Paid Clinical Trials in Riverside, CA

As of August 2026, 86 paid clinical trials are recruiting in Riverside, California. Compensation typically covers time, travel, and study visits, with stipends ranging from modest amounts for short outpatient studies to several thousand dollars for long or inpatient protocols.

Both patients with specific conditions and healthy volunteers can qualify. Most trials offer free study-related medical care alongside compensation.

Recruiting trial data synced daily from ClinicalTrials.gov. Last sync: August 10, 2026.

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78 clinical trials

Safety and Efficacy of Brilaroxazine (RP5063) in Schizophrenia

for Schizophrenia

Sites in Riverside, Garden Grove +16 more locations

Sponsor: Reviva Pharmaceuticals

Sex: All·Age: 18 - 65·Accepts healthy volunteers

Code: NCT05184335·Phase 3·Recruiting·Listed Jan 2022

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Study to Evaluate Efficacy and Safety of Roluperidone in Adult Subjects With Negative Symptoms and Stable Positive Symptoms of Schizophrenia and to Evaluate the Relapse Rate of Roluperidone and Antipsychotic Medications

for Negative Symptoms of Schizophrenia

Sites in Riverside, Garden Grove +11 more locations

Sponsor: Minerva Neurosciences

Sex: All·Age: 18 - 55

Code: NCT07565428·Phase 3·Recruiting·Listed May 2026

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NBI-1117568-SCZ3030: Evaluation of NBI-1117568 in Inpatient Adults With Schizophrenia

for Schizophrenia

Drug: NBI-1117568

Sites in Riverside, Garden Grove +3 more locations

Sponsor: Neurocrine Biosciences

Sex: All·Age: 18 - 65

Code: NCT07105098·Phase 3·Recruiting·Listed Aug 2025

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Access Cannulation Trial II

for Dialysis

Sites in Riverside +7 more locations

Sponsor: Voyager Biomedical

Sex: All·Age: 18+

Code: NCT05490225·Recruiting·Listed Aug 2022

Apply to this trial

California MEPS Hub

for HIV Prevention

Sites in Riverside & Oakland

Sponsor: University of California, Los Angeles

Sex: Male·Age: 18 - 59·Accepts healthy volunteers

Code: NCT07433985·Recruiting·Listed Feb 2026

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Evaluating the Addition of Adjuvant Chemotherapy to Ovarian Function Suppression Plus Endocrine Therapy in Premenopausal Patients With pN0-1, ER-Positive/HER2-Negative Breast Cancer and an Oncotype Recurrence Score Less Than or Equal to 25

for Breast Cancer

Sites in Riverside, Loma Linda +1098 more locations

Sponsor: NRG Oncology

Sex: Female·Age: 18 - 60

Code: NCT05879926·Phase 3·Recruiting·Listed May 2023

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Testing the Addition of a Type of Drug Called Immunotherapy to the Usual Chemotherapy Treatment for Non-small Cell Lung Cancer, an ALCHEMIST Treatment Trial (Chemo-IO [ACCIO])

for Lung Non-Small Cell Carcinoma

Sites in Riverside, Loma Linda +631 more locations

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT04267848·Phase 3·Recruiting·Listed Feb 2020

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Colon Adjuvant Chemotherapy Based on Evaluation of Residual Disease

for Stage III Colon Cancer

Sites in Riverside, Loma Linda +913 more locations

Sponsor: NRG Oncology

Sex: All·Age: 18+

Code: NCT05174169·Phase 2, Phase 3·Recruiting·Listed Dec 2021

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Testing Early Treatment for Patients With High-Risk Chronic Lymphocytic Leukemia (CLL) or Small Lymphocytic Leukemia (SLL), EVOLVE CLL/SLL Study

for Chronic Lymphocytic Leukemia

Sites in Riverside, Fontana +295 more locations

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT04269902·Phase 3·Recruiting·Listed Feb 2020

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Testing Olaparib for One or Two Years, With or Without Bevacizumab, to Treat Ovarian Cancer

for Fallopian Tube Endometrioid Adenocarcinoma

Drug: Bevacizumab

Sites in Riverside, Irvine +653 more locations

Sponsor: NRG Oncology

Sex: All·Age: 18+

Code: NCT06580314·Phase 3·Recruiting·Listed Aug 2024

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Five or Ten Year Colonoscopy for 1-2 Non-Advanced Adenomatous Polyps

for Adenocarcinoma of the Colon

Sites in Riverside, Fontana +325 more locations

Sponsor: NRG Oncology

Sex: All·Age: 45 - 70

Code: NCT05080673·Recruiting·Listed Oct 2021

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Testing the Role of DNA Released From Tumor Cells Into the Blood in Guiding the Use of Immunotherapy After Surgical Removal of the Bladder, Kidney, Ureter, and Urethra for Urothelial Cancer Treatment, MODERN Study

for Muscle Invasive Bladder Urothelial Carcinoma

Sites in Riverside, Fontana +445 more locations

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT05987241·Phase 2, Phase 3·Recruiting·Listed Aug 2023

