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S331: HALT Fentanyl Act
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S331: HALT Fentanyl Act

119th Congress (2025–2027) · Senate bill · Sponsor: Sen. Cassidy, Bill [R-LA]


Key facts

Item Detail
Roll-call votes 4
Chamber House and Senate
Latest vote 2025-06-12: Passed
Latest action 2025-07-16: Became Public Law No: 119-26.
Policy area Crime and Law Enforcement
Official record Congress.gov

What the bill does

Halt All Lethal Trafficking of Fentanyl Act or the HALT Fentanyl ActThis 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, includingpermitting a single registration for related research sites in certain circumstances,waiving the requirement for a new inspection in certain situations, andallowing 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…

Subjects: Administrative law and regulatory procedures, Department of Justice, Drug trafficking and controlled substances, Licensing and registrations, Research administration and funding


Roll-call votes on S331 (119th Congress)

Every recorded vote on this bill, newest first, with a link to the official tally. Member-by-member positions are on each member’s profile.

Date Chamber Question Result Yea Nay Not voting Record
2025-06-12 House Yea-and-Nay Passed 317 104 7 Official tally
2025-03-14 Senate On Passage of the Bill S. 331 Bill Passed (84-16) 82 16 0 Official tally
2025-03-13 Senate On the Cloture Motion S. 331 Cloture Motion Agreed to (84-15, 3/5 majority required) 82 15 1 Official tally
2025-03-06 Senate On Cloture on the Motion to Proceed S. 331 Cloture on the Motion to Proceed Agreed to (82-12, 3/5 majority required) 80 12 6 Official tally

Frequently asked

What is S331 in the 119th Congress?

S331 (HALT Fentanyl Act) was introduced in the 119th Congress (2025–2027) by Sen. Cassidy, Bill [R-LA].

What is the latest action on S331?

On 2025-07-16: Became Public Law No: 119-26.

How many roll-call votes were held on S331?

4 recorded votes in the 119th Congress. The most recent, on 2025-06-12, was "Yea-and-Nay": Passed.