Davis's Drug Guide
Controlled Substances Schedules
General
A controlled substance is any type of drug that the federal government has categorized as having significant potential for abuse or addiction. While controlled substances are regulated in both the United States (U.S.) and Canada, differences exist between the two countries with respect to scheduling and enforcement.
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Citation
Vallerand, April Hazard., and Cynthia A. Sanoski. "Controlled Substances Schedules." Davis's Drug Guide, 20th ed., F.A. Davis Company, 2026. www.drugguide.com/ddo/view/Davis-Drug-Guide/109520/all/Controlled_Substances_Schedules.
Vallerand AHA, Sanoski CAC. Controlled Substances Schedules. Davis's Drug Guide. F.A. Davis Company; 2026. https://www.drugguide.com/ddo/view/Davis-Drug-Guide/109520/all/Controlled_Substances_Schedules. Accessed July 3, 2026.
Vallerand, A. H., & Sanoski, C. A. (2026). Controlled Substances Schedules. In Davis's Drug Guide (20th ed.). F.A. Davis Company. https://www.drugguide.com/ddo/view/Davis-Drug-Guide/109520/all/Controlled_Substances_Schedules
Vallerand AHA, Sanoski CAC. Controlled Substances Schedules [Internet]. In: Davis's Drug Guide. F.A. Davis Company; 2026. [cited 2026 July 03]. Available from: https://www.drugguide.com/ddo/view/Davis-Drug-Guide/109520/all/Controlled_Substances_Schedules.
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