Controlled Substance: Understanding the Legal Complexities Around Abused substances All abused substances in the United States are categorized into one of five schedules (I, II, III, IV, or V) by the Drug Enforcement Administration (DEA). This scheduling determines how abused substances are regulated under federal law. Schedule I is reserved for substances that have no accepted m... https://www.coherentmarketinsights.com/market-insight/controlled-substance-market-6201#:~:text=Global%20controlled%20substance%20market%20is,hallucinogens%2C%20anabolic%20steroids%20and%20others.