The HALT Fentanyl Act schedules illicit fentanyl-related substances, known as fentanyl analogs, as Schedule I drugs under the Controlled Substances Act.

President Donald Trump signed bipartisan legislation that attempts to curb illegal flow of fentanyl into the U.S. by reclassifying opioid as Schedule 1 drug.

President Donald Trump has signed a bill into law that will permanently ban analogues of fentanyl—though it also contains provisions that would remove barriers to conducting research into the risks and benefits of marijuana,