Search
California Paid Clinical Trials
A listing of 5602 clinical trials in California actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
553 - 564 of 5602
Match to Clinical Trials
Access to cutting-edge treatments
Latest clinical trials
Find trials in your area
Search by Name
Filter by Condition
Filter by Location
Filter by Age
Filter by Type
Gender
Type of Study
Clinical Trial Phase
Popular Cities
California is currently home to 5602 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
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 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.
Conditions:
Healthy
Healthy Volunteer Study
Featured Trial
Buy Retatrutide Online Through Celia
Recruiting
Retatrutide (formerly M25) is an investigational peptide being studied for its potential in supporting weight management and metabolic health. It acts on GLP-1, GIP, and glucagon receptors to influence appetite, energy regulation, and fat metabolism.
Conditions:
Healthy
Featured Offer
Lose Weight with GLP-1 Medications
Recruiting
Policy Lab has partnered with OnlineSemaglutide.org to offer trusted access to semaglutide and other GLP-1 medications, including generic alternatives to Ozempic® and Wegovy®.
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 $50 off your first program with code policy-lab-50.
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 $50 off your first program with code policy-lab-50.
Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
Featured Trial
Depression Clinical Trial
Recruiting
Join us in researching a potential investigational treatment for Depression. Reimbursement for study-related expenses may be available to you.
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Conditions:
Depression
Major Depressive Disorder
Depressive Disorder
Depressive Symptoms
Depressive Disorder
A Study to Learn About a Study Medicine Called Ibuzatrelvir in Adult and Adolescent Patients With COVID-19 Who Are Not Hospitalized But Are at Risk For Severe Disease
Recruiting
The purpose of the study is to evaluate whether ibuzatrelvir is effective and safe in adults and adolescents with COVID-19 who do not need to be in the hospital but who are at high risk for progression to severe disease. Eligible participants will be randomly assigned (by chance) to receive ibuzatrelvir or matching placebo orally for 5 days. Co-administration of locally available standard of care is allowed. The total duration of the study is around 6 months.
Gender:
ALL
Ages:
12 years and above
Trial Updated:
08/13/2025
Locations: National Institute of Clinical Research - Bakersfield, Bakersfield, California
Conditions: COVID-19 SARS-CoV-2 Infection
A Study of SPY002-091 in Healthy Volunteers
Recruiting
This is a Phase 1, randomized, double-blind, placebo-controlled, single- dose, first in human safety, tolerability, and pharmacokinetic study of SPY002-091 in healthy participants.
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
08/13/2025
Locations: Spyre Site 1, Cypress, California
Conditions: Healthy
A Study of Amivantamab and mFOLFOX6 or FOLFIRI Versus Cetuximab and mFOLFOX6 or FOLFIRI as First-line Treatment in Participants With KRAS/NRAS and BRAF Wild-type Unresectable or Metastatic Left-sided Colorectal Cancer
Recruiting
The purpose of this study is to compare how long the participants are disease-free (progression-free survival) when treated with amivantamab and chemotherapy with 5-fluorouracil, leucovorin calcium (folinic acid) or levoleucovorin, oxaliplatin (mFOLFOX6) or 5-fluorouracil, leucovorin calcium (folinic acid) or levoleucovorin, and irinotecan hydrochloride (FOLFIRI) versus cetuximab and mFOLFOX6 or FOLFIRI in adult participants with Kirsten rat sarcoma viral oncogene homolog (KRAS)/ Neuroblastoma R... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: CBCC Global Research, Bakersfield, California
Conditions: Colorectal Neoplasms
Targeting Aging With a Ketone Ester for Function in Frailty
Recruiting
This study aims to find out if a food supplement that contains a naturally occurring substance, ketones, can help to improve strength and general wellness in adults at, or over the age of 65 years who are experiencing a slight decline in their physical function.
Participation will involve a screening visit and 4 additional study visits over the course of 20 weeks. After being assessed for eligibility, study participants will be sorted into two groups at random and consume either a ketone or pla... Read More
Gender:
ALL
Ages:
65 years and above
Trial Updated:
08/13/2025
Locations: Buck Institute for Research on Aging, Novato, California
Conditions: Frail Elderly, Aging, Immune Function, Muscle Function
A Study to Learn About the Study Medicine Called Rimegepant in Women When Used for Intermittent Prevention of Menstrual Migraine
Recruiting
The purpose of this study is to evaluate the efficacy and safety of rimegepant when administered during the peri-menstrual period (PMP) for intermittent prevention of migraine in women who experience menstrual migraine attacks.
Gender:
FEMALE
Ages:
Between 18 years and 45 years
Trial Updated:
08/13/2025
Locations: Hope Clinical Research, Inc., Canoga Park, California
Conditions: Menstrual Migraine
A Trial to Test the Safety and Efficacy of TEV-53408 in Treating Vitiligo
Recruiting
The primary objective of the trial is to evaluate the safety of TEV-53408 administered subcutaneously for the treatment of adults with vitiligo.
