Paid Clinical Trials in Riverside, CA

As of June 2026, 89 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: June 26, 2026.

Filter results

Filter results

State

City

Facility

Phase

Study type

Intervention

Recruitment status

Condition

Sex

Age

Healthy volunteers only

89 clinical trials

↓ Download CSV

Effectiveness of Cognitive Training in Older and Younger Adults

for Cognitive Change

3 locations incl. Riverside

Sponsor: University of Wisconsin, Madison

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

Code: NCT06375681·Recruiting

Apply to this trial

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

for Fallopian Tube Endometrioid Adenocarcinoma

Drug: Bevacizumab

658 locations incl. Birmingham

Sponsor: NRG Oncology

Sex: All·Age: 18+

Code: NCT06580314·Phase 3·Recruiting

Apply to this trial

A Study to Investigate Effectiveness of Tirzepatide Following Initiation of Ixekizumab in Participants With Active Psoriatic Arthritis and Overweight or Obesity in Clinical Practice (TOGETHER AMPLIFY-PsA)

for Psoriatic Arthritis

Drug: Tirzepatide

53 locations incl. Avondale

Sponsor: Eli Lilly and Company

Sex: All·Age: 18+

Code: NCT06864026·Phase 4·Recruiting

Apply to this trial

A Trial of the Efficacy and Safety of SEP-363856 in Acutely Psychotic Participants With Schizophrenia

for Schizophrenia

35 locations incl. Bentonville

Sponsor: Otsuka Pharmaceutical Development & Commercialization, Inc.

Sex: All·Age: 18 - 65

Code: NCT06894212·Phase 3·Recruiting

Apply to this trial

Digital Health Intervention for Children With ADHD

for ADHD

2 locations incl. Irvine

Sponsor: University of California, Riverside

Sex: All·Age: 8 - 12

Code: NCT06456372·Recruiting

Apply to this trial

Study of LHP588 in Subjects With P. Gingivalis-Positive Alzheimer's Disease

for Alzheimer Disease

39 locations incl. Phoenix

Sponsor: Lighthouse Pharmaceuticals, Inc.

Sex: All·Age: 55 - 80

Code: NCT06847321·Phase 2·Recruiting

Apply to this trial

Mediators and Moderators of Auditory Training

for Hearing Handicap

3 locations incl. Riverside

Sponsor: Northeastern University

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

Code: NCT06812273·Recruiting

Apply to this trial

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

43 locations incl. Huntsville

Sponsor: AstraZeneca

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

Code: NCT06749457·Phase 1, Phase 2·Recruiting

Apply to this trial

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

3 locations incl. Duarte

Sponsor: City of Hope Medical Center

Sex: Female·Age: 18+

Code: NCT06763328·Phase 3·Recruiting

Apply to this trial

A Study to Evaluate the Efficacy and Safety of Autogene Cevumeran With Nivolumab Versus Nivolumab Alone in Participants With High-risk Muscle-invasive Urothelial Carcinoma (MIUC)

for Muscle-invasive Urothelial Carcinoma

Drug: Nivolumab

26 locations incl. Springdale

Sponsor: Hoffmann-La Roche

Sex: All·Age: 18+

Code: NCT06534983·Phase 2·Recruiting

Apply to this trial

ALTO-100 in Bipolar Disorder With Depression (BD-D)

for Bipolar Disorder I or II With a Major Depressive Episode

27 locations incl. Chandler

Sponsor: Alto Neuroscience

Sex: All·Age: 18 - 70

Code: NCT06656416·Phase 2·Recruiting

Apply to this trial

Preventing Alcohol Use Disorders and Alcohol-Related Harms in Pacific Islander Young Adults

for Alcohol Use Disorder

1 location in Riverside

Sponsor: University of California, Riverside

Sex: All·Age: 18 - 30·Accepts healthy volunteers

Code: NCT06337721·Not Yet Recruiting

Targeted Treatment for Advanced Non-Small Cell Lung Cancer That Has a MET Exon 14 Skipping Gene Change (An Expanded Lung-MAP Treatment Trial)

for Recurrent Lung Non-Small Cell Carcinoma

266 locations incl. Daphne

Sponsor: SWOG Cancer Research Network

Sex: All·Age: 18 Minutes+

Code: NCT06031688·Phase 2·Recruiting

Apply to this trial

Continuation Protocol for Obstructive Sleep Apnea (OSA)

for OSA

93 locations incl. Birmingham

Sponsor: Apnimed

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

Code: NCT06566820·Phase 3·Enrolling By Invitation

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

for Advanced Esophageal Adenocarcinoma

Drug: Nivolumab

372 locations incl. Little Rock

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT06203600·Phase 2, Phase 3·Recruiting

