Which drug is classified as a Schedule 1 substance?

Heroin is classified as a Schedule I substance because it has a high potential for abuse, lacks accepted medical use in treatment in the United States, and is deemed unsafe for use even under medical supervision. Schedule I drugs are considered to have no accepted medical application and a significant risk for addiction and dependency. This classification is significant in informing law enforcement and medical professionals about the risks associated with these substances and the legal implications of their possession and distribution.

Cocaine, amphetamine, and codeine, while they may also have potential for abuse, are classified under different schedules due to their acknowledged medical uses and lower levels of accepted risk when used appropriately under medical guidance. This differentiation helps to establish legal controls surrounding the prescribing and dispensing of these drugs in medical contexts.