Ivermectin.

(a) Acceptable daily intake (ADI). The ADI for total residue of ivermectin is 5 µg/kg of body weight per day. (b) Tolerances. The tolerances for 22,23-dihydroavermectin B 1 a (marker residue) are: (1) American bison. Liver (target tissue): 15 ppb. (2) Cattle. (i) Liver (target tissue): 1.6 ppm. (ii) Muscle: 650 ppb. (3) Reindeer. Liver (target tissue): 15 ppb. (4) Sheep. Liver (target tissue): 30 ppb. (5) Swine. (i) Liver (target tissue): 20 ppb. (ii) Muscle: 20 ppb. (c) Related conditions of use. See §§ 520.1192, 520.1195, 520.1197, 522.1192, 522.1193, 524.1193, and 558.300 of this chapter. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020]