Final answer:
Marijuana is classified as a Schedule I drug according to U.S. federal regulations, indicating high addiction potential and severe health risks with no recognized medical applications.
Explanation:
Marijuana is classified as a Schedule I drug according to U.S. federal regulations. Schedule I drugs are considered to have the highest addiction potential, severe health risks, and no recognized medical applications. Despite state-level legalization for medical or recreational use in some areas, federal law still categorizes marijuana as a Schedule I substance.
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