Cargill identified Progressive Nutrition Soothing Pink, a horse supplement advertised to prevent gastric upset, as the culprit.

FEI Suspends US Horses, Riders for Prohibited Substances

Prohibited Substances

The Fédération Equestre Internationale (FEI) announced the suspensions of three United States horse and rider combinations due to prohibited substances.

The cases involve the use of Banned Substances under the FEI’s Equine Anti-Doping and Controlled Medication Regulations. The international federation provisionally suspended the equestrians until the FEI Tribunal renders a final decision. The horses are suspended for two months.

The suspended include:

Horse: Luke Skywalker 46 (FEI ID 46 /103XB94/USA)

Person Responsible: Paige Johnson (FEI ID 10013411/USA)

Event: CSI2* Wellington FL (USA), January 17-22, 2017

Prohibited Substance: Pramoxine

Pramoxine is used as a local anesthetic agent and is incorporated in some preparations for the treatment of hemorrhoids in humans. Also used for topical relief of pain. It is BANNED by the FEI. 


Horse: Horizon (FEI ID 105FJ02/USA)

Person Responsible: Adrienne Lyle (FEI ID 10015662/USA)

Event: CDI3* Wellington FL (USA), February 8-12, 2017

Prohibited Substance: Ractopamine


Horse: Don Principe (FEI ID USA41197/USA)

Person Responsible: Kaitlin Blythe (FEI ID 10046212/USA)

Event: CDIU25 Wellington FL (USA), February 8-12, 2017

Prohibited Substance: Ractopamine

Ractopamine is a beta-adrenoceptor agonist which has been shown to improve growth performance in pigs.


Ractopamine is used in non-equine feed to improve the leanness of animals raised for meat. Horses may test positive for ractopamine if the horse feed process is adulterated through contamination.

Some in the horse racing industry have used ractopamine for its steroid-like effects, although it is not approved for use in horses.

Olympian Adrienne Lyle said, “I am completely devastated by the news of Horizon testing positive for a banned substance. Anyone who knows me or Betsy Juliano knows we would ABSOLUTELY NEVER let a banned substance get anywhere near our horses! It is a complete shock and makes no sense to me, and I am still reeling from this news.”

She adds, “I completely support the FEI’s clean sport policy and I am so careful about everything I feed and about every little thing that comes in contact with my horses! We are doing everything in our power to find out how this could have possibly happened…”

The FEI also suspended three additional competitors from outside the states for other prohibited substances.