The Controlled Substances Act: schedules I–V and the Analogue Act
Explains how U.S. federal law classifies drugs into five schedules, what decides a drug's schedule, why Schedule I is different from the rest, and how the Federal Analogue Act handles designer drugs.
Where this fitsConnects to 3 · Unlocks 1
- Connects to
- The course lens: biopsychosocial, and no 'chemical imbalance' — The CSA is the history piece from the course's first lecture.
- Safety: therapeutic index, dosing across species, allergy and polypharmacy — Schedules are supposed to reflect abuse potential and safety.
- Substance use disorder: dependence is not addiction — Abuse and dependence potential are scheduling criteria.
- Unlocks
- The War on Drugs, decriminalization and legalization — Schedules are the legal backbone of the War on Drugs.
Walk through
Five schedules
Under the CSA, placement depends on accepted medical use in the U.S., relative abuse potential and likelihood of addiction — “in theory”. The full list is published every year in Title 21 C.F.R. §§ 1308.11–1308.15.
Analogy and worked example
Analogy: Schedules are like age ratings for films, except Schedule I isn't the strictest rating — it's 'not allowed in theaters at all'. II through V are all showable, with fewer restrictions as you go down; Schedule I has no legitimate showing.
Why can a doctor prescribe cocaine (for some surgical procedures) but not psilocybin, even though many people would rate cocaine as riskier?
- Cocaine is Schedule II: high abuse potential but an accepted medical use (topical anesthetic).
Tip: the ← and → keys move through the lesson.
Full lesson: History and reasoning about drug effects