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BHA clarifies use of levothyroxine sodium
Racehorses
Levothyroxine sodium must not be present in the horses system on raceday.
Horse must show evidence of equine metabolic syndrome or hypothyroidism

The British Horseracing Authority (BHA) has issued a notice clarifying whether, when and how levothyroxine sodium may be administered under the BHA Rules of Racing.

Levothyroxine sodium is a prohibited substance and therefore must not be present in the horses system on raceday. It is a synthetic version of the naturally occurring hormone, thyroxine, that is made and released by the thyroid gland.

The BHA's rule on the use of veterinary treatment and medication states that “every treatment must be fully justifiable by the medical condition of the horse receiving the treatment”.

For the administration of the hormone to be justified, the organisation say that the horse must have undergone dynamic endocrine tests, which show good evidence of either equine metabolic syndrome or hypothyroidism.

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FIVP launches CMA remedies survey

News Story 1
 FIVP has shared a survey, inviting those working in independent practice to share their views on the CMA's proposed remedies.

The Impact Assessment will help inform the group's response to the CMA, as it prepares to submit further evidence to the Inquiry Group. FIVP will also be attending a hearing in November.

Data will be anonymised and used solely for FIVP's response to the CMA. The survey will close on Friday, 31 October 2025. 

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News Shorts
CMA to host webinar exploring provisional decisions

The Competition and Markets Authority (CMA) is to host a webinar for veterinary professionals to explain the details of its provisional decisions, released on 15 October 2025.

The webinar will take place on Wednesday, 29 October 2025 from 1.00pm to 2.00pm.

Officials will discuss the changes which those in practice may need to make if the provisional remedies go ahead. They will also share what happens next with the investigation.

The CMA will be answering questions from the main parties of the investigation, as well as other questions submitted ahead of the webinar.

Attendees can register here before Wednesday, 29 October at 11am. Questions must be submitted before 10am on 27 October.

A recording of the webinar will be accessible after the event.