21 CFR § 556.560
Pyrantel
June 25, 2020
(a) [Reserved]
(b) Tolerances. The tolerances for pyrantel are:
(1) Swine.
(i) Liver and kidney: 10 ppm.
(ii) Muscle: 1 ppm.
(2) [Reserved]
(c) Related conditions of use. See §§520.2045 and 558.485 of this chapter.