S. 331: HALT Fentanyl Act
A Senate bill (S.) in the 119th U.S. Congress.
Overview
| Congress | 119th U.S. Congress (2025–2026) |
|---|---|
| Type | Senate bill (S.) |
| Originating chamber | Senate |
| Introduced | 2025-01-30 |
| Sponsor | Sen. Cassidy, Bill [R-LA] |
| Policy area | Crime and Law Enforcement |
| Cosponsors | 20 |
| Latest action | 2025-07-16 — Became Public Law No: 119-26. |
| Last updated | 2026-07-27 |
Summary
Official summary (Introduced in Senate, 2025-01-30):
Halt All Lethal Trafficking of Fentanyl Act or the HALT Fentanyl Act
This bill 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 bill, 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 bill establishes a new, alternative registration process for certain schedule I research.
The bill 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 bill 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.
Cosponsors (20)
| Name | Party / state |
|---|---|
| Martin Heinrich | D NM (original cosponsor) 2025-01-30 |
| Chuck Grassley | R IA (original cosponsor) 2025-01-30 |
| Roger Marshall | R KS (original cosponsor) 2025-01-30 |
| Todd Young | R IN (original cosponsor) 2025-01-30 |
| Steve Daines | R MT (original cosponsor) 2025-01-30 |
| Mike Rounds | R SD (original cosponsor) 2025-01-30 |
| Shelley Moore Capito | R WV (original cosponsor) 2025-01-30 |
| Eric Schmitt | R MO (original cosponsor) 2025-01-30 |
| John Kennedy | R LA (original cosponsor) 2025-01-30 |
| Ruben Gallego | D AZ (original cosponsor) 2025-01-30 |
| Margaret Wood Hassan | D NH (original cosponsor) 2025-01-30 |
| Catherine Cortez Masto | D NV (original cosponsor) 2025-01-30 |
| Jeanne Shaheen | D NH (original cosponsor) 2025-01-30 |
| Angus S. King, Jr. | I ME (original cosponsor) 2025-01-30 |
| Mark Kelly | D AZ (original cosponsor) 2025-01-30 |
| John Cornyn | R TX (original cosponsor) 2025-01-30 |
| Josh Hawley | R MO 2025-02-03 |
| Thom Tillis | R NC 2025-02-03 |
| Sen. Graham, Lindsey [R-SC] | R SC 2025-02-03 |
| Ted Cruz | R TX 2025-02-03 |
Full text & official record
The official bill text, section-by-section summary, amendments, committee reports, and the complete legislative timeline for S. 331 are published by Congress on congress.gov.
Frequently asked questions
What is S. 331?
S. 331 is a Senate bill (S.) introduced in the 119th U.S. Congress, originating in the Senate. Official title: HALT Fentanyl Act.
Where can I read the full bill text?
The full text, cosponsors, amendments, and legislative status for S. 331 are available on congress.gov.
Bill data: congress.gov API (official congressional records).