Paid Clinical Trials in O'Fallon, IL

As of June 2026, 130 paid clinical trials are recruiting in O'Fallon, Illinois. 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 18, 2026.

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130 clinical trials

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A Study Evaluating the Efficacy and Safety of Inavolisib Plus CDK4/6 Inhibitor and Letrozole vs Placebo + CDK4/6i and Letrozole in Participants With Endocrine-Sensitive PIK3CA-Mutated, Hormone Receptor-Positive, HER2-Negative Advanced Breast Cancer

for Breast Cancer

51 locations incl. Phoenix

Sponsor: Hoffmann-La Roche

Sex: All·Age: 18+

Code: NCT06790693·Phase 3·Recruiting

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Testing the Addition of Anti-Cancer Drug, Cetuximab, to Standard of Care Treatment (Pembrolizumab) for Returning or Spreading Head and Neck Cancer After Previous Treatment

for Metastatic Head and Neck Squamous Cell Carcinoma

177 locations incl. Little Rock

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT06589804·Phase 3·Recruiting

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Testing the Addition of the Anti-Cancer Drug Tivozanib to Immunotherapy (Pembrolizumab) After Surgery to Remove All Known Sites of Kidney Cancer

for Clear Cell Renal Cell Carcinoma

414 locations incl. Phoenix

Sponsor: Alliance for Clinical Trials in Oncology

Sex: All·Age: 18+

Code: NCT06661720·Phase 3·Recruiting

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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

658 locations incl. Birmingham

Sponsor: NRG Oncology

Sex: All·Age: 18+

Code: NCT06580314·Phase 3·Recruiting

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Non-healing Venous Leg Ulcers Treated With Standard Care With or Without BR-AC

for Non-infected Venous Leg Ulcer

23 locations incl. Guntersville

Sponsor: BioStem Technologies

Sex: All·Age: 18+

Code: NCT06811909·Recruiting

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Targeted Treatment for Metastatic Prostate Cancer, The PREDICT Trial

for Castration-Resistant Prostate Carcinoma

107 locations incl. Birmingham

Sponsor: Alliance for Clinical Trials in Oncology

Sex: All·Age: 18+

Code: NCT06632977·Phase 2·Recruiting

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Assessing Benefits and Harms of Cannabis/Cannabinoid Use Among Cancer Patients Treated in Community Oncology Clinics

for Breast Carcinoma

464 locations incl. Fairbanks

Sponsor: Wake Forest University Health Sciences

Sex: All·Age: 18+

Code: NCT06418204·Recruiting

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Tissue Repair Gel in Venous Leg Ulcers (US)

for Venous Leg Ulcer

33 locations incl. Tucson

Sponsor: TR Therapeutics

Sex: All·Age: 18+

Code: NCT06707090·Phase 3·Recruiting

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A Study to Evaluate Zilovertamab Vedotin (MK-2140) Combination With Rituximab Plus Cyclophosphamide, Doxorubicin, and Prednisone (R-CHP) Versus Rituximab Plus Cyclophosphamide, Doxorubicin, Vincristine, and Prednisone (R-CHOP) in Participants With Previously Untreated DLBCL (MK-2140-010)

for Diffuse Large B-Cell Lymphoma

Drug: Rituximab

42 locations incl. Gilbert

Sponsor: Merck Sharp & Dohme LLC

Sex: All·Age: 18+

Code: NCT06717347·Phase 3·Recruiting

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Testing Longer Duration Radiation Therapy Versus the Usual Radiation Therapy in Patients With Cancer That Has Spread to the Brain

for Anatomic Stage IV Breast Cancer AJCC v8

256 locations incl. Tucson

Sponsor: NRG Oncology

Sex: All·Age: 18+

Code: NCT06500455·Phase 3·Recruiting

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Comparing Impact of Treatment Before or After Surgery in Patients With Stage II-IIIB Resectable Non-small Cell Lung Cancer

for Resectable Lung Non-Small Cell Carcinoma

378 locations incl. Birmingham

Sponsor: Alliance for Clinical Trials in Oncology

Sex: All·Age: 18+

Code: NCT06632327·Phase 3·Recruiting

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Testing Whether the Addition of Carboplatin Chemotherapy to Cabazitaxel Chemotherapy Will Improve Outcomes Compared to Cabazitaxel Alone in People With Castrate-Resistant Prostate Cancer That Has Spread Beyond the Prostate to Other Parts of the Body

