21 C.F.R. § 556.286 – Flunixin.

(a) Acceptable daily intake (ADI). The ADI for total residue of flunixin is 0.72 µg/kg of body weight per day.
(b) Tolerances. The tolerances for flunixin are:
1. (1) Cattle.
  1. (i) Liver (target tissue): 125 ppb flunixin free acid (marker residue).
  2. (ii) Muscle: 25 ppb flunixin free acid.
  3. (iii) Milk: 2 ppb 5-hydroxy flunixin (marker residue).
2. (2) Swine.
  1. (i) Liver (target tissue): 30 ppb flunixin free acid (marker residue).
  2. (ii) Muscle: 25 ppb flunixin free acid.
(c) Related conditions of use. See §§ 522.956, 522.970, 522.1664, and 524.970 of this chapter.