Section 603.210  Androgenic-Anabolic Steroids (AAS)

a)         No AAS shall be permitted in test samples collected from racing horses except for endogenous concentrations of the naturally occurring substances nandrolone, boldenone and testosterone at concentrations less than the threshold levels indicated in subsection (b).

b)         Concentrations of these AAS shall be less than the following free (i.e., not conjugated) steroid concentrations in plasma or serum:

1)         Boldenone ‒ shall be less than 25 pg/ml for all horses regardless of sex.

2)         Nandrolone ‒ shall be less than 25 pg/ml for geldings, fillies and mares. Male horses other than geldings will not be tested.

3)         Testosterone − in fillies, mares, and geldings ‒ shall be less than 100 pg/ml.

c)         All other AAS are prohibited in racing horses.

d)         The sex of the horse must be identified to the laboratory on all pre-race and post‑race samples.

e)         If an anabolic steroid has been administered to a horse in order to assist in the recovery from illness or injury, the horse may be placed on the Veterinarian's List in order to monitor the concentration of the drug or metabolite in serum or plasma.  After the concentration has fallen below the designated threshold for the administered AAS, the horse is eligible to be removed from the list.

(Source:  Amended at 44 Ill. Reg. 15987, effective October 1, 2020)