Your data on MRCVSonline
The nature of the services provided by Vision Media means that we might obtain certain information about you.
Please read our Data Protection and Privacy Policy for details.

In addition, (with your consent) some parts of our website may store a 'cookie' in your browser for the purposes of
functionality or performance monitoring.
Click here to manage your settings.
If you would like to forward this story on to a friend, simply fill in the form below and click send.

Your friend's email:
Your email:
Your name:
 
 
Send Cancel

Jumping horses test positive for banned substances
Jumping horse
“The presence in all these samples of oripavine, which is not found in any veterinary products, suggests that this could be contamination, but obviously we still have to follow standard procedure” -
FEI secretary general.

Poppy seed contamination suspected

Three Swiss Jumping horses have tested positive for prohibited substances, the International Federation for Equestrian Sports (FEI) has announced.

Samples taken at La Boule in May from the horses Nino des Buissonnets and Nasa, both ridden by Olympic champion Steve Guerdat, tested positive for the banned substance codeine and the controlled substance, morphine. 

Both horses also revealed traces of the banned substance oripavine, however there was not enough in Nasa's sample to declare a positive.

In the same month, samples taken in Deauville from the horse Charivari KG, ridden by Alessandra Bichsel, also returned positive for codeine, oripavine and morphine.

Under the FEI's Equine Anti-Doping and Controlled Medication Regulations