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A Study to Compare Two Surgical Procedures in Individuals With BRCA1 Mutations to Assess Reduced Risk of Ovarian Cancer

for Ovarian Carcinoma

Sites in Riverside, Upland +479 more locations

Sponsor: NRG Oncology

Sex: Female·Age: 35 - 50

Code: NCT04251052·Recruiting·Listed Jan 2020

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E-Mindfulness Approaches for Living After Breast Cancer

for Breast Cancer

Sites in Riverside, Fontana +372 more locations

Sponsor: NRG Oncology

Sex: All·Age: 18 - 50

Code: NCT06748222·Phase 3·Recruiting·Listed Dec 2024

Apply to this trial

Mobile Health for Adherence in Breast Cancer Patients

for Anatomic Stage IV Breast Cancer AJCC v8

Sites in Riverside, Fontana +457 more locations

Sponsor: ECOG-ACRIN Cancer Research Group

Sex: All·Age: 18+·Accepts healthy volunteers

Code: NCT06112613·Recruiting·Listed Nov 2023

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Docetaxel to Androgen Receptor Pathway Inhibitors in Patients With Metastatic Castration Sensitive Prostate Cancer and Suboptimal PSA Response

for Prostate Cancer (Adenocarcinoma)

Sites in Riverside, Fontana +357 more locations

Sponsor: Canadian Cancer Trials Group

Sex: Male·Age: 18+

Code: NCT06592924·Phase 3·Recruiting·Listed Sep 2024

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Lung-MAP: A Master Screening Protocol for Previously-Treated Non-Small Cell Lung Cancer

for Previously Treated Non-Small Cell Lung Cancer

Sites in Riverside, Loma Linda +948 more locations

Sponsor: SWOG Cancer Research Network

Sex: All·Age: 18+

Code: NCT03851445·Phase 2, Phase 3·Recruiting·Listed Feb 2019

Apply to this trial

Adding Nivolumab to Usual Treatment for People With Advanced Stomach or Esophageal Cancer, PARAMUNE Trial

for Advanced Esophageal Adenocarcinoma

Drug: Nivolumab

Sites in Riverside, Fontana +342 more locations

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT06203600·Phase 2, Phase 3·Recruiting·Listed Jan 2024

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Inclisiran Versus Placebo for the Prevention of Major Adverse Cardiovascular and Limb Events in Patients Undergoing Percutaneous Coronary Intervention or Peripheral Endovascular Intervention

for Percutaneous Coronary Intervention

Drug: Inclisiran

Sites in Riverside, Glendora +119 more locations

Sponsor: Duke University

Sex: All·Age: 18+

Code: NCT06909565·Phase 4·Recruiting·Listed Apr 2025

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De-Escalation of Breast Radiation Trial for Hormone Sensitive, HER-2 Negative, Oncotype Recurrence Score Less Than or Equal to 18 Breast Cancer (DEBRA)

for Stage I Breast Cancer

Sites in Riverside, Ontario +705 more locations

Sponsor: NRG Oncology

Sex: All·Age: 50 - 70

Code: NCT04852887·Phase 3·Recruiting·Listed Apr 2021

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Adding the Immunotherapy Drug Cemiplimab to Usual Treatment for People With Advanced Non-Small Cell Lung Cancer Who Had Previous Treatment With Platinum Chemotherapy and Immunotherapy (An Expanded Lung-MAP Treatment Trial)

for Recurrent Lung Non-Small Cell Carcinoma

Drug: Cemiplimab

Sites in Riverside, Loma Linda +379 more locations

Sponsor: SWOG Cancer Research Network

Sex: All·Age: 18+

Code: NCT06616584·Phase 2, Phase 3·Recruiting·Listed Sep 2024

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S1703 Serum Tumor Marker Directed Disease Monitoring in Patients With Hormone Receptor Positive Her2 Negative Metastatic Breast Cancer

for Anatomic Stage IV Breast Cancer AJCC v8

Sites in Riverside, Fontana +584 more locations

Sponsor: SWOG Cancer Research Network

Sex: All·Age: 18+

Code: NCT03723928·Recruiting·Listed Oct 2018

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Recombinant Factor VIIa (rFVIIa) for Hemorrhagic Stroke Trial - Part 2

for Intracerebral Hemorrhage

Sites in Riverside, Fontana +46 more locations

Sponsor: Joseph Broderick, MD

Sex: All·Age: 18 - 80

Code: NCT07227246·Phase 3·Recruiting·Listed Nov 2025

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Metformin for the Treatment of Insulin Resistance in Women With Stage I-III Breast Cancer Completing Chemotherapy

