21 CFR 556.344
§ 556.344 Ivermectin.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 556.344, § 556.344 Ivermectin, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87780
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Full text
(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.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.