Location · Illinois
Clinical trials recruiting in Illinois
890 recruiting studies have at least one site in Illinois; 285 accept healthy volunteers. Studies that need a specific condition are included too, so check each listing.
Want the research companies that run paid Phase 1 studies for healthy volunteers? Paid clinical trial companies in Illinois.
890 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- RecruitingHealthy volunteers
Extensively Hydrolyzed Formula Growth Monitioring Study (GMS)
Mead Johnson Nutrition
- Location
- Moline, IL + 9 other US sites
- Eligibility basics
- Ages 0 mo–0 mo
- RecruitingHealthy volunteersPhase 3
A Study to Learn About How a New Pneumococcal Vaccine Works in Infants.
Pfizer
- Location
- Moline, IL + 101 other US sites
- Eligibility basics
- Ages 1 mo–7 mo
- RecruitingHealthy volunteersPhase 4
Study of a Recombinant Spike COVID-19 Vaccine With Matrix-M in Older Adults and People at Increased Risk of Severe COVID-19
Sanofi
- Location
- Melrose Park, IL + 19 other US sites
- Eligibility basics
- Ages 12+
- RecruitingHealthy volunteersPhase 3
A Study to Assess the Safety, Tolerability, and Immunogenicity of 3 Lots of a Multivalent Pneumococcal Conjugate Vaccine Administered to Adults
Pfizer
- Location
- Melrose Park, IL + 36 other US sites
- Eligibility basics
- Ages 18–49
- RecruitingHealthy volunteersPhase 3
A Study to Learn About a Clostridioides Difficile Vaccine in People 65 Years of Age and Older
Pfizer
- Location
- Melrose Park, IL + 138 other US sites
- Eligibility basics
- Ages 65+
- RecruitingHealthy volunteers
Effect of a Dietary Supplement Versus Placebo on Serum PFAS Levels in Male Firefighters
Cambiotics ApS
- Location
- Chicago, IL
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
BoxX-NoAF Clinical Trial
AtriCure, Inc.
- Location
- Chicago, IL + 30 other US sites
- Eligibility basics
- Ages 65+
- RecruitingHealthy volunteers
Observational Study of Decentralized Urine Optical Interaction Patterns Associated With Environmental Microplastic and Nanoplastic Exposure
Ecotera Health LLC
- Location
- Chicago, IL + 50 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Evaluation of Approved Contact Lenses (CR-6657)
Johnson & Johnson Vision Care, Inc.
- Location
- Franklin Park, IL + 3 other US sites
- Eligibility basics
- Ages 18–39
- RecruitingHealthy volunteers
The Effects of Daily Supplementation of a Soluble Fiber on the Fecal Microbiota in Volunteers.
Roquette Freres
- Location
- Addison, IL
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteers
A Randomized Comparison of Stage-Based Care Versus Risk Factor-Based Care for Prevention of Cardiovascular Events
Cleerly, Inc.
- Location
- Chicago, IL + 121 other US sites
- Eligibility basics
- Ages 55+
- RecruitingHealthy volunteersPhase 3
A Study on the Efficacy of a Vaccine Against Influenza in Adults ≥65 Years of Age
GlaxoSmithKline
- Location
- Chicago, IL + 130 other US sites
- Eligibility basics
- Ages 65+
- RecruitingHealthy volunteersPhase 3
A Study to Learn About the Safety of an Expanded Pneumococcal Vaccine in Healthy Infants
Pfizer
- Location
- Chicago, IL + 20 other US sites
- Eligibility basics
- Ages 1 mo–4 mo
- RecruitingHealthy volunteers
Falcon Real World Evidence Registry
Exact Sciences Corporation
- Location
- Evanston, IL + 1 other US site
- Eligibility basics
- Ages 50–80
- RecruitingHealthy volunteers
Effects of Continuous Yogurt Intake on Immunomodulatory Function and Subjective Health Status in Healthy U.S. Adults
Meiji Co., Ltd.
- Location
- Chicago, IL
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
A Prospective Controlled Study to Evaluate the Safety and Effectiveness of Thermage® FLX Radiofrequency Treatment
Bausch Health Americas, Inc.
- Location
- Chicago, IL + 5 other US sites
- Eligibility basics
- Ages 30–60
- RecruitingHealthy volunteers
An Evaluation of Long-Term Supplement Use on Biological Age and Metabolic Health Markers - The BioAge Trial
Shaklee Corporation
- Location
- Addison, IL
- Eligibility basics
- Ages 40+
- RecruitingHealthy volunteers
Tempus Open Link for Individual Voices in Innovative Analytics Registry: Platform Protocol for Multimodal Real-World Evidence in Cancer
Tempus AI
- Location
- Chicago, IL
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Shield Post-Approval Study Protocol
Guardant Health, Inc.
- Location
- Bourbonnais, IL + 48 other US sites
- Eligibility basics
- Ages 45–81
- RecruitingHealthy volunteers
Intalight Reference Database Protocol for VG200D
Intalight, Inc
- Location
- Chicago, IL + 2 other US sites
- Eligibility basics
- Ages 22+
- RecruitingHealthy volunteers
Motiva Implants® Post-Approval Study
Motiva USA LLC
- Location
- Chicago, IL + 32 other US sites
- Eligibility basics
- Ages 22+ · Women only
- RecruitingHealthy volunteers
A Multi-Site Study to Assess the Effect of Availability of a Heated Tobacco Product on Smoking Abstinence Among Current Primary Cigarette Smokers
RAI Services Company
- Location
- Aurora, IL + 7 other US sites
- Eligibility basics
- Ages 21–65
- RecruitingHealthy volunteers
Multicenter Trial of Antibiotic Eluting Graft for Promoting New Bone Growth in/Near Infected Bone Cavities
Elute, Inc.
- Location
- Skokie, IL + 11 other US sites
- Eligibility basics
- Ages 22+
- RecruitingHealthy volunteers
Development of a Home Test for Measuring Blood P-tau217 in Alzheimer's Disease Using the Tasso Lancet Device
Neurogen Biomarking LLC
- Location
- Chicago, IL
- Eligibility basics
- Ages 40–90