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Drug Use and Addiction clinical trials in St. Louis, MO

3 studies for Drug Use and Addiction are looking for participants at sites in and around St. Louis (within about 30 miles). Open a study to see who can join and how to contact the study team.

Recruiting for a study here? Feature it at the top of this page — $99 for 30 days →

About Drug Use and Addiction

Drugs include prescription and over-the-counter medicines, alcohol, tobacco, and illegal substances. Repeated drug use can change the brain and lead to addiction.

More about Drug Use and Addiction on MedlinePlus

Drug Use and Addiction trials in other cities

• Baltimore, MD13 studies
• New York City, NY9 studies
• Houston, TX9 studies
• New Haven, CT8 studies
• Charleston, SC8 studies
• Boston, MA7 studies
• Chicago, IL7 studies
• San Francisco, CA6 studies
• San Diego, CA6 studies
• Los Angeles, CA6 studies
• Dallas, TX5 studies
• Providence, RI5 studies

Other studies in St. Louis

• Non-Small Cell Lung Cancer73 studies
• Breast Cancer64 studies
• Metastatic Cancer54 studies
• Colorectal Cancer50 studies
• Cancer (all types)46 studies
• Prostate Cancer46 studies
• Lung Cancer39 studies
• Ovarian Cancer38 studies
• Pancreatic Cancer33 studies
• Endometrial Cancer29 studies
• Head and Neck Squamous Cell Carcinoma28 studies
• Heart Failure26 studies

From ClinicalTrials.gov, data retrieved Oct 6, 2026. Each study sets its own eligibility; the study team decides who can join.