for Anatomic Stage I Breast Cancer AJCC v8

Sites in Riverside, Duarte & La Jolla

Sponsor: City of Hope Medical Center

Sex: Female·Age: 18+

Code: NCT06763328·Phase 3·Recruiting·Listed Jan 2025

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Effectiveness of Cognitive Training in Older and Younger Adults

for Cognitive Change

Sites in Riverside +2 more locations

Sponsor: University of Wisconsin, Madison

Sex: All·Age: 18 - 85·Accepts healthy volunteers

Code: NCT06375681·Recruiting·Listed Apr 2024

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Shorter Chemo-Immunotherapy Without Anthracycline Drugs for Early-Stage Triple Negative Breast Cancer

for Anatomic Stage I Breast Cancer AJCC v8

Sites in Riverside, Loma Linda +913 more locations

Sponsor: SWOG Cancer Research Network

Sex: All·Age: 18+

Code: NCT05929768·Phase 3·Recruiting·Listed Jul 2023

Apply to this trial

Mediators and Moderators of Auditory Training

for Hearing Handicap

Sites in Riverside +2 more locations

Sponsor: Northeastern University

Sex: All·Age: 18 - 85·Accepts healthy volunteers

Code: NCT06812273·Recruiting·Listed Feb 2025

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Lateral Pharyngoplasty Outcomes in Children Undergoing Tonsillectomy

for Sleep-Disordered Breathing

Sites in Riverside, San Bernardino & Murrieta

Sponsor: Loma Linda University

Sex: All·Age: 3 - 17

Code: NCT05575401·Recruiting·Listed Oct 2022

Apply to this trial

Digital Health Intervention for Children With ADHD

for ADHD

Sites in Riverside & Irvine

Sponsor: University of California, Riverside

Sex: All·Age: 8 - 12

Code: NCT06456372·Recruiting·Listed Jun 2024

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Moderators and Mediators of Perceptual Learning

for Cognitive Change

Sites in Riverside +2 more locations

Sponsor: University of Wisconsin, Madison

Sex: All·Age: 18 - 85·Accepts healthy volunteers

Code: NCT05894967·Recruiting·Listed Jun 2023

Apply to this trial

Ramucirumab and Paclitaxel or FOLFIRI in Advanced Small Bowel Cancers

for Metastatic Small Intestinal Adenocarcinoma

Sites in Riverside, Fontana +397 more locations

Sponsor: SWOG Cancer Research Network

Sex: All·Age: 18+

Code: NCT04205968·Phase 2·Recruiting·Listed Dec 2019

Apply to this trial

Phase 1a/b Tolerability of NTR-1011 in Healthy Adults and Adult Patients With SLE and RA

for SLE (Systemic Lupus)

Sites in Riverside, Covina +5 more locations

Sponsor: Neutrolis

Sex: All·Age: 18 - 75

Code: NCT07237659·Phase 1·Recruiting·Listed Nov 2025

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Testing the Addition of Herceptin Hylecta or Phesgo to the Usual Chemotherapy for HER2 Positive Endometrial Serous Carcinoma or Carcinosarcoma

for Endometrial Carcinoma

Sites in Riverside, Irvine +325 more locations

Sponsor: National Cancer Institute (NCI)

Sex: Female·Age: 18+

Code: NCT05256225·Phase 3·Recruiting·Listed Feb 2022

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A Phase III Study of AZD0780 on Major Adverse CV Events in Patients With a History of ASCVD Events or at High Risk for a First Event

for Cardiovascular Disease

Sites in Riverside, Norco +294 more locations

Sponsor: AstraZeneca

Sex: All·Age: 18+

Code: NCT07000357·Phase 3·Recruiting·Listed Jun 2025

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Evaluating the Efficacy and Safety of PT027 Compared With PT007 Administered As Needed in Participants 12 to < 18 Years of Age With Asthma

for Asthma

Sites in Riverside, Moreno Valley +88 more locations

Sponsor: AstraZeneca

Sex: All·Age: 12 - 17

Code: NCT06307665·Phase 3·Recruiting·Listed Mar 2024

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A Study to Evaluate AZD7760 Safety and Pharmacokinetics in Healthy Adults (Phase I) and Adults With End-stage Kidney Disease on Hemodialysis With a Central Venous Catheter (Phase IIa)

for Staphylococcus Aureus

Sites in Riverside, San Dimas +37 more locations

Sponsor: AstraZeneca

Sex: All·Age: 18 - 55·Accepts healthy volunteers

Code: NCT06749457·Phase 1, Phase 2·Recruiting·Listed Dec 2024

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A Study to Evaluate the Efficacy of AXS-05 Compared to Bupropion in Preventing the Relapse of Depressive Symptoms

for Major Depressive Disorder

Sites in Riverside, Redlands +38 more locations

Sponsor: Axsome Therapeutics, Inc.

Sex: All·Age: 18 - 65

Code: NCT06223880·Phase 4·Recruiting·Listed Jan 2024

Apply to this trial