What must a substance have to be classified as "scheduled"?

A substance is classified as "scheduled" primarily due to its potential for abuse. This classification system is part of the Controlled Substances Act, which categorizes drugs based on their potential for addiction, abuse, and medical use. Each schedule reflects different levels of restriction; for example, substances in Schedule I have a high potential for abuse and no accepted medical use, while those in lower schedules may have accepted medical uses but still carry potential for abuse.

While the absence of medical use, the necessity for a prescription, and restrictions regarding human usage can contribute to a substance's scheduling, the fundamental criterion that defines these classifications is the potential for abuse. This aspect is critical for law enforcement and public safety efforts, as it helps in controlling substances that could pose significant risks to individuals and communities. Thus, identifying the potential for abuse is essential for understanding how substances are regulated under the law.