The use of the following medications and other substances is permitted if quantitated at not more than the specified thresholds: Acepromazine quantitated at not more than 10 nanograms per milliliter of HEPS in urine; Albuterol quantitated at not more than 1 nanogram per milliliter of urine; Butorphanol quantitated at not more than 300 nanograms per milliliter of total butorphanol in urine, or 2 nanograms per milliliter of free butorphanol in blood plasma or serum; Caffeine quantitated at not more than 100 nanograms per milliliter of blood plasma or serum; Cetirizine quantitated at not more than 6 nanograms per milliliter of blood plasma or serum; Cimetidine quantitated at not more than 400 nanograms per milliliter of blood plasma or serum; Cobalt quantitated at not more than 25 nanograms per milliliter of blood plasma or serum; Dantrolene qunatitated at not more than 100 picrograms per milliliter of 5-hydroxydantrolene in blood plasma or serum; Detomidine quantitated at not more than 2 nanograms per milliliter of carboxydetomidine in urine, or 1 nanogram of detomidine per milliliter of blood plasma or serum; Dimethlysulfoxide (DMSO) quantitated at not more than 10 micrograms per milliliter of blood plasma or serum; Flunixin quantitated at not more than 5 nanograms per milliliter of blood plasma or serum; Furosemide (Lasix), as provided in Regulation .08 of this chapter; Gamma aminobutyric acid quantitated at not more than 110 nanograms per milliliter of blood plasma or serum; Glycopyrrolate quantitated at not more than 3 picograms per milliliter of blood plasma or serum; Guaifenesin quantitated at not more than 12 nanograms per milliliter of blood plasma or serum; Ketoprofen quantitated at not more than 2 nanograms per milliliter of blood plasma or serum; Lidocaine quantitated at not more than 20 picograms per milliliter of total 3-hydroxylidocaine in blood plasma or serum; Mepivacaine quantitated at not more than 10 nanograms per milliliter of total hydroxymepivacaine in urine, or the limit of detection of mepivacaine in blood plasma or serum; Methocarbamol quantitated at not more than 1 nanogram per milliliter of blood plasma or serum; Methylprednisolone quantitated at not more than 100 picograms per milliliter of blood plasma or serum; Omeprazole quantitated at not more than 10 nanograms per milliliter of blood plasma or serum; Phenylbutazone quantitated at not more than 0.3 micrograms per milliliter of the blood plasma or serum; Procaine Penicillin quantitated at not more than 25 nanograms per milliliter of blood plasma or serum; Ranitidine quantitated at not more than 40 nanograms per milliliter of blood plasma or serum; Xylazine quantitated at not more than 200 picigrams per milliliter of blood plasma or serum; Nandrolone quantitated at not more than 1 nanogram per milliliter of urine taken from a gelding, filly, or mare; Boldenone quantitated at not more than 15 nanograms per milliliter of urine taken from a colt or horse; Testosterone quantitated at not more than 20 nanograms per milliliter of urine taken from a gelding; and Testosterone quantitated at not more than 55 nanograms per milliliter of urine taken from a filly or mare.