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S. 331 · 119th Congress · Public Law 119-26

HALT Fentanyl Act

7 sections in the law, all of them in the bill as introduced.

Signed July 16, 2025 · Introduced January 30, 2025 in the Senate

Sponsor: Sen. Bill Cassidy (R-LA) · 31 cosponsors (6 D, 1 I, 24 R)

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Our check

Grade: Pending review

Not checked yet. No section of this law gets a verdict until a person approves the check.

Grade = share of sections a reviewed check found not described by the bill’s title or summary: Prime Cut 0%, Lean up to 5%, Marbled up to 20%, Pork Barrel over 20%. Pending review until a person has approved the check. How we decide

X-ray · every section, in order

  1. Sec. 1 Short title, in the bill as introduced
  2. Sec. 2 Class scheduling of fentanyl-related substances, in the bill as introduced
  3. Sec. 3 Registration requirements related to research, in the bill as introduced
  4. Sec. 4 Technical correction on controlled substances dispensing, in the bill as introduced
  5. Sec. 5 Rulemaking, in the bill as introduced
  6. Sec. 6 Penalties, in the bill as introduced
  7. Sec. 7 Applicability; other matters, in the bill as introduced

The yardstick

What the law says it does

A check compares every section with these texts, and nothing else.

Official title

To amend the Controlled Substances Act with respect to the scheduling of fentanyl-related substances, and for other purposes.

Official summary (Congressional Research Service) · as public law

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

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.

How it became law

  1. IntroducedJan 30
  2. CommitteeFeb 27
  3. House—
  4. SenateMar 14
  5. SignedJul 16

As introduced: To amend the Controlled Substances Act with respect to the scheduling of fentanyl-related substances, and for other purposes.

Key steps, cosponsors and text changes (20)

  1. Sponsor

    Sen. Bill Cassidy (R-LA)

  2. Original cosponsors

    Sen. Angus King (I-ME), Sen. Catherine Cortez Masto (D-NV), Sen. Chuck Grassley (R-IA), Sen. Eric Schmitt (R-MO), Sen. Jeanne Shaheen (D-NH), Sen. John Cornyn (R-TX), Sen. John Kennedy (R-LA), Sen. Margaret Hassan (D-NH), Sen. Mark Kelly (D-AZ), Sen. Martin Heinrich (D-NM), Sen. Mike Rounds (R-SD), Sen. Roger Marshall (R-KS), Sen. Ruben Gallego (D-AZ), Sen. Shelley Capito (R-WV), Sen. Steve Daines (R-MT), Sen. Todd Young (R-IN)

  3. SenateIntroduced in Senate

  4. Text: Introduced in Senate

    7 sections

  5. Cosponsors joined

    Sen. Josh Hawley (R-MO), Sen. Katie Britt (R-AL), Sen. Lindsey Graham (R-SC), Sen. Marsha Blackburn (R-TN), Sen. Mike Lee (R-UT), Sen. Ted Cruz (R-TX), Sen. Thomas Tillis (R-NC)

  6. Cosponsor joined

    Sen. Ashley Moody (R-FL)

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

  8. Text: Reported to Senate

    0 sections: 7 removed

  9. Cosponsors joined

    Sen. Dan Sullivan (R-AK), Sen. David McCormick (R-PA), Sen. James Justice (R-WV), Sen. Pete Ricketts (R-NE), Sen. Susan Collins (R-ME)

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

  11. Cosponsor joined

    Sen. Joni Ernst (R-IA)

  12. Cosponsor joined

    Sen. Cindy Hyde-Smith (R-MS)

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

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

  15. Text: Engrossed in Senate

    7 sections

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

  17. HousePresented to President.

  18. Text: Enrolled Bill

    7 sections, no changes

  19. Became Public Law No: 119-26.

  20. Signed by President.

Show every recorded step (44)

  1. Sponsor

    Sen. Bill Cassidy (R-LA)

  2. Original cosponsors

    Sen. Angus King (I-ME), Sen. Catherine Cortez Masto (D-NV), Sen. Chuck Grassley (R-IA), Sen. Eric Schmitt (R-MO), Sen. Jeanne Shaheen (D-NH), Sen. John Cornyn (R-TX), Sen. John Kennedy (R-LA), Sen. Margaret Hassan (D-NH), Sen. Mark Kelly (D-AZ), Sen. Martin Heinrich (D-NM), Sen. Mike Rounds (R-SD), Sen. Roger Marshall (R-KS), Sen. Ruben Gallego (D-AZ), Sen. Shelley Capito (R-WV), Sen. Steve Daines (R-MT), Sen. Todd Young (R-IN)