Apply to this trial

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

105 locations incl. Anchorage

Sponsor: AstraZeneca

Sex: All·Age: 12 - 17

Code: NCT06307665·Phase 3·Recruiting

Apply to this trial

Clinical Registry Collecting Real World Evidence on Wound Care Treatments

for Wounds and Injuries

12 locations incl. Scottsdale

Sponsor: Siddhey LLC

Sex: All·Age: 18+

Code: NCT06328010·Enrolling By Invitation

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

491 locations incl. Phoenix

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT05987241·Phase 2, Phase 3·Recruiting

Apply to this trial

Mobile Health for Adherence in Breast Cancer Patients

for Anatomic Stage IV Breast Cancer AJCC v8

499 locations incl. Fairbanks

Sponsor: ECOG-ACRIN Cancer Research Group

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

Code: NCT06112613·Recruiting

Apply to this trial

Study of Opevesostat (MK-5684) Versus Alternative NHA in mCRPC (MK-5684-003)

for Prostate Cancer Metastatic

44 locations incl. Orange

Sponsor: Merck Sharp & Dohme LLC

Sex: All·Age: All ages

Code: NCT06136624·Phase 3·Recruiting

Apply to this trial

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

for Major Depressive Disorder

40 locations incl. Bellflower

Sponsor: Axsome Therapeutics, Inc.

Sex: All·Age: 18 - 65

Code: NCT06223880·Phase 4·Recruiting

Apply to this trial

A Study of Opevesostat (MK-5684) Versus Alternative Next-generation Hormonal Agent (NHA) in Metastatic Castration-resistant Prostate Cancer (mCRPC) Post One NHA (MK-5684-004)

for Metastatic Castration-resistant Prostate Cancer (mCRPC)

62 locations incl. Tucson

Sponsor: Merck Sharp & Dohme LLC

Sex: All·Age: 18+

Code: NCT06136650·Phase 3·Recruiting

Apply to this trial

Study of the Bria-IMT Regimen and CPI vs Physicians' Choice in Advanced Metastatic Breast Cancer.

for Breast Cancer

79 locations incl. Phoenix

Sponsor: BriaCell Therapeutics Corporation

Sex: All·Age: 18+

Code: NCT06072612·Phase 3·Recruiting

Apply to this trial

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

1208 locations incl. Birmingham

Sponsor: NRG Oncology

Sex: Female·Age: 18 - 60

Code: NCT05879926·Phase 3·Recruiting

Apply to this trial

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

for Anatomic Stage I Breast Cancer AJCC v8

955 locations incl. Birmingham

Sponsor: SWOG Cancer Research Network

Sex: All·Age: 18+

Code: NCT05929768·Phase 3·Recruiting

Apply to this trial

Lateral Pharyngoplasty Outcomes in Children Undergoing Tonsillectomy

for Sleep-Disordered Breathing

4 locations incl. Murrieta

Sponsor: Loma Linda University

Sex: All·Age: 3 - 17

Code: NCT05575401·Recruiting

Apply to this trial

Comparing Combinations of Targeted Drugs for Advanced Non-Small Cell Lung Cancer That Has EGFR and MET Gene Changes (A Lung-MAP Treatment Trial)

for Recurrent Lung Non-Small Cell Carcinoma

454 locations incl. Daphne

Sponsor: SWOG Cancer Research Network

Sex: All·Age: 18+

Code: NCT05642572·Phase 2·Recruiting

Apply to this trial

Moderators and Mediators of Perceptual Learning

for Cognitive Change

3 locations incl. Riverside

Sponsor: University of Wisconsin, Madison

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

Code: NCT05894967·Recruiting

Apply to this trial

A Study to Learn About How 20-Valent Pneumococcal Conjugate Vaccine Works in a Real-world Setting

