Virginiamycin.
21 C.F.R. § 556.750
in effectEffective: 2024-07-01(a) Acceptable daily intake (ADI). The ADI for total residue of virginiamycin is 250 µg/kg of body weight per day.
(b) Tolerances. The tolerances for virginiamycin are:
(1) Cattle. Edible tissues (excluding milk): Not required.
(2) Chickens. Edible tissues (excluding eggs): Not required.
(3) Swine. (i) Kidney, skin, and fat: 0.4 ppm.
(ii) Liver: 0.3 ppm.
(iii) Muscle: 0.1 ppm.
(c) Related conditions of use. See § 558.635 of this chapter.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-21.xmlFetched: 7/26/2026