  3. SenateRead twice and referred to the Committee on the Judiciary.

  4. SenateIntroduced in Senate

  5. Text: Introduced in Senate

    7 sections

  6. Cosponsors joined

    Sen. Josh Hawley (R-MO), Sen. Katie Britt (R-AL), Sen. Lindsey Graham (R-SC), Sen. Marsha Blackburn (R-TN), Sen. Mike Lee (R-UT), Sen. Ted Cruz (R-TX), Sen. Thomas Tillis (R-NC)

  7. Cosponsor joined

    Sen. Ashley Moody (R-FL)

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

  9. SenatePlaced on Senate Legislative Calendar under General Orders. Calendar No. 18.

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

  11. Text: Reported to Senate

    0 sections: 7 removed

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

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

  14. SenateMotion to proceed to measure considered in Senate. (CR S1521)

  15. Cosponsors joined

    Sen. Dan Sullivan (R-AK), Sen. David McCormick (R-PA), Sen. James Justice (R-WV), Sen. Pete Ricketts (R-NE), Sen. Susan Collins (R-ME)

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

  17. SenateMotion to proceed to measure considered in Senate. (CR S1596)

  18. Cosponsor joined

    Sen. Joni Ernst (R-IA)

  19. SenateMeasure laid before Senate by motion.

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

  21. SenateMotion to proceed to measure considered in Senate. (CR S1623)

  22. Cosponsor joined

    Sen. Cindy Hyde-Smith (R-MS)

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

  24. SenateConsidered by Senate. (consideration: CR S1659)

  25. SenateConsidered by Senate. (consideration: CR S1735)

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

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

  28. SenateThe committee substitute agreed to by Unanimous Consent.

  29. SenateConsidered by Senate. (consideration: CR S1762-1765)

  30. Text: Engrossed in Senate

    7 sections

  31. HouseReceived in the House.

  32. HouseRules 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.

  33. HouseRule H. Res. 489 passed House.

  34. HousePOSTPONED 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.

  35. HouseThe previous question was ordered pursuant to the rule.

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

  37. HouseRule 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.

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

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

  40. HouseConsidered as unfinished business. (consideration: CR H2806)

  41. HousePresented to President.

  42. Text: Enrolled Bill

    7 sections, no changes

  43. Became Public Law No: 119-26.

  44. Signed by President.

Source: GovInfo bill status and text versions. 31 cosponsors.

Every section

All 7 sections, in order

From the enrolled bill text on GovInfo. Read any section in full on Congress.gov.

  1. Sec. 1Short title
  2. Sec. 2Class scheduling of fentanyl-related substances
  3. Sec. 3Registration requirements related to research
  4. Sec. 4Technical correction on controlled substances dispensing
  5. Sec. 5Rulemaking
  6. Sec. 6Penalties
  7. Sec. 7Applicability; other matters

Sponsor and cosponsors

Show all 32 members, by last name

Sponsor: Sen. Bill Cassidy (R-LA)

  • Sen. Marsha Blackburn (R-TN)
  • Sen. Katie Britt (R-AL)
  • Sen. Shelley Capito (R-WV)
  • Sen. Susan Collins (R-ME)
  • Sen. John Cornyn (R-TX)
  • Sen. Catherine Cortez Masto (D-NV)
  • Sen. Ted Cruz (R-TX)
  • Sen. Steve Daines (R-MT)
  • Sen. Joni Ernst (R-IA)
  • Sen. Ruben Gallego (D-AZ)
  • Sen. Lindsey Graham (R-SC)
  • Sen. Chuck Grassley (R-IA)
  • Sen. Maggie Hassan (D-NH)
  • Sen. Josh Hawley (R-MO)
  • Sen. Martin Heinrich (D-NM)
  • Sen. Cindy Hyde-Smith (R-MS)
  • Sen. James Justice (R-WV)
  • Sen. Mark Kelly (D-AZ)
  • Sen. John Kennedy (R-LA)
  • Sen. Angus King (I-ME)
  • Sen. Mike Lee (R-UT)
  • Sen. Roger Marshall (R-KS)
  • Sen. David McCormick (R-PA)
  • Sen. Ashley Moody (R-FL)
  • Sen. Pete Ricketts (R-NE)
  • Sen. Mike Rounds (R-SD)
  • Sen. Eric Schmitt (R-MO)
  • Sen. Jeanne Shaheen (D-NH)
  • Sen. Dan Sullivan (R-AK)
  • Sen. Thomas Tillis (R-NC)
  • Sen. Todd Young (R-IN)
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Sources: bill text and status, GovInfo (Enrolled Bill) · Official summary, Congressional Research Service · Congress.gov, as of November 1, 2026. US government works are in the public domain · This bill on Congress.gov (opens in new tab)