A secondary objective is to further evaluate the safety of TEV-53408.
The planned study period per participant is 84 weeks including a screening period (up to 4 weeks), a 24-week open-label treatment period, a 16-week washout period, and a 40-week follow-up period.
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
08/13/2025
Locations: Teva Investigational Site 12044, Fremont, California
Conditions: Vitiligo
A Study of Pembrolizumab (MK-3475) With or Without Intismeran Autogene (V940) in Participants With Non-small Cell Lung Cancer (V940-009/INTerpath-009)
Recruiting
The goal of this study is to learn if people who receive intismeran autogene and pembrolizumab after surgery are cancer-free longer than people who receive placebo and pembrolizumab. Researchers want to know if giving intismeran autogene and pembrolizumab after surgery can help prevent the cancer from coming back in people with non-small cell lung cancer (NSCLC) whose tumors did not respond completely to treatment before surgery (neoadjuvant treatment).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: Providence St. Jude Medical Center ( Site 0106), Fullerton, California
Conditions: Carcinoma, Non-Small-Cell Lung
Pan-tumor MRD Study
Recruiting
The purpose of this observational study is to collect clinical information, blood, and tumor tissue samples from participants diagnosed with stage I, stage II, or operable stage III cancer in select solid tumors. The information collected will be used to develop tests to better understand cancer, for example, to improve cancer detection and to assess the risk of cancer coming back.
Participants will receive routine standard of care from their doctor and their involvement is expected to last for... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: Medical Oncology Associates of San Diego, San Diego, California
Conditions: Muscle Invasive Bladder Urothelial Carcinoma, Esophageal Cancer, Gastric and Gastroesophageal Junction (GEJ) Adenocarcinoma, Melanoma (Skin Cancer), NSCLC (Non-small Cell Lung Cancer), Pancreatic (Exocrine Only), Mix of Solid Tumors (MOST)
A Phase I/IIa Study to Investigate the Safety, Tolerability, Pharmacokinetics, and Efficacy of AZD0022 as Monotherapy and in Combination With Anti-cancer Agents in Adult Participants With Tumours Harbouring a KRASG12D Mutation
Recruiting
This is a first-in-human, modular, Phase I/IIa, open-label, multi-centre study to assess the safety, tolerability, PK, and preliminary efficacy of AZD0022 monotherapy in combination with other anti-cancer agents in participants with tumours harbouring a KRASG12D mutation.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: Research Site, Duarte, California
Conditions: Advanced Solid Tumours, Non-Small Cell Lung Cancer (NSCLC), Pancreatic Ductal Adenocarcinoma (PDAC), Colorectal Cancer (CRC)
Subcutaneous Tarlatamab in Participants With Extensive Stage Small Cell Lung Cancer (DeLLphi-308)
Recruiting
The primary objective of this study is to evaluate the safety and tolerability of subcutaneous (SC) tarlatamab.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: University of Southern California, Norris Comprehensive Cancer Center, Los Angeles, California
Conditions: Extensive Stage Small Cell Lung Cancer
A Study to Test if TEV-56286 is Effective in Relieving Multiple System Atrophy (MSA): A Safety and Efficacy Study
Recruiting
The primary objective of the study is to evaluate the efficacy of TEV-56286 administered orally for the treatment of adult participants with Multiple System Atrophy (MSA).
A secondary objective of the study is to evaluate specific efficacy parameters of TEV-56286.
Another secondary objective is to evaluate the safety and tolerability of TEV-56286.
The planned study period per participant is 56 weeks including a screening period (up to 4 weeks), a 48-week double-blind treatment period, and a f... Read More
Gender:
ALL
Ages:
30 years and above
Trial Updated:
08/13/2025
Locations: Teva Investigational Site 15554, La Jolla, California
Conditions: Multiple System Atrophy
A Phase IIb Randomized, Multicenter Trial of Subretinal CPCB-RPE1 in Advanced Dry AMD (Geographic Atrophy)
Recruiting
This is a Phase IIb randomized, clinical trial designed to assess the safety and efficacy of unilateral implantation of the CPCB-RPE1 implant in subjects with geographic atrophy involving the fovea.
Up to 6 surgical implantation sites will deliver the CPCB-RPE1 in this Phase IIb clinical trial. Additional study sites may serve as referral or follow-up sites. Twenty-four (24) subjects will participate in the trial and will be randomized 3:1 to one of 2 groups:
* The treatment group receiving th... Read More
Gender:
ALL
Ages:
Between 55 years and 90 years
Trial Updated:
08/13/2025
Locations: Retina-Vitreous Associates Medical Group, Beverly Hills, California
Conditions: Dry Age-related Macular Degeneration, Geographic Atrophy
553 - 564 of 5602
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.
Search Clinical Trials in California by Condition
See All Conditions