Updated:
05/06/2025
Locations: Stanford University - (Stanford Cancer Institute), Stanford, California
Conditions: Hodgkin Lymphoma
Project Talk Trial: Engaging Underserved Communities in End-of-life Conversations
Recruiting
Compared to the general population, individuals from underserved communities are more likely to receive low quality end-of-life care and unwanted, costly and burdensome treatments due in part to a lack of advance care planning (ACP; the process of discussing wishes for end-of-life care with loved ones/clinicians and documenting them in advance directives).
This study will use existing, trusted, and respected social networks to evaluate two conversation-based tools intended to engage underserved... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/06/2025
Locations: Promotores y Promotoras, Santa Paula, California
Conditions: Advance Care Planning, Advance Directives, Terminal Illness, Chronic Illness, Communication
Two Studies for Patients With High Risk Prostate Cancer Testing Less Intense Treatment for Patients With a Low Gene Risk Score and Testing a More Intense Treatment for Patients With a High Gene Risk Score, The PREDICT-RT Trial
Recruiting
This phase III trial compares less intense hormone therapy and radiation therapy to usual hormone therapy and radiation therapy in treating patients with high risk prostate cancer and low gene risk score. This trial also compares more intense hormone therapy and radiation therapy to usual hormone therapy and radiation therapy in patients with high risk prostate cancer and high gene risk score. Apalutamide may help fight prostate cancer by blocking the use of androgen by the tumor cells. Radiatio... Read More
Gender:
MALE
Ages:
18 years and above
Trial Updated:
05/06/2025
Locations: Sutter Cancer Centers Radiation Oncology Services-Auburn, Auburn, California
Conditions: Prostate Adenocarcinoma, Stage III Prostate Cancer AJCC v8, Stage IVA Prostate Cancer AJCC v8
Testing the Addition of the Drug Apalutamide to the Usual Hormone Therapy and Radiation Therapy After Surgery for Prostate Cancer, INNOVATE Trial
Recruiting
This phase III trial studies whether adding apalutamide to the usual treatment improves outcome in patients with lymph node positive prostate cancer after surgery. Radiation therapy uses high energy x-ray to kill tumor cells and shrink tumors. Androgens, or male sex hormones, can cause the growth of prostate cancer cells. Drugs, such as apalutamide, may help stop or reduce the growth of prostate cancer cell growth by blocking the attachment of androgen to its receptors on cancer cells, a mechani... Read More
Gender:
MALE
Ages:
18 years and above
Trial Updated:
05/06/2025
Locations: Kaiser Permanente-Anaheim, Anaheim, California
Conditions: Prostate Adenocarcinoma, Stage I Prostate Cancer AJCC v8, Stage II Prostate Cancer AJCC v8, Stage III Prostate Cancer AJCC v8, Stage IVA Prostate Cancer AJCC v8
Prescreening Protocol to Enroll in Food Allergy Clinical Studies at a Single Site
Recruiting
This is a protocol for prescreening of participants who would like to be in clinical studies in our Center at Stanford.
Gender:
ALL
Ages:
Between 1 week and 90 years
Trial Updated:
05/06/2025
Locations: The Sean N. Parker Center for Allergy and Asthma Research, Stanford University, Palo Alto, California
Conditions: Food Allergy
A Novel Multiplex ELISA Assay for Evaluating Patients With Gross Hematuria for Bladder Cancer
Recruiting
To improve upon the non-invasive detection of BCa by further validating a multiplex ELISA assay directed at a BCa-associated diagnostic signature in voided urine samples of patients with gross hematuria.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/06/2025
Locations: Cedars-Sinai Medical Center, Los Angeles, California
Conditions: Bladder Cancer
Observation or Radiation Therapy in Treating Patients With Newly Diagnosed Grade II Meningioma That Has Been Completely Removed by Surgery
Recruiting
This randomized phase III trial studies how well radiation therapy works compared with observation in treating patients with newly diagnosed grade II meningioma that has been completely removed by surgery. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/06/2025
Locations: Kaiser Permanente-Anaheim, Anaheim, California
Conditions: Intracranial Meningioma, Grade 2 Meningioma
A Study to Investigate if Long Acting Cabotegravir (CAB) and Lenacapavir (LEN) Injections Are Tolerable and Acceptable When Administered to Healthy Adults Without HIV
Recruiting
This study will evaluate the tolerability and acceptability of injection site reactions (ISRs) of two long-acting (LA) injectables. Additional characteristics of the ISRs will be investigated and described as well as safety outcomes.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/05/2025
Locations: GSK Investigational Site, Long Beach, California
Conditions: HIV Infections
A Study of 2 Doses of Ritlecitinib in People 12 Years of Age and Older With Alopecia Areata
Recruiting
The purpose of the study is to learn about the safety and effects of the study medicine (called ritlecitinib) for the treatment of alopecia areata. Alopecia areata is a disease that causes hair loss on the scalp, face, and areas of the body.
Ritlecitinib is approved in many countries at a dose of 50 mg (milligram) taken by mouth once a day for the treatment of patients 12 years and older with severe alopecia areata. This study will look at both the 50 mg dose and a 100 mg dose.
This study is s... Read More
Gender:
ALL
Ages:
12 years and above
Trial Updated:
05/05/2025
Locations: Southern California Clinical Research, Santa Ana, California
Conditions: Alopecia Areata
Using Clinical Decision Support to Provide Social Risk-Informed Care for Opioid Use Disorder in the Emergency Department
Recruiting
The overarching goal of this proposal is to integrate patient social risk information into an existing electronic health record (EHR)-based clinical decision support (CDS) tool (CDSv1) to facilitate emergency department (ED)-initiated, social risk-informed opioid use disorder (OUD) medication treatment and ultimately improve treatment adherence and follow up. The investigators will evaluate the feasibility and acceptability of the social care-enhanced CDS tool, CDSv2, (compared to CDSv1) at a si... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/05/2025
Locations: University of California, San Francisco, San Francisco, California
Conditions: Opioid Use Disorder, Social Determinants of Health (SDOH)
1969 - 1980 of 5599
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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