S. 331 119th Congress Senate

HALT Fentanyl Act

Official title: A bill to amend the Controlled Substances Act with respect to the scheduling of fentanyl-related substances, and for other purposes.

Introduced: January 30, 2025 Introduced by: Bill Cassidy Republican · Louisiana See on congress.gov

Crime and Law Enforcement Administrative law and regulatory proceduresDepartment of JusticeDrug trafficking and controlled substancesLicensing and registrationsResearch administration and funding

Everywhere this bill has been 37 steps

Introduced

In committee

Reported out

Passed House

Passed Senate

To President

Became law

Jul 16, 2025

Became Public Law No: 119-26.

Jul 16, 2025

Signed by President.

Jul 8, 2025

Presented to President.

Jun 12, 2025

On passage Passed by the Yeas and Nays: 321 - 104 (Roll no. 166). (text: 6/11/2025 CR H2625-2627)

Jun 12, 2025

Motion to reconsider laid on the table Agreed to without objection.

Jun 12, 2025

Considered as unfinished business. (consideration: CR H2806)

Jun 11, 2025

POSTPONED PROCEEDINGS - At the conclusion of debate on S. 331, the Chair put the question on passage of the bill and by voice vote, announced that the ayes had prevailed. Mr. Pallone demanded the yeas and nays and the Chair postponed further proceedings until a time to be announced.

Jun 11, 2025

The previous question was ordered pursuant to the rule.

Jun 11, 2025

DEBATE - The House proceeded with one hour of debate on S. 331.

Jun 11, 2025

Rule provides for consideration of H.R. 884, H.R. 2056, H.R. 2096 and S. 331. The resolution provides for consideration of H.R. 884, H.R. 2056, H.R. 2096, and S. 331 under a closed rule with one hour of general debate for each bill. The resolution provides for one motion to recommit on H.R. 884, H.R. 2056, and H.R. 2096, and one motion to commit on S. 331.

Jun 11, 2025

Considered under the provisions of rule H. Res. 489. (consideration: CR H2625-2633)

Jun 10, 2025

Rule H. Res. 489 passed House.

Jun 9, 2025

Rules Committee Resolution H. Res. 489 Reported to House. Rule provides for consideration of H.R. 884, H.R. 2056, H.R. 2096 and S. 331. The resolution provides for consideration of H.R. 884, H.R. 2056, H.R. 2096, and S. 331 under a closed rule with one hour of general debate for each bill. The resolution provides for one motion to recommit on H.R. 884, H.R. 2056, and H.R. 2096, and one motion to commit on S. 331.

Mar 18, 2025

Received in the House.

Mar 18, 2025

Held at the desk.

Mar 14, 2025

Message on Senate action sent to the House.

Mar 14, 2025

Passed Senate with an amendment by Yea-Nay Vote. 84 - 16. Record Vote Number: 127.

Mar 14, 2025

Passed/agreed to in Senate: Passed Senate with an amendment by Yea-Nay Vote. 84 - 16. Record Vote Number: 127.

Mar 14, 2025

The committee substitute agreed to by Unanimous Consent.

Mar 14, 2025

Considered by Senate. (consideration: CR S1762-1765)

Mar 13, 2025

Considered by Senate. (consideration: CR S1735)

Mar 13, 2025

Cloture on the measure invoked in Senate by Yea-Nay Vote. 84 - 15. Record Vote Number: 124. (CR S1735)

Mar 11, 2025

Cloture motion on the measure presented in Senate. (CR S1659)

Mar 11, 2025

Considered by Senate. (consideration: CR S1659)

Mar 10, 2025

Measure laid before Senate by motion.