for Pneumonia

40 locations incl. El Centro

Sponsor: Pfizer

Sex: All·Age: 65+

Code: NCT05452941·Recruiting

Apply to this trial

A Study of Tucatinib With Trastuzumab and mFOLFOX6 Versus Standard of Care Treatment in First-line HER2+ Metastatic Colorectal Cancer

for Colorectal Neoplasms

128 locations incl. Glendale

Sponsor: Seagen, a wholly owned subsidiary of Pfizer

Sex: All·Age: 18+

Code: NCT05253651·Phase 3·Recruiting

Apply to this trial

Combined Dose-Finding and CV Outcomes Study With CSL300 (Clazakizumab) in Adult Subjects With ESKD Undergoing Dialysis (POSIBIL6ESKD)

for Atherosclerotic Cardiovascular Disease in Patients With ESKD

Drug: Clazakizumab

164 locations incl. Decatur

Sponsor: CSL Behring

Sex: All·Age: 18+

Code: NCT05485961·Phase 2, Phase 3·Recruiting

Apply to this trial

Colon Adjuvant Chemotherapy Based on Evaluation of Residual Disease

for Stage III Colon Cancer

1021 locations incl. Birmingham

Sponsor: NRG Oncology

Sex: All·Age: 18+

Code: NCT05174169·Phase 2, Phase 3·Recruiting

Apply to this trial

Evaluating the Addition of the Immunotherapy Drug Atezolizumab to Standard Chemotherapy Treatment for Advanced or Metastatic Neuroendocrine Carcinomas That Originate Outside the Lung

for Advanced Extrapulmonary Neuroendocrine Carcinoma

Drug: Atezolizumab

250 locations incl. Anchorage

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT05058651·Phase 2, Phase 3·Recruiting

Apply to this trial

A Study of Disitamab Vedotin Alone or With Pembrolizumab in Urothelial Cancer That Expresses HER2

for Urothelial Carcinoma

159 locations incl. Gilbert

Sponsor: Seagen, a wholly owned subsidiary of Pfizer

Sex: All·Age: 18+

Code: NCT04879329·Phase 2·Recruiting

Apply to this trial

An Extension Study to Assess Long-Term Safety and Tolerability of Adjunctive KarXT in Subjects With Inadequately Controlled Symptoms of Schizophrenia

for Schizophrenia

Drug: KarXT

79 locations incl. Phoenix

Sponsor: Karuna Therapeutics, Inc., a Bristol Myers Squibb company

Sex: All·Age: 18 - 65

Code: NCT05304767·Phase 3·Recruiting

Apply to this trial

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

for Adenocarcinoma of the Colon

472 locations incl. Fairbanks

Sponsor: NRG Oncology

Sex: All·Age: 45 - 70

Code: NCT05080673·Recruiting

Apply to this trial

Safety and Efficacy of Brilaroxazine (RP5063) in Schizophrenia

for Schizophrenia

18 locations incl. Phoenix

Sponsor: Reviva Pharmaceuticals

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

Code: NCT05184335·Phase 3·Recruiting

Apply to this trial

Pivotal 2 Study of RGX-314 Gene Therapy in Participants With nAMD

for AMD

107 locations incl. Phoenix

Sponsor: AbbVie

Sex: All·Age: 50 - 89

Code: NCT05407636·Phase 3·Recruiting

Apply to this trial

Proact: A Study of REACT in Subjects With Type 2 Diabetes Mellitus and Chronic Kidney Disease

for Type 2 Diabetes Mellitus

79 locations incl. Huntsville

Sponsor: Prokidney

Sex: All·Age: 30 - 80

Code: NCT05099770·Phase 3·Recruiting

Apply to this trial

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

812 locations incl. Birmingham

Sponsor: NRG Oncology

Sex: All·Age: 50 - 70

Code: NCT04852887·Phase 3·Recruiting

Apply to this trial