Which statement is true about Schedule I drugs in U.S. federal law?

• A. Schedule I drugs have high abuse potential, no accepted medical use in the U.S., and a lack of accepted safety under medical supervision.
• B. Schedule I drugs have accepted medical uses but high abuse potential.
• C. Schedule I drugs are low risk and allowed for research with no supervision.
• D. Schedule I includes marijuana with no research restrictions.

Answer: (A)

Schedule I drugs are defined as having the highest potential for abuse, no accepted medical use in the United States, and a lack of accepted safety for use under medical supervision. This combination is why the statement is true: these drugs are not legally prescribed or approved for medical treatment at the federal level, and they are tightly regulated due to safety concerns. For example, many substances commonly cited as Schedule I, like heroin or certain hallucinogens, are not accepted for medical use and are considered unsafe under medical supervision.

Marijuana is federally listed as Schedule I, but that does not mean there are no research restrictions. Research requires special licenses and rigorous oversight, so the claim of “no research restrictions” is inaccurate. The other choices are inconsistent with Schedule I criteria: one asserts medical uses exist, another describes low risk with open research, and another claims marijuana has no research restrictions.