Mar 10, 2025

Motion to proceed to consideration of measure agreed to in Senate by Voice Vote. (consideration: CR S1623)

Mar 10, 2025

Motion to proceed to measure considered in Senate. (CR S1623)

Mar 6, 2025

Cloture on the motion to proceed to the measure invoked in Senate by Yea-Nay Vote. 82 - 12. Record Vote Number: 110. (CR S1596)

Mar 6, 2025

Motion to proceed to measure considered in Senate. (CR S1596)

Mar 5, 2025

Motion to proceed to measure considered in Senate. (CR S1521)

Mar 4, 2025

Cloture motion on the motion to proceed to the measure presented in Senate. (CR S1488)

Mar 4, 2025

Motion to proceed to consideration of measure made in Senate. (CR S1488)

Mar 3, 2025

Placed on Senate Legislative Calendar under General Orders. Calendar No. 18.

Mar 3, 2025

Committee on the Judiciary. Reported by Senator Grassley with an amendment in the nature of a substitute. Without written report.

Feb 27, 2025

Committee on the Judiciary. Ordered to be reported with an amendment in the nature of a substitute favorably.

Jan 30, 2025

Read twice and referred to the Committee on the Judiciary.

Jan 30, 2025

Introduced in Senate

Votes taken on this bill 5

Date	Chamber	What was voted on	Result	Yes–No
Jun 12, 2025	House · vote #166	On Passage	Passed	321–104	See who voted →
Mar 14, 2025	Senate · vote #127	On Passage of the Bill S. 331	Passed	84–16	See who voted →
Mar 13, 2025	Senate · vote #124	On the Cloture Motion S. 331	Agreed To	84–15	See who voted →
Mar 6, 2025	Senate · vote #110	On Cloture on the Motion to Proceed S. 331	Agreed To	82–12	See who voted →
Jun 16, 1999	Senate · vote #169	On Passage of the Bill S. 331	Passed	99–0	See who voted →

Amendments to this bill 35

Amendments propose changes to this bill. Members vote on amendments separately before the final bill vote. An agreed amendment becomes part of the bill; a failed amendment does not.

Amendment	Sponsor	Purpose	Status	Latest action
SAMDT 1,237	Grassley, Chuck	To improve the bill.	No recorded outcome	Mar 14, 2025
SAMDT 1,265	Thune, John	–	No recorded outcome	–
SAMDT 1,264	Thune, John	–	No recorded outcome	–
SAMDT 1,263	Thune, John	–	No recorded outcome	–
SAMDT 1,262	Thune, John	–	No recorded outcome	–
SAMDT 1,261	Thune, John	–	No recorded outcome	–
SAMDT 1,260	Cornyn, John	–	No recorded outcome	–
SAMDT 1,259	Sullivan, Dan	–	No recorded outcome	–
SAMDT 1,258	Warnock, Raphael G.	–	No recorded outcome	–
SAMDT 1,257	Hirono, Mazie K.	–	No recorded outcome	–
SAMDT 1,256	Hawley, Josh	–	No recorded outcome	–
SAMDT 1,255	Hawley, Josh	–	No recorded outcome	–
SAMDT 1,254	Durbin, Richard J.	–	No recorded outcome	–
SAMDT 1,253	Durbin, Richard J.	–	No recorded outcome	–
SAMDT 1,252	Durbin, Richard J.	–	No recorded outcome	–
SAMDT 1,251	Durbin, Richard J.	–	No recorded outcome	–
SAMDT 1,250	Durbin, Richard J.	–	No recorded outcome	–
SAMDT 1,249	Warnock, Raphael G.	–	No recorded outcome	–
SAMDT 1,248	Hickenlooper, John W.	–	No recorded outcome	–
SAMDT 1,247	Risch, James E.	–	No recorded outcome	–
SAMDT 1,246	Merkley, Jeff	–	No recorded outcome	–
SAMDT 1,245	Merkley, Jeff	–	No recorded outcome	–
SAMDT 1,244	Scott, Rick	–	No recorded outcome	–
SAMDT 1,243	Coons, Christopher A.	–	No recorded outcome	–
SAMDT 1,242	Coons, Christopher A.	–	No recorded outcome	–
SAMDT 1,241	Cortez Masto, Catherine	–	No recorded outcome	–
SAMDT 1,240	Cortez Masto, Catherine	–	No recorded outcome	–
SAMDT 1,239	Blunt Rochester, Lisa	–	No recorded outcome	–
SAMDT 1,238	Luján, Ben Ray	–	No recorded outcome	–
SAMDT 1,236	Booker, Cory A.	–	No recorded outcome	–
SAMDT 1,235	Booker, Cory A.	–	No recorded outcome	–
SAMDT 1,234	Booker, Cory A.	–	No recorded outcome	–
SAMDT 1,233	Booker, Cory A.	–	No recorded outcome	–
SAMDT 1,232	Hassan, Margaret Wood	–	No recorded outcome	–
SAMDT 1,231	Welch, Peter	–	No recorded outcome	–

