Show jumper Kaitlin Campbell, who recently represented the United States at the Longines FEI Jumping World Cup Final (Switzerland), has been provisionally suspended by the Fédération Equestre Internationale for a doping violation involving her World Cup Final partner, Castlefield Cornelious.

A drug testing sample taken from Castlefield Cornelious last December during the $1 million MLSJ FEI Coachella Cup CSI5* in Thermal, California, where the pair finished 15^th, tested positive for dexamethasone and octopamine, according to a Tuesday media release from the FEI. The two medications are prohibited substances under FEI rules.

In regards to equine prohibited substances, the FEI distinguishes between “controlled medications,” which are regularly used to treat horses but must clear a horse’s system by the time of competition, and “banned substances,” which are substances that should never be found in the body of a horse and are prohibited at all times. The FEI counts dexamethasone, a corticosteroid, as a controlled medication, and octopamine, a stimulant, as a banned substance.

Under FEI rules, in banned substances cases, the person responsible is automatically provisionally suspended from the date they are notified of the adverse finding, while the horse is provisionally suspended for two months.

Campbell was provisionally suspended beginning Monday, June 16, with no end date listed, and Castlefield Cornelious, a 14-year-old Oldenburg (Cornet Obolensky—Coco, Contender) owned by Mirasol Equestrian, LLC, was provisionally suspended from FEI competition for two months, ending Aug. 15. The U.S. Equestrian Federation has reciprocated Campbell’s FEI suspension, so she is also prohibited from competing at USEF shows during her FEI suspension.

“This has been a perplexing situation that I hope to resolve with the FEI soon,” Campbell wrote in an email to the Chronicle.