On Passage of the Bill — S. 331, as amended
HALT Fentanyl Act
In plain language
- Senate bill in the 119th Congress.
- Permanently places fentanyl-related substances as a class into schedule I of the Controlled Substances Act.
- Senate passed it on Mar 14, 2025 (substantive).
Official summary (Congressional Research Service)
Halt All Lethal Trafficking of Fentanyl Act or the HALT Fentanyl Act This act permanently places fentanyl-related substances as a class into schedule I of the Controlled Substances Act. A schedule I controlled substance is a drug, substance, or chemical that has a high potential for abuse; has no currently accepted medical value; and is subject to regulatory controls and administrative, civil, and criminal penalties under the Controlled Substances Act. Under the act, offenses involving fentanyl-related substances are triggered by the same quantity thresholds and subject to the same penalties as offenses involving fentanyl analogues (e.g., offenses involving 100 grams or more trigger a 10-year mandatory minimum prison term). Additionally, the act establishes a new, alternative registration process for certain schedule I research. The act also makes several other changes to registration requirements for conducting research with controlled substances, including permitting a single registration for related research sites in certain circumstances, waiving the requirement for a new inspection in certain situations, and allowing a registered researcher to perform certain manufacturing activities with small quantities of a substance without obtaining a manufacturing registration. Finally, the act expresses the sense that Congress agrees with the interpretation of the Controlled Substances Act in United States v. McCray , a 2018 case decided by the U.S. District Court for the Western District of New York. In that case, the court held that butyryl fentanyl, a controlled substance, can be considered an analogue of fentanyl even though, under the Controlled Substances Act, the term controlled substance analogue specifically excludes a controlled substance.
Roll-call breakdown
Democrat: 30 · Independent: 1 · Republican: 53
Democrat: 15 · Independent: 1
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How each member voted (100)
Yea (84)
- Amy Klobuchar (Democrat–MN)
- Andy Kim (Democrat–NJ)
- Angus S. King, Jr. (Independent–ME)
- Ashley Moody (Republican–FL)
- Ben Ray Luján (Democrat–NM)
- Bernie Moreno (Republican–OH)
- Bill Cassidy (Republican–LA)
- Bill Hagerty (Republican–TN)
- Brian Schatz (Democrat–HI)
- Catherine Cortez Masto (Democrat–NV)
- Charles E. Schumer (Democrat–NY)
- Christopher A. Coons (Democrat–DE)
- Chuck Grassley (Republican–IA)
- Cindy Hyde-Smith (Republican–MS)
- Cynthia M. Lummis (Republican–WY)
- Dan Sullivan (Republican–AK)
- David McCormick (Republican–PA)
- Deb Fischer (Republican–NE)
- Elissa Slotkin (Democrat–MI)
- Eric Schmitt (Republican–MO)
- Gary C. Peters (Democrat–MI)
- Jack Reed (Democrat–RI)
- Jacky Rosen (Democrat–NV)
- James C. Justice (Republican–WV)
- James E. Risch (Republican–ID)
- James Lankford (Republican–OK)
- Jeanne Shaheen (Democrat–NH)
- Jerry Moran (Republican–KS)
- Jim Banks (Republican–IN)
- John Barrasso (Republican–WY)
- John Boozman (Republican–AR)
- John Cornyn (Republican–TX)
- John Fetterman (Democrat–PA)
- John Hoeven (Republican–ND)
- John Kennedy (Republican–LA)
- John R. Curtis (Republican–UT)
- John Thune (Republican–SD)
- John W. Hickenlooper (Democrat–CO)
- Jon Husted (Republican–OH)
- Jon Ossoff (Democrat–GA)
- Joni Ernst (Republican–IA)
- Josh Hawley (Republican–MO)
- Katie Boyd Britt (Republican–AL)
- Kevin Cramer (Republican–ND)
- Kirsten E. Gillibrand (Democrat–NY)
- Lindsey Graham (Republican–SC)
- Lisa Murkowski (Republican–AK)
- Margaret Wood Hassan (Democrat–NH)
- Maria Cantwell (Democrat–WA)
- Mark Kelly (Democrat–AZ)
- Mark R. Warner (Democrat–VA)
- Markwayne Mullin (Republican–OK)
- Marsha Blackburn (Republican–TN)
- Martin Heinrich (Democrat–NM)
- Michael F. Bennet (Democrat–CO)
- Mike Crapo (Republican–ID)
- Mike Lee (Republican–UT)
- Mike Rounds (Republican–SD)
- Mitch McConnell (Republican–KY)
- Patty Murray (Democrat–WA)
- Pete Ricketts (Republican–NE)
- Rand Paul (Republican–KY)
- Richard Blumenthal (Democrat–CT)
- Richard J. Durbin (Democrat–IL)
- Rick Scott (Republican–FL)
- Roger F. Wicker (Republican–MS)
- Roger Marshall (Republican–KS)
- Ron Johnson (Republican–WI)
- Ruben Gallego (Democrat–AZ)
- Sheldon Whitehouse (Democrat–RI)
- Shelley Moore Capito (Republican–WV)
- Steve Daines (Republican–MT)
- Susan M. Collins (Republican–ME)
- Tammy Baldwin (Democrat–WI)
- Ted Budd (Republican–NC)
- Ted Cruz (Republican–TX)
- Thom Tillis (Republican–NC)
- Tim Kaine (Democrat–VA)
- Tim Scott (Republican–SC)
- Tim Sheehy (Republican–MT)
- Tina Smith (Democrat–MN)
- Todd Young (Republican–IN)
- Tom Cotton (Republican–AR)
- Tommy Tuberville (Republican–AL)
Nay (16)
- Adam B. Schiff (Democrat–CA)
- Alex Padilla (Democrat–CA)
- Angela D. Alsobrooks (Democrat–MD)
- Bernard Sanders (Independent–VT)
- Chris Van Hollen (Democrat–MD)
- Christopher Murphy (Democrat–CT)
- Cory A. Booker (Democrat–NJ)
- Edward J. Markey (Democrat–MA)
- Elizabeth Warren (Democrat–MA)
- Jeff Merkley (Democrat–OR)
- Lisa Blunt Rochester (Democrat–DE)
- Mazie K. Hirono (Democrat–HI)
- Peter Welch (Democrat–VT)
- Raphael G. Warnock (Democrat–GA)
- Ron Wyden (Democrat–OR)
- Tammy Duckworth (Democrat–IL)
Party labels reflect each member’s most recent affiliation on record.