Ivermectin.
21 C.F.R. § 556.344
in effectEffective: 2024-07-01(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 B1a (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.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-21.xmlFetched: 7/26/2026
