Glossary
Schedule I
The most restrictive federal drug schedule. Adult-use cannabis remained in Schedule I after the April 2026 medical rescheduling.
Schedule I designates substances treated as having no currently accepted medical use and a high potential for abuse. Cannabis sat entirely in Schedule I from 1970 until April 2026.
The 2026 action carved out state-legal medical cannabis and FDA-approved products. Everything else, including adult-use recreational cannabis, stayed.
Also written as: schedule 1.