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California Paid Clinical Trials
A listing of 5617 clinical trials in California actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
457 - 468 of 5617
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California is currently home to 5617 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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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
Phase 2, Efficacy and Safety Study of ACP-204 in Lewy Body Dementia Psychosis
Recruiting
Multicenter, randomized, 6-week, double-blind, placebo-controlled, parallel-group, Phase 2 study in subjects with LBDP.
Gender:
ALL
Ages:
Between 55 years and 84 years
Trial Updated:
07/16/2025
Locations: ATP Clinical Research Inc., Irvine, California
Conditions: Lewy Body Dementia Psychosis
Study With Phage for CF Subjects With Pseudomonas Lung Infection
Recruiting
The goal of this Phase 2b clinical trial is to see if nebulized phage (BX004) can treat chronic Pseudomonas aeruginosa (PsA) lung infection in CF subjects. The primary goal is to see if 8 weeks of twice daily BX004 can reduce the amount of PsA in the sputum compared to placebo (on top of background CF therapy).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/16/2025
Locations: Stanford University, Palo Alto, California
Conditions: Chronic Pseudomonas Aeruginosa Infection, Cystic Fibrosis (CF)
A Study to Investigate the Efficacy and Safety of SAR442970 in Adult Participants With Ulcerative Colitis
Recruiting
This is a phase 2b, randomized, double-blind, 3-arm study for the treatment of Ulcerative Colitis. The primary objective of this study is to assess the efficacy of different doses of SAR442970 compared with placebo in participants with moderate to severe Ulcerative Colitis. The total study duration is up to 168 weeks, with a treatment period of up to 158 weeks including an open-label (OL) long-term extension (LTE) period of up to 104 weeks for eligible participants
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
07/16/2025
Locations: Gastro Care Institute - Site Number: 8400006, Lancaster, California
Conditions: Ulcerative Colitis
Comparative Effectiveness of Migraine Preventive Medications: The APT Comparison Study
Recruiting
This goal of this study is to compare three medications used for migraine preventive treatment.
This study will compare atogepant, a newer migraine preventive medication, with two older preventive medications, topiramate and propranolol. It will be determined if one works better and is more tolerable than the others.
Research participants will:
* Be randomly assigned to one of the three medications.
* Provide information about their migraine pattern using a daily headache diary and during res... Read More
Gender:
ALL
Ages:
Between 18 years and 70 years
Trial Updated:
07/16/2025
Locations: USC Keck, Los Angeles, California
Conditions: Migraine
Study to Evaluate the Efficacy and Safety of Ruxolitinib Cream in Participants With Hidradenitis Suppurativa (TRuE-HS1)
Recruiting
The purpose of this study is to evaluate the efficacy and safety of ruxolitinib cream in participants with hidradenitis suppurativa.
Gender:
ALL
Ages:
12 years and above
Trial Updated:
07/16/2025
Locations: Investigative Site US055, Chino, California
Conditions: Hidradenitis Suppurativa
A Study to Investigate Efficacy and Safety of SAR442970 in Patients With Crohn's Disease
Recruiting
This is a phase 2b, randomized, double-blind, 3-arm study for the treatment of Crohn's disease. The primary objective of this study is to assess the efficacy of different doses of SAR442970 compared with placebo in participants with moderate to severe Crohn's disease. The total study duration is up to 168 weeks, with a treatment period of up to 158 weeks including an open-label (OL) long-term extension (LTE) period of up to 104 weeks for eligible participants
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
07/16/2025
Locations: Gastro Care Institute - Site Number: 8400001, Lancaster, California
Conditions: Crohn's Disease
Study to Evaluate the Efficacy and Safety of Ruxolitinib Cream in Participants With Hidradenitis Suppurativa (TRuE-HS2)
Recruiting
The purpose of this study is to evaluate the efficacy and safety of ruxolitinib cream in participants with hidradenitis suppurativa.
Gender:
ALL
Ages:
12 years and above
Trial Updated:
07/16/2025
Locations: Investigative Site US262, Encino, California
Conditions: Hidradenitis Suppurativa
Comparison of New SUREcore Biopsy of Needle to Standard of Care During Transperineal Prostate Biopsies
Recruiting
To study a novel biopsy needle system for performing transperineal prostate biopsy. Prostate biopsy remains the standard approach for prostate cancer detection. While pre-biopsy MRI allows for targeting of visible lesions, systemic or 'off target' samples are recommended due to the well-recognized risk of undegrading and under sampling with current commercially available needles. The SureCore plus single-use biopsy needle produces a more intact tissue core with a same caliber 18g needle with \~2... Read More
Gender:
MALE
Ages:
18 years and above
Trial Updated:
07/16/2025
Locations: UC Davis Departments of Urologic Oncology, Sacramento, California
Conditions: Prostate Cancer
A Study to Evaluate the Efficacy and Safety of CIN-102 (Deudomperidone) in Adult Subjects With Idiopathic Gastroparesis.
Recruiting
The goal of this clinical trial is to evaluate if the study drug CIN-102 (deudomperidone) can help to decrease nausea severity associated with idiopathic gastroparesis severity in adult subjects.
The main questions it aims to answer are:
* To evaluate the efficacy of CIN-102 on symptoms of gastroparesis when given to patients with idiopathic gastroparesis compared to a placebo
* To evaluate the safety of CIN-102 when given to patients with idiopathic gastroparesis compared to a placebo
Partic... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/16/2025
Locations: Hope Clinical Research LLC, Canoga Park, California
Conditions: Idiopathic Gastroparesis
A Study to Evaluate INCB177054 in Participants With Select Advanced or Metastatic Solid Tumors
Recruiting
This study will be conducted to evaluate INCB177054 given as monotherapy or in combination with retifanlimab in participants with select advanced or metastatic solid Tumors.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/16/2025
Locations: The Angeles Clinic and Research Institute, Los Angeles, California
Conditions: Solid Tumors, Advanced Solid Tumors, Metastatic Solid Tumors
A Phase 3 Study of Revaccination in Subsequent Pregnancies With Bivalent RSV Vaccine and Duration of Protection of a Single Dose
Recruiting
This study aims to check how safe and well-tolerated a second dose of RSVpreF is when given during later pregnancies, and to see how long the immunity lasts from a single dose given during a previous pregnancy by examining the blood of nonpregnant participants who had the vaccine before.
Gender:
ALL
Ages:
0 years and above
Trial Updated:
07/16/2025
Locations: Lucile Packard Children's Hospital-Labor and Delivery Unit, Palo Alto, California
Conditions: RSV Infection
Efficacy and Safety of Maridebart Cafraglutide in Adult Participants With Type 2 Diabetes Mellitus Who Have Obesity or Are Overweight
Recruiting
The primary objective of this study is to demonstrate that maridebart cafraglutide is superior to placebo for percent change in body weight.
Gender:
ALL
Ages:
Between 18 years and 99 years
Trial Updated:
07/16/2025
Locations: San Fernando Valley Health Institute, Canoga Park, California
Conditions: Type 2 Diabetes Mellitus (T2DM), Obesity, Overweight
457 - 468 of 5617
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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