Section 71 IAC 8-1-2.1 - Thyroxine restrictedAuthority: IC 4-31-3-9
Affected: IC 4-31-12
Sec. 2.1.
(a) Thyroid supplementation is prohibited. Trainers shall not have thyroxine, any other thyroid hormone, thyroid hormone analog, or thyroid supplements on the premise of a facility under the jurisdiction of the commission, nor shall they administer such supplements unless both of the following conditions have been met: (1) A thyrotropin-releasing hormone (TRH) response test has been performed by a commission-licensed veterinarian and supports a diagnosis of hypothyroidism in the horse.(2) A commission-licensed veterinarian has submitted the TRH response test result to the equine medical director, and the equine medical director approves the thyroxine prescription based on their independent determination that the test result confirms the hypothyroidism diagnosis. A T3 or T4 test without stimulation of the thyroid is insufficient to diagnose hypothyroidism.(b) If approved by the equine medical director, the horse shall be treated with only Federal Drug Administration approved medications for hypothyroidism prescribed by a veterinarian. Possession of any thyroid supplements that are not pursuant to a veterinary prescription is prohibited.(c) The prescription for thyroxine or any other thyroid hormone or thyroid hormone analog administration shall not exceed ninety (90) calendar days, after which the prescription must be reauthorized by the equine medical director under either of the following circumstances: (1) The equine medical director has determined that the horse has benefited from the previous thyroxine, thyroid hormone, or thyroid hormone analog treatment after reviewing the horse's medical records and consulting with the attending veterinarian.(2) The hypothyroid diagnosis has been reconfirmed under the requirements described in subsection (a)(1) and (a)(2).(d) A horse administered thyroxine or any other thyroid hormone or thyroid hormone analog, pursuant to this section, is ineligible to start in a race for thirty (30) calendar days after the last administration.(e) If a horse is currently being administered a thyroid supplement, administration of the supplement shall be discontinued and a TRH test conducted after a thirty (30) day washout period before the horse is eligible to race.(f) Possession of thyroxine or any other thyroid hormone or thyroid hormone analog on the premise of a facility under the jurisdiction of the commission is prohibited without a prescription obtained in compliance with this section.(g) In the absence of the equine medical director, or, if there is no appointed equine medical director, the commission or executive director may designate an alternate regulatory veterinary official for this section.Indiana Horse Racing Commission; 71 IAC 8-1-2.1; emergency rule filed 3/3/2022, 3:55 p.m.: 20220316-IR-071220070ERAReadopted filed 7/6/2023, 1:50 p.m.: 20230802-IR-071230371RFAReadopted filed 8/3/2023, 12:49 p.m.: 20230830-IR-071230428RFA