What significant action did the DEA take on March 1, 2011?

On March 1, 2011, the Drug Enforcement Administration (DEA) took significant action by placing five synthetic cannabinoids into Schedule I of the Controlled Substances Act (CSA). This classification indicates that these substances are considered to have a high potential for abuse, no accepted medical use in treatment in the United States, and a lack of accepted safety for use under medical supervision.

This decision was particularly important due to the rising concerns regarding the abuse of synthetic cannabinoids, which are often marketed under names such as "Spice" or "K2." By scheduling these substances, the DEA aimed to address public health concerns and reduce the availability of these potentially harmful products on the market.