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Cannabis clinical trials recruiting in the U.S.

47 studies for Cannabis are recruiting participants at sites across the United States.

Cannabis, or marijuana, contains many chemicals, including CBD and THC, which causes a high. Learn about the short and long-term effects of cannabis use.

Cities with the most studies

• Baltimore, MD7 studies
• Charleston, SC4 studies
• New Haven, CT4 studies
• San Diego, CA4 studies
• Aurora, CO3 studies
• Providence, RI3 studies
• Los Angeles, CA3 studies

By state

• California8 studies
• Colorado4 studies
• Connecticut4 studies
• Maryland7 studies
• Michigan3 studies
• New York3 studies
• Pennsylvania3 studies
• Rhode Island3 studies
• South Carolina4 studies

Recently updated studies

From ClinicalTrials.gov, data retrieved Sep 29, 2026. Each study sets its own eligibility; the study team decides who can join.