Data / Federal rules / 2025-22540
Schedules of Controlled Substances: Extension of Temporary Placement of MDMB-4en-PINACA in Schedule I of the Controlled Substances Act
The Drug Enforcement Administration published this final rule in the Federal Register on December 11, 2025. It took effect on December 12, 2025.
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What the agency says
The Administrator of the Drug Enforcement Administration is issuing this temporary scheduling order to extend the temporary schedule I status of MDMB-4en-PINACA. The schedule I status of MDMB- 4en-PINACA is in effect through December 12, 2025. This temporary order will extend the temporary scheduling of MDMB-4en-PINACA for one year, or until the permanent scheduling action for this substance is completed, whichever occurs first. As a result of this order, the regulatory controls and administrative, civil, and criminal sanctions applicable to schedule I controlled substances will continue to be imposed on persons who handle (manufacture, distribute, reverse distribute, import, export, engage in research, conduct instructional activities or chemical analysis with, or possess) or propose to handle MDMB-4en-PINACA.
Key facts
- Document number
- 2025-22540
- Type
- Final rule
- Action
- Temporary scheduling order; extension
- Agency
- Justice Department; Drug Enforcement Administration
- Published
- December 11, 2025
- Takes effect
- December 12, 2025
- Dates
- This temporary scheduling order, which extends schedule I control of MDMB-4en-PINACA covered by an order (88 FR 86040, December 12, 2023), is effective December 12, 2025, and expires on December 12, 2026. If DEA publishes a final rule making this scheduling action permanent, this order will expire on the effective date of that rule, if the effective date is earlier than December 12, 2026.
- Docket
- Docket No. DEA-1356
- Code of Federal Regulations
- 21 CFR 1308
- Pages
- 3
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Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.