WASHINGTON, Dec. 16 (TNSFR) -- The U.S. Department of Justice Drug Enforcement Administration has issued an order to extend the temporary placement of four substances--4F-MDMB-BUTICA, ADB-4en-PINACA, 5F-EDMB-PICA and MMB-FUBICA--into Schedule I of the Controlled Substances Act (CSA).

The move is a response to the public health risk posed by these synthetic cannabinoids.

The original temporary scheduling order, which cited the imminent hazard these substances pose to pub . . .

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