for Castration-Resistant Prostate Carcinoma

174 locations incl. Fayetteville

Sponsor: SWOG Cancer Research Network

Sex: Male·Age: 18+

Code: NCT06470243·Phase 3·Recruiting

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Targeted Treatment for Advanced Non-Small Cell Lung Cancer That Has Increased Copies of the MET Gene (An Expanded Lung-MAP Treatment Trial)

for Lung Non-Small Cell Carcinoma

248 locations incl. Jonesboro

Sponsor: SWOG Cancer Research Network

Sex: All·Age: 18+

Code: NCT06116682·Phase 2·Recruiting

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A Non-interventional, Post-authorisation Safety Study of Patients Treated With Efgartigimod Alfa

for Myasthenia Gravis

17 locations incl. San Francisco

Sponsor: argenx

Sex: All·Age: 18+

Code: NCT06298565·Recruiting

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Comparing Rituximab and Mosunetuzumab Drug Treatments for People With Low Tumor Burden Follicular Lymphoma

for Classic Follicular Lymphoma

Drug: Mosunetuzumab

267 locations incl. Birmingham

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT06337318·Phase 3·Recruiting

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Venetoclax and HMA Treatment of Older and Unfit Adults With FLT3 Mutated Acute Myeloid Leukemia (AML) (A MyeloMATCH Treatment Trial)

for Acute Myeloid Leukemia

Drug: Venetoclax

221 locations incl. Birmingham

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT06317649·Phase 2·Recruiting

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Testing the Effects of Novel Therapeutics for Newly Diagnosed, Untreated Patients With High-Risk Acute Myeloid Leukemia (A MyeloMATCH Treatment Trial)

for Acute Myeloid Leukemia

211 locations incl. Birmingham

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18 - 59

Code: NCT05554406·Phase 2·Recruiting

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Comparing Cytarabine + Daunorubicin Therapy Versus Cytarabine + Daunorubicin + Venetoclax Versus Venetoclax + Azacitidine in Younger Patients With Intermediate Risk AML (A MyeloMATCH Treatment Trial)

for Acute Myeloid Leukemia

Drug: Venetoclax

167 locations incl. Birmingham

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18 - 59

Code: NCT05554393·Phase 2·Recruiting

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Fast Induced Remodeling in Heart Failure With Preserved Ejection Fraction

for Heart Failure With Preserved Ejection Fraction

8 locations incl. Naples

Sponsor: Medtronic Cardiac Rhythm and Heart Failure

Sex: All·Age: 18+

Code: NCT05839730·Recruiting

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Measuring if Immunotherapy Plus Chemotherapy is Better Than Chemotherapy Alone for Patients With Aggressive Poorly Differentiated Sarcomas

for Metastatic Dedifferentiated Liposarcoma

245 locations incl. Phoenix

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT06422806·Phase 3·Recruiting

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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

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Vitaccess Real MG Registry

for Myasthenia Gravis

6 locations incl. Orange

Sponsor: Vitaccess Ltd

Sex: All·Age: 18+

Code: NCT06064461·Recruiting

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Chemotherapy Combined With Immunotherapy Versus Immunotherapy Alone for Older Adults With Stage IIIB-IV Lung Cancer, The ACHIEVE Trial

for Advanced Lung Non-Small Cell Carcinoma

318 locations incl. Fayetteville

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 70+

Code: NCT06096844·Phase 3·Recruiting

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TEMPUS ARIES: A Biobank Registry Platform Study in Oncology

for Cancer

31 locations incl. Birmingham

Sponsor: Tempus AI

Sex: All·Age: 18 - 99

Code: NCT06207032·Recruiting

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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

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MYELOMATCH: A Screening Study to Assign People With Myeloid Cancer to a Treatment Study or Standard of Care Treatment Within myeloMATCH (MyeloMATCH Screening Trial)

for Acute Myeloid Leukemia

335 locations incl. Birmingham

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT05564390·Phase 2·Recruiting

