What is the definition of "controlled substances"?

Controlled substances refer to medications and drugs that are regulated by law because of their potential for abuse and the risk of causing physical or psychological dependence. These substances are classified into schedules based on their accepted medical use and the severity of their potential for abuse, with Schedule I substances considered the most dangerous and having no accepted medical use, and Schedule V substances considered the least harmful.

This classification is important for regulatory purposes, as it ensures proper management and distribution of these drugs to minimize the risks associated with misuse. The other options, while related to medications, do not encompass the legal and regulatory framework required to define controlled substances. Non-prescription medications, supplements, and over-the-counter medications do not typically fall under the stringent regulations applied to drugs that are deemed controlled.