The Drug Enforcement Administration is temporarily placing mitragynine pseudoindoxyl, MGM-15, and MGM-16 in Schedule I of the Controlled Substances Act. The temporary scheduling order is effective until August 26, 2028.
The agency determined that controlling these substances is necessary to avoid an imminent hazard to public safety. The order imposes criminal sanctions on the manufacture, distribution, and possession of these substances nationwide.
The DEA Toxicology Testing Program identified mitragynine pseudoindoxyl in at least 56 overdose cases between February 2025 and May 2026. Forty-eight of the 56 overdose cases involving mitragynine pseudoindoxyl were fatal events.
Preclinical data demonstrate that mitragynine pseudoindoxyl is about 100 times more potent than mitragynine at the mu-opioid receptor. Preclinical studies show MGM-16 is about 240 times more potent than morphine in animal models. The Assistant Secretary for Health of HHS stated there were no investigational new drug applications or approved new drug applications for mitragynine pseudoindoxyl, MGM-15, and MGM-16 as of January 20, 2026.
Why It Matters
The scheduling action follows a documented increase in kratom-related reports to poison centers, which rose from 258 in 2015 to 3,434 in 2025. United States poison centers received 1,690 exposure calls involving kratom from January to July 2025. An estimated 1.9 million people reported past-year kratom use in 2022.
Timeline
The National Forensic Laboratory Information System database recorded 19 reports of mitragynine pseudoindoxyl as of June 23, 2026. The 19 reports of mitragynine pseudoindoxyl included 15 from Arkansas, 1 from New York, 1 from Ohio, and 2 from Wyoming. The Justice Department published a rule titled "Schedules of Controlled Substances: Temporary Placement of O-Desmethyltramadol in Schedule I" on 2026-08-12. The Drug Enforcement Administration is temporarily placing mitragynine pseudoindoxyl, MGM-15, and MGM-16 in Schedule I of the Controlled Substances Act on August 24, 2026.
What's New
The Drug Enforcement Administration is a United States federal law enforcement agency.
forum Comments (0)
No comments yet. Be the first to comment.