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California Paid Clinical Trials
A listing of 5585 clinical trials in California actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
1189 - 1200 of 5585
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California is currently home to 5585 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 Mevidalen (LY3154207) in Participants With Alzheimer's Disease
Recruiting
The main purpose of this study is to look at how safe the study drug (mevidalen) is and whether it works to alleviate symptoms when given to people with mild to moderate Alzheimer Disease (AD) dementia. This is done by looking at participants: thinking and memory (cognition), everyday activities and sleep, AD symptoms, physical activity, irritability or anxiety. The study is expected to last approximately 26 weeks and may include up to 14 visits.
Gender:
ALL
Ages:
Between 50 years and 80 years
Trial Updated:
05/23/2025
Locations: Profound Research, LLC, Carlsbad, California
Conditions: Alzheimer Disease
A Study Evaluating Efruxifermin in Subjects With Compensated Cirrhosis Due to NASH/MASH
Recruiting
This is a multi-center evaluation of efruxifermin (EFX) in a randomized, double-blind, placebo-controlled study in subjects with compensated cirrhosis due to NASH/MASH.
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
05/23/2025
Locations: Akero Clinical Study Site, Coronado, California
Conditions: NASH - Nonalcoholic Steatohepatitis, MASH - Metabolic Dysfunction-Associated Steatohepatitis
A Phase 3 Study to Evaluate Petosemtamab Plus Pembrolizumab vs Pembrolizumab in First-line Treatment of Head and Neck Cancer (LiGeR - HN1)
Recruiting
This is a Phase 3 randomized, open-label study to evaluate the efficacy and safety of petosemtamab plus pembrolizumab vs pembrolizumab in first-line treatment of recurrent or metastatic PD-L1+ head and neck squamous cell carcinoma.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/23/2025
Locations: Site 36, La Jolla, California
Conditions: Head and Neck Squamous Cell Carcinoma
Phase 3 Study of T-DXd and Rilvegostomig Versus SoC in Advanced HER2-expressing Biliary Tract Cancer
Recruiting
The purpose of this study is to measure the efficacy and safety of T-DXd with rilvegostomig or T-DXd monotherapy compared with gemcitabine plus cisplatin and durvalumab in patients with advanced treatment naïve HER2-expressing BTC.
Gender:
ALL
Ages:
Between 18 years and 99 years
Trial Updated:
05/23/2025
Locations: Research Site, Fullerton, California
Conditions: Biliary Tract Cancer
A Study to Investigate the Efficacy and Safety of Anifrolumab Administered as Subcutaneous Injection and Added to Standard of Care Compared With Placebo Added to Standard of Care in Adult Participants With Idiopathic Inflammatory Myopathies (Polymyositis and Dermatomyositis)
Recruiting
The purpose of this multicenter, randomized, placebo-controlled and double-blind study is to evaluate the efficacy and safety of subcutaneous anifrolumab compared with placebo on the overall disease activity in participants with moderate to severe Idiopathic Inflammatory Myopathies (IIM) \[polymyositis (PM) or dermatomyositis (DM)\] while receiving standard of care (SoC) treatment.
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
05/23/2025
Locations: Research Site, Irvine, California
Conditions: Polymyositis, Dermatomyositis
A Study Describing the Efficacy and Safety of Belimumab Administered in Adult Participants With Early Systemic Lupus Erythematosus (SLE)
Recruiting
This is a prospective, open-label, single arm 3-year clinical study to describe the short-term and long-term efficacy and safety of belimumab in participants with autoantibody positive early SLE with ongoing disease activity despite stable initial SLE therapy.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/23/2025
Locations: GSK Investigational Site, Covina, California
Conditions: Systemic Lupus Erythematosus
A Study of Lebrikizumab (LY3650150) in Adult Participants With Chronic Rhinosinusitis and Nasal Polyps Treated With Intranasal Corticosteroids (CONTRAST-NP)
Recruiting
The main purpose of this study is to evaluate the efficacy and safety of lebrikizumab in adult participants with chronic rhinosinusitis and nasal polyps treated with intranasal corticosteroids. The study will last about 18 months.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/23/2025
Locations: Keck Medicine of USC, Arcadia, California
Conditions: Chronic Rhinosinusitis With Nasal Polyps (CRSwNP)
Effect of Retatrutide Compared With Placebo in Participants With Type 2 Diabetes and Moderate or Severe Renal Impairment, With Inadequate Glycemic Control on Basal Insulin, With or Without Metformin and/or SGLT2 Inhibitor (TRANSCEND-T2D-3)
Recruiting
The purpose of this study is to investigate the efficacy and safety of retatrutide compared with placebo in participants with Type 2 Diabetes and renal impairment, with inadequate glycemic control on basal insulin alone or a combination of basal insulin with or without metformin and/or sodium-glucose cotransporter-2 (SGLT2) inhibitor. The study will last about 14 months and may include up to 22 visits.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/23/2025
Locations: Kidney & Hypertension Center - Apple Valley, Apple Valley, California
Conditions: Type 2 Diabetes
Study of Ravulizumab in Immunoglobulin A Nephropathy (IgAN)
Recruiting
The primary objective of this study to evaluate efficacy of ravulizumab compared with placebo on proteinuria reduction and change in eGFR in adult participants with IgAN who are at risk of disease progression.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/23/2025
Locations: Research Site, Loma Linda, California
Conditions: Immunoglobulin A Nephropathy, IgAN
A Study Evaluating the Efficacy of Budesonide, Glycopyrronium and Formoterol Fumarate Metered Dosed Inhaler on Cardiopulmonary Outcomes in Chronic Obstructive Pulmonary Disease
Recruiting
This study will evaluate the effect of triple ICS/LAMA/LABA therapy with BGF MDI 320/14.4/9.6 μg on cardiopulmonary outcomes relative to LAMA/LABA therapy with GFF MDI 14.4/9.6 μg in a population with COPD and elevated cardiopulmonary risk.
Gender:
ALL
Ages:
Between 40 years and 80 years
Trial Updated:
05/23/2025
Locations: Research Site, Apple Valley, California
Conditions: COPD (Chronic Obstructive Pulmonary Disease)
A Study of Guselkumab in Pediatric Participants With Moderately to Severely Active Ulcerative Colitis
Recruiting
The purpose of this study is to evaluate the efficacy of guselkumab in pediatric participants with moderately to severely active ulcerative colitis at the end of maintenance therapy among participants who were induction responders.
Gender:
ALL
Ages:
Between 2 years and 17 years
Trial Updated:
05/23/2025
Locations: Children's Hospital Oakland, Oakland, California
Conditions: Colitis, Ulcerative
Study of RAS(ON) Inhibitor Combinations in Patients With Advanced RAS-mutated NSCLC
Recruiting
The purpose of this platform study is to evaluate the safety, tolerability, pharmacokinetics (PK), and preliminary antitumor activity of novel RAS(ON) inhibitors combined with Standard(s) of Care (SOC) or with each other.
The first three subprotocols include the following:
Subprotocol A: RMC-6291 +/- RMC-6236 + SOC Subprotocol B: RMC-6236 + SOC Subprotocol C: RMC-9805 +/- RMC-6236 + SOC
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/23/2025
Locations: City of Hope - Duarte, Duarte, California
Conditions: Non-Small Cell Lung Cancer, NSCLC, KRAS, NRAS, HRAS-mutated NSCLC, KRAS G12C-mutated Solid Tumors, Lung Cancer, Lung Cancer Stage IV, Advanced Solid Tumor, Cancer, RAS G12D-mutated NSCLC
1189 - 1200 of 5585
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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