WASHINGTON, Jan. 13 -- Sen. Roger Marshall issued the following press release:

On Tuesday, U.S. Senator Roger Marshall, M.D. (R-Kansas), sent a follow-up letter to the Drug Enforcement Administration (DEA) reiterating his call for immediate action to schedule 7-hydroxymitragynine (7-OH) and related synthetic opioid products.

The letter follows Senator Marshall's October correspondence to DEA Administrator Terrence Cole, in which he urged the agency to act swiftly to emergency schedule 7-OH and related compounds that are being falsely marketed as "kratom extracts" despite their extreme potency and high risk of addiction.

In early December, the FDA seized approximately 73,000 illegal 7-OH products from three Kansas City-area warehouses aft...