FDA Launches Pilot to Speed Animal Drug Residue Testing

A voluntary risk-based approach lets sponsors of new animal drugs meet residue method standards more quickly.

Updated on Nov. 4, 2026 in Veterinary Medicine

FDA Launches Pilot to Speed Animal Drug Residue Testing

The FDA Center for Veterinary Medicine has launched a pilot program offering sponsors of new animal drugs a faster, more flexible path to meet residue analytical method standards. Participation in the pilot is voluntary.

Why it matters

Traditional interlaboratory trials for residue methods can take approximately two years, so the pilot could shorten drug review timelines. The change stems from the five-year FDA-industry agreement reached under the 2024 reauthorization of the Animal Drug User Fee Act.

The pilot is called the Risk-Based Tiered Approach to Demonstrate Residue Analytical Method Practicability and covers Tier 1 (negligible risk), Tier 2 (low risk) and Tier 3 (moderate risk). Sponsors may submit methods for residues in meat, milk, eggs and honey.

The players

U.S. Food and Drug Administration (FDA)

The federal agency responsible for regulating human and animal drugs, food safety and biological products in the United States.

Center for Veterinary Medicine (CVM)

The FDA center that regulates animal drugs, feed and medical devices for animals, and administers the residue testing pilot.

The details

Under the pilot, sponsors conduct a single method validation study usable in residue depletion studies, guided by a companion One Method Approach document that integrates VICH GL49 and Guidance for Industry #3. The approach relies on CVM's confidence in a method's reproducibility and usability in a government laboratory.

2024: ADUFA V reauthorization establishes the five-year FDA-industry agreement.
November 4, 2026: FDA launches the residue testing pilot program.
The pilot remains in effect until at least three new products complete Tier 2 or Tier 3 review, or until the end of ADUFA VI, whichever comes first.

Culture Shift

The pilot is an output of the ADUFA V five-year FDA-industry agreement reached in 2024, which set out to streamline statutory residue analytical method requirements. It follows that user-fee framework rather than departing from it.

Pet owners and livestock producers may see new animal drugs reach the market sooner if sponsors use the pilot. The residue standards that govern meat, milk, eggs and honey remain unchanged for consumers.

The takeaway

Faster residue method review could bring new animal drugs to market sooner without weakening food safety evaluation. Readers can track how many sponsors enroll before the pilot's end conditions are met.