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              Congressional                                               ______
            *.Research Service
                ~nforming the legislative d bate since 1914




An Expiration Date for Temporary Control of

Fentanyl Analogues



Updated April 6, 2021
In February 2020, the Temporary Reauthorization and Study of the Emergency Scheduling of Fentanyl
Analogues Act (the Act) temporarily placed certain fentanyl analogues-i.e., compounds chemically
related to the powerful synthetic opioid fentanyl-on Schedule I of the Controlled Substances Act (CSA).
The temporary scheduling of fentanyl analogues under the Act is slated to expire on May 6, 2021. In light
of the approaching expiration, Congress may be interested in the legal issues related to the scheduling of
fentanyl analogues. This Sidebar provides an overview of the legal framework that applies to fentanyl and
its analogues, key considerations involved in scheduling fentanyl analogues, and options for pursuing
scheduling via legislation.

The   CSA and Controlled Substance Regulation

The CSA  regulates drugs and other substances-whether medical or recreational, legally or illicitly
distributed-that pose a risk of abuse and dependence. Substances become subject to the CSA through
classification into one of five lists, known as Schedules I through V. Controlled substances in Schedule I
are subject to the most stringent controls, reflecting a finding that a substance has a high potential for
abuse and no currently accepted medical use. Substances in Schedules II through V have accepted
medical uses and have been deemed to pose progressively lower risks of abuse and dependence.
Fentanyl itself is in Schedule II, as it has recognized medical uses such as pain management for cancer
patients and individuals on ventilators. Multiple nonpharmaceutical substances chemically related to
fentanyl are controlled in Schedule I. By contrast, cough medicines containing limited amounts of another
opiate, codeine, are in Schedule V. (Many other prescription drugs are not controlled substances subject to
the CSA.)
A substance not specifically designated for control in Schedules I through V may still be subject to the
CSA  as a controlled substance analogue. A controlled substance analogue is a substance not otherwise
approved by the Food and Drug Administration (FDA) or scheduled under the CSA that has (1) a
chemical structure substantially similar to that of a controlled substance in Schedule I or II, or (2) an
actual or intended effect that is substantially similar to or greater than the stimulant, depressant, or
hallucinogenic effect . . . of a controlled substance in schedule I or II. A substance that meets those
criteria and is intended for human consumption is treated as a controlled substance in Schedule I.
                                                                 Congressional Research Service
                                                                   https://crsreports.congress.gov
                                                                                      LSB10404

CRS Legal Sidebar
Prepared for Members and
Committees of Congress

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