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Testing the Use of Neratinib or the Combination of Neratinib and Palbociclib Targeted Treatment for HER2+ Solid Tumors (A ComboMATCH Treatment Trial)

for Malignant Female Reproductive System Neoplasm

186 locations incl. Birmingham

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT06126276·Phase 2·Recruiting

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Cognitive Training for Cancer Related Cognitive Impairment in Breast Cancer Survivors

for Breast Cancer

673 locations incl. Anchorage

Sponsor: NRG Oncology

Sex: All·Age: 18 - 100

Code: NCT05896189·Recruiting

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Cost Communication and Financial Navigation in Cancer Patients (COSTCOM)

for Malignant Solid Neoplasm

384 locations incl. Anchorage

Sponsor: ECOG-ACRIN Cancer Research Group

Sex: All·Age: All ages·Accepts healthy volunteers

Code: NCT06295367·Recruiting

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A Natural History Study in Participants With Congenital Myasthenic Syndromes (CMS) Due to Mutations in DOK7, MUSK, AGRN, or LRP4

for Congenital Myasthenic Syndrome

6 locations incl. Sacramento

Sponsor: argenx

Sex: All·Age: 2+

Code: NCT06078553·Recruiting

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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

491 locations incl. Phoenix

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT05987241·Phase 2, Phase 3·Recruiting

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Vitamin D for Prostate Endocrine Therapy

for Stage I Prostate Cancer AJCC v8

51 locations incl. Newark

Sponsor: University of Rochester

Sex: Male·Age: 50+

Code: NCT05838716·Phase 3·Recruiting

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Testing Shorter Duration Radiation Therapy Versus the Usual Radiation Therapy in Patients With High Risk Prostate Cancer

for Prostate Adenocarcinoma

388 locations incl. Birmingham

Sponsor: NRG Oncology

Sex: Male·Age: 18+

Code: NCT05946213·Phase 3·Recruiting

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LOTUS-CC: An Observational Research Study to Uncover Subtypes of Cancer Cachexia

for Advanced Colorectal Carcinoma

225 locations incl. Fort Smith

Sponsor: University of Rochester

Sex: All·Age: 18+

Code: NCT06073431·Recruiting

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Adding an Immunotherapy Drug, MEDI4736 (Durvalumab), to the Usual Chemotherapy Treatment (Paclitaxel, Cyclophosphamide, and Doxorubicin) for Stage II-III Breast Cancer

for Anatomic Stage II Breast Cancer AJCC v8

Drug: Durvalumab

539 locations incl. Birmingham

Sponsor: National Cancer Institute (NCI)

Sex: All·Age: 18+

Code: NCT06058377·Phase 3·Recruiting

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Testing Continuous Versus Intermittent Treatment With the Study Drug Zanubrutinib for Older Patients With Previously Untreated Mantle Cell Lymphoma

for Mantle Cell Lymphoma

237 locations incl. Little Rock

Sponsor: Alliance for Clinical Trials in Oncology

Sex: All·Age: 60+

Code: NCT05976763·Phase 3·Recruiting

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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

1208 locations incl. Birmingham

Sponsor: NRG Oncology

Sex: Female·Age: 18 - 60

Code: NCT05879926·Phase 3·Recruiting

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Evaluating the Impact of Social and Genetic Factors on Outcomes in Adolescent and Young Adult Cancer Survivors

for Hodgkin Lymphoma

428 locations incl. Anchorage

Sponsor: ECOG-ACRIN Cancer Research Group

Sex: All·Age: 18+

Code: NCT06002828·Recruiting

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Comparing Combinations of Drugs to Treat Newly Diagnosed Multiple Myeloma (NDMM) When a Stem Cell Transplant is Not a Medically Suitable Treatment

for Plasma Cell Myeloma

397 locations incl. Anchorage

Sponsor: SWOG Cancer Research Network

Sex: All·Age: All ages

Code: NCT05561387·Phase 3·Recruiting

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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

955 locations incl. Birmingham

Sponsor: SWOG Cancer Research Network

Sex: All·Age: 18+

Code: NCT05929768·Phase 3·Recruiting

Apply to this trial