S. 331 · 119th Congress · Senate
HALT Fentanyl Act
Introduced 2025-01-30 · Sponsored by Sen. Cassidy, Bill [R-LA] (R-LA) · Last updated 2026-03-31
Last action (2025-07-16): Became Public Law No: 119-26.
Summary
Permanently classifies all fentanyl-related substances as Schedule I controlled substances, closing a loophole where new fentanyl analogues could dodge enforcement while temporary scheduling orders were renewed. Penalties for trafficking fentanyl analogues now match those for fentanyl itself, with the same quantity thresholds and sentencing rules. The law also creates a process for researchers to apply for access to study these substances.
The Good
Permanently schedules fentanyl analogues, closing a loophole
Fentanyl-related substances had been classified as Schedule I only through temporary orders that required periodic renewal. This law makes the classification permanent, preventing gaps in enforcement when temporary scheduling authority expires.
Addresses the leading cause of overdose deaths in the US
Synthetic opioids, primarily fentanyl and its analogues, account for over 70,000 deaths annually. Class-wide scheduling means law enforcement does not need to prove each new chemical variation is individually controlled before pursuing trafficking cases.
Provides clearer prosecution tools for law enforcement
Without permanent scheduling, prosecutors faced uncertainty about whether specific fentanyl analogues were legally controlled at the time of arrest. Permanent class-wide scheduling eliminates this ambiguity in federal cases.
The Bad
Mass scheduling criminalizes substances before individual assessment
Class-wide scheduling means any chemical structurally related to fentanyl is automatically Schedule I, even if it has legitimate medical applications. Researchers argue this approach blocks the development of safer pain management alternatives that share fentanyl's chemical backbone but lack its addiction profile.
Criminal penalties have not historically reduced drug supply
Decades of scheduling and mandatory minimums for other drugs have not significantly reduced supply or use. Drug policy researchers point to treatment-based approaches as more effective at reducing overdose deaths than supply-side enforcement alone.
Could impose harsh sentences on low-level offenders
Because fentanyl is active in microgram quantities, even small amounts trigger severe mandatory minimum sentences. A person carrying what would be a personal-use quantity of other drugs could face trafficking-level penalties with fentanyl, disproportionately affecting users rather than suppliers.
Vote Record
House, 2025-06-12
BipartisanPassage (House)
Passed Congress.gov — House Roll Call #166
House vote by state
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Senate, 2025-03-14
BipartisanPassage (Senate)
Passed Congress.gov — Senate Roll Call #127
Senate vote by state
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Senate, 2025-03-13
BipartisanCloture Motion
Passed Congress.gov — Senate Roll Call #124
Senate vote by state
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Senate, 2025-03-06
BipartisanCloture on Motion to Proceed
Passed Congress.gov — Senate Roll Call #110
Senate vote by state
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