International Prohibited / Forbidden Substance Thresholds

INTERNATIONAL PROHIBITED / FORBIDDEN SUBSTANCE THRESHOLDS (UPDATED JUNE 2018)

The International Federation of Horseracing Authorities have established international thresholds for:
  • substances endogenous to the horse
  • substances arising from plants traditionally grazed or harvested as equine feed
  • substances in equine feed arising from contamination during cultivation, processing or treatment, storage, or transportation
As an International Federation of Horseracing Authorities member the National Horseracing Authority of Southern Africa applies these thresholds / concentrations which are provided below.


Arsenic

  • 0.3 microgram total arsenic per millilitre in urine

Boldenone

  • 0.015 microgram free and conjugated boldenone per millilitre in urine from male horses (other than geldings)

Carbon dioxide

  • 36 millimoles available carbon dioxide per litre in plasma

Cobalt

  • 0.1 microgram total cobalt per millilitre in urine

Dimethyl sulphoxide

  • 15 micrograms dimethyl sulphoxide per millilitre in urine, or
  • 1 microgram dimethyl sulphoxide per millilitre in plasma

Estranediol in male horses
(other than geldings)

  • 0.045 microgram free and glucuroconjugated 5α-estrane-3β,17α-diol per millilitre in urine

Hydrocortisone

  • 1 microgram hydrocortisone per millilitre in urine

Methoxytyramine

  • 4 micrograms free and conjugated 3-methoxytyramine per millilitre in urine

Salicylic acid

  • 750 micrograms salicylic acid per millilitre in urine, or
  • 6.5 micrograms salicylic acid per millilitre in plasma

Testosterone

  • 0.02 microgram free and conjugated testosterone per millilitre in urine from geldings, or
  • 0.055 microgram free and conjugated testosterone per millilitre in urine from fillies and mares (unless in foal)
  • 100 picograms free testosterone per millilitre in plasma from geldings, fillies and mares (unless in foal)

Prednisolone

  • 0.01 microgram free prednisolone per millilitre in urine

N.B.: The conjugated substance is the substance that can be liberated from conjugates.

The concentrations listed above have been determined to be the maximum concentration permitted in a specimen taken from any horse.

In terms of Rules 73.4 and Rule 74 the abovementioned substances shall be prohibited substances if the concentration found in a specimen exceeds the concentration set out above.

Application of International Threshold Values to Out of Competition Testing collected specimens

International threshold values for Testosterone, Estranediol, Boldenone, and Methoxytyramine are applicable to Out of Competition Testing collected specimens.

International threshold values for Hydrocortisone, Arsenic, Dimethylsulfoxide (DMSO), Cobalt, Salicylic Acid and Carbon Dioxide (total available Carbon Dioxide) are applicable to Out of Competition Testing collected specimens. However, these may not be actionable if a legitimate treatment is appropriately recorded in the relevant Veterinary Treatment Register.