Reference
Legal status
This page explains the law in general terms. It is not legal advice, it goes out of date, and you should not rely on it for a decision about your own conduct.
Last updated August 2026
Federal scheduling
LSD, psilocybin, MDMA, DMT, ibogaine and mescaline are Schedule I under the federal Controlled Substances Act: no accepted medical use and a high potential for abuse. Ketamine is Schedule III, and esketamine is an approved prescription medicine.
Schedule I does not prohibit research. It makes it slower: investigators need a DEA registration and the substance must come from an approved supplier, which is much of why this field moved as slowly as it did for fifty years.
Approval changes a schedule, not the structure
If a Phase 3 program succeeds and the FDA approves a psychedelic medicine, that specific formulation is rescheduled for that specific use. It does not legalise the substance generally, and it does not make anything bought elsewhere lawful.
The two state programs
Oregon and Colorado license psilocybin services, where an adult may take psilocybin with a trained facilitator at a licensed center. These are state programs only: they remain unlawful federally, they are not medical treatment, and they are small. Oregon’s has contracted, with a substantial share of its service centers closed.
Decriminalisation in various cities changes enforcement priority, not legality.
What this means practically
For most people in most of the United States, a registered clinical trial is the only lawful route to these substances, and it costs nothing.