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Latest action July 16, 2025

Became Public Law No: 119-26.

Plain-English 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.

Hearings & markups 4

H.R. 884 – To prohibit individuals who are not citizens of the United States from voting in elections in the District o…
Meeting Jun 9, 2025 · 4:00 PM EDT · Rules Committee
Business meeting to consider S.331, to amend the Controlled Substances Act with respect to the scheduling of fentanyl-r…
Meeting Feb 27, 2025 · 9:00 AM EST · Judiciary Committee
Business meeting to consider S.331, to amend the Controlled Substances Act with respect to the scheduling of fentanyl-r…
Meeting Feb 20, 2025 · 10:15 AM EST · Judiciary Committee
Business meeting to consider S.331, to amend the Controlled Substances Act with respect to the scheduling of fentanyl-r…
Meeting Feb 13, 2025 · 9:00 AM EST · Judiciary Committee

Related & companion bills 2

Bill text 5 versions

Engrossed in Senate Formatted Text PDF Formatted XML
Enrolled Bill Formatted Text PDF Formatted XML United States Legislative Markup
Introduced in Senate Formatted Text PDF Formatted XML
Public Law Formatted Text PDF United States Legislative Markup
Reported to Senate Formatted Text PDF Formatted XML

Source documents hosted by congress.gov.

Committees of jurisdiction 1

Judiciary Committee
Senate

Lobbying activity 59

Registered lobbyists who named this bill in their disclosure filings. Source: federal Lobbying Disclosure Act filings.

ASSOCIATION OF AMERICAN MEDICAL COLLEGES
for ASSOCIATION OF AMERICAN MEDICAL COLLEGES · District of Columbia · 3rd Quarter 2026 (July 1 - Sep 30)
NATIONAL FRATERNAL ORDER OF POLICE
for NATIONAL FRATERNAL ORDER OF POLICE · District of Columbia · 1st Quarter 2026 (Jan 1 - Mar 31)
NATIONAL FRATERNAL ORDER OF POLICE
for NATIONAL FRATERNAL ORDER OF POLICE · District of Columbia · 4th Quarter 2025 (Oct 1 - Dec 31)
NATIONAL FRATERNAL ORDER OF POLICE
for NATIONAL FRATERNAL ORDER OF POLICE · District of Columbia · 3rd Quarter 2025 (July 1 - Sep 30)
NATIONAL FRATERNAL ORDER OF POLICE
for NATIONAL FRATERNAL ORDER OF POLICE · District of Columbia · 2nd Quarter 2025 (Apr 1 - June 30)
NATIONAL FRATERNAL ORDER OF POLICE
for NATIONAL FRATERNAL ORDER OF POLICE · District of Columbia · 1st Quarter 2025 (Jan 1 - Mar 31)

Bodies those filers lobbied

HOUSE OF REPRESENTATIVES
57 filings
SENATE
57 filings
White House Office
31 filings
Justice, Dept of (DOJ)
30 filings
Homeland Security, Dept of (DHS)
29 filings
Labor, Dept of (DOL)
21 filings
Health & Human Services, Dept of (HHS)
14 filings
Office of Management & Budget (OMB)
13 filings

A filing lists the bills it worked on and the parts of government it contacted in separate sections, so these are the bodies those filers named anywhere in the filing, not a per-bill breakdown.

See all 59 filings →

Cosponsors 31