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                    Parkinson's Disease Paid Clinical Trials in California
A listing of 39  Parkinson's Disease  clinical trials  in California  actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
            1 - 12 of 39
        
                The state of California currently has 39 active clinical trials seeking participants for Parkinson's Disease research studies. These trials are conducted in various cities, including Los Angeles, San Francisco, San Diego and Sacramento. 
            
                                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 Offer
                
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        Recruiting
            
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                            Conditions: 
                                    
        
            
                        Overweight
                    
                                    
                        Overweight and Obesity
                    
                                    
                        Obesity
                    
                                    
                        Weight Loss
                    
                                    
                        Morbid Obesity
                    
                                    Featured Trial
                
                Stroke Clinical Study
            
        Recruiting
            
        A clinical study for people that suffer with Stroke
    
    
                            Conditions: 
                                    
        
            
                        Stroke
                    
                                    Featured Trial
                
                Chronic Kidney Disease (CKD) Clinical Study
            
        Recruiting
            
        A clinical study for people that suffer with Chronic Kidney Disease (CKD)
    
    
                            Conditions: 
                                    
        
            
                        Chronic Kidney Disease (CKD)
                    
                                    Featured Trial
                
                Ischemic heart disease (IHD) Clinical Study
            
        Recruiting
            
        A clinical study for people that suffer with Ischemic heart disease (IHD)
    
    
                            Conditions: 
                                    
        
            
                        Ischemic heart disease (IHD)
                    
                                    Featured Trial
                
                Cardiovascular Disease Clinical Study
            
        Recruiting
            
        A clinical study for people that suffer with Cardiovascular Disease
    
    
                            Conditions: 
                                    
        
            
                        Cardiovascular Disease
                    
                                    
                
                                    A Study of CREXONT (Carbidopa and Levodopa) Extended-Release Capsules in Participants With Parkinson's Disease
                                
            
            
        Recruiting
                            
            
                The primary purpose of this study is to evaluate efficacy and safety of CREXONT under real world conditions in participants with Parkinson disease (PD).             
        
        
    Gender:
                ALL
            Ages:
                18 years and above
            Trial Updated:
                08/22/2025
            
            Locations: Parkinson's Research Centers of America - Orange County, Aliso Viejo, California  +1 locations         
        
        
            Conditions: Parkinson Disease
        
            
        
    
                
                                    A Phase 2 Study of NEU-411 in Companion Diagnostic-Positive Participants With Early Parkinson's Disease
                                
            
            
        Recruiting
                            
            
                The goal of this Phase 2 clinical trial is to investigate the efficacy and safety of NEU-411 in men and women aged 40-80 years with early Parkinson's Disease (PD) who have predicted elevations in the activity of the "leucine-rich repeat kinase 2" ("LRRK2" for short) pathway based on their genetic profile. A DNA test will be used to identify the "LRRK2-driven" population with predicted elevation in the LRRK2 pathway.
Participants will:
• Take NEU-411 or placebo every day for 52 weeks             
        
        
    Gender:
                ALL
            Ages:
                Between 40 years and 80 years
            Trial Updated:
                08/18/2025
            
            Locations: Neuro-Pain Medical Center, Fresno, California  +4 locations         
        
        
            Conditions: Parkinson Disease, Parkinson, Idiopathic Parkinson Disease, Early Parkinson Disease (Early PD), Parkinson Disease, Idiopathic
        
            
        
    
                
                                    Real-World Study of ABBV-951 Subcutaneous Infusion to Assess Change in Disease Activity in Adult Participants With Parkinson's Disease
                                
            
            
        Recruiting
                            
            
                Parkinson's disease (PD) is a neurological condition, which affects the brain. PD gets worse over time, but how quickly it progresses varies a lot from person to person. Some symptoms of PD are tremors, stiffness, and slowness of movement. The purpose of this study is to evaluate how effective ABBV-951 is in treating adult participants with advanced PD in real world setting.
ABBV-951 (foslevodopa/foscarbidopa) is an approved drug for the treatment of Parkinson's Disease. The main ROSSINI study...  Read More             
        
        
    Gender:
                ALL
            Ages:
                18 years and above
            Trial Updated:
                08/18/2025
            
            Locations: Parkinson's Research Centers of America - Palo Alto /ID# 264703, Palo Alto, California         
        
        
            Conditions: Parkinson's Disease (PD)
        
            
        
    
                
                                    Pimavanserin vs. Quetiapine for Treatment of Parkinson's Psychosis
                                
            
            
        Recruiting
                            
            
                Patients with Parkinson's disease (PD) sometimes experience symptoms affecting their movement, such as slowness, tremor, stiffness, and balance or walking problems. Many patients also have other symptoms not related to movement, called non-motor symptoms, which may affect one's mood or emotions, memory or thinking, or cause one to see or hear things that aren't real (hallucinations) or believe things that aren't true (delusions). Hallucinations or delusions, together called psychosis, occur in u...  Read More             
        
        
    Gender:
                ALL
            Ages:
                40 years and above
            Trial Updated:
                08/15/2025
            
            Locations: VA Loma Linda Healthcare System, Loma Linda, CA, Loma Linda, California  +3 locations         
        
        
            Conditions: Parkinson's Disease Psychosis
        
            
        
    
                
                                    Phase 1/2a Clinical Trial of PR001 (LY3884961) in Patients With Parkinson's Disease With at Least One GBA1 Mutation (PROPEL)
                                
            
            
        Recruiting
                            
            
                Study J3Z-MC-OJAA is a Phase 1/2a, multicenter, open-label, ascending dose, first in-human study that will evaluate the safety of intracisternal LY3884961 administration in patients with moderate to severe Parkinson's disease with at least 1 pathogenic GBA1 mutation. Two dose level cohorts of LY3884961 are planned (Dose Level 1 and Dose Level 2). The duration of the study is 5 years. During the first year, patients will be evaluated for the effect of LY3884961 on safety, tolerability, immunogeni...  Read More             
        
        
    Gender:
                ALL
            Ages:
                Between 35 years and 80 years
            Trial Updated:
                08/13/2025
            
            Locations: Esperanza Clinical, 25220 Hancock Avenue, Murrieta, California         
        
        
            Conditions: Parkinson Disease
        
            
        
    
                
                                    A Study of AAV2-GDNF in Adults With Moderate Parkinson's Disease (REGENERATE-PD)
                                
            
            
        Recruiting
                            
            
                The objective of this randomized, surgically controlled, double-blinded, Phase 2 study is to evaluate the safety and efficacy of AAV2-GDNF delivered to the putamen in subjects with moderate Parkinson's Disease.             
        
        
    Gender:
                ALL
            Ages:
                Between 45 years and 75 years
            Trial Updated:
                08/12/2025
            
            Locations: UCI Alpha Clinic (Neurology), Irvine, California  +4 locations         
        
        
            Conditions: Parkinson Disease
        
            
        
    
                
                                    Registry of Deep Brain Stimulation With the VERCISE™ System: Vercise DBS Registry
                                
            
            
        Recruiting
                            
            
                The purpose of this registry is to compile characteristics of world-wide outcomes for the use of Boston Scientific's commercially available Vercise DBS System in the treatment of Parkinson's disease.
The utilization of Image Guided Programming (IGP), and other commercially available programming features, used as planning tools for the programming of patients with Boston Scientific's Vercise DBS System are also evaluated.
Additionally, the utilization of the DBS Illumina 3D feature that may be...  Read More             
        
        
    Gender:
                ALL
            Ages:
                18 years and above
            Trial Updated:
                08/11/2025
            
            Locations: Neurology and Pain Specialty, Aliso Viejo, California         
        
        
            Conditions: Parkinson's Disease
        
            
        
    
                
                                    Deep Brain Stimulation (DBS) Retrospective Outcomes Study
                                
            
            
        Recruiting
                            
            
                The primary objective of this study is to characterize real-world clinical outcomes of Deep Brain Stimulation (DBS) using retrospective review of de-identified patient records.             
        
        
    Gender:
                ALL
            Ages:
                All
            Trial Updated:
                08/11/2025
            
            Locations: University of California, San Francisco, San Francisco, California         
        
        
            Conditions: Parkinson Disease, Essential Tremor, Dystonia
        
            
        
    
                
                                    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)
        
            
        
    
                
                                    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  +2 locations         
        
        
            Conditions: Parkinson Disease
        
            
        
    
                
                                    Quantification of Phosphorylated Alpha-synuclein in Cutaneous Biopsies as a Prospective Biomarker in Parkinson's Disease
                                
            
            
        Recruiting
                            
            
                This study aims to assess the levels of phosphorylated alpha-synuclein (P-SYN) in patients with Parkinson's disease and REM Behavior Disorder using a minimally invasive skin punch biopsy. It seeks to understand the natural progression of P-SYN deposition over time to explore the potential of P-SYN quantification as a biomarker for disease progression.             
        
        
    Gender:
                ALL
            Ages:
                Between 50 years and 100 years
            Trial Updated:
                08/04/2025
            
            Locations: Parkinson's Research Centers of America - Orange County, Aliso Viejo, California  +2 locations         
        
        
            Conditions: REM Behavior Disorder, Parkinson Disease
        
            
        
    
                
                                    Blood Pressure Effects on Cognition and Brain Blood Flow in PD
                                
            
            
        Recruiting
                            
            
                Parkinson's disease (PD) is the second most common neurodegenerative disorder worldwide. Besides causing symptoms that impair movement, PD also causes non-motor symptoms, such as problems thinking and orthostatic hypotension (OH), i.e., low blood pressure (BP) when standing. About one-third of people with PD have OH, which can cause sudden, temporary symptoms while upright, including lightheadedness, dizziness, and fainting. People with PD and OH can also experience problems thinking that happen...  Read More             
        
        
    Gender:
                ALL
            Ages:
                50 years and above
            Trial Updated:
                08/03/2025
            
            Locations: University of California San Diego, San Diego, California         
        
        
            Conditions: Parkinson Disease, Orthostatic Hypotension, Dysautonomia
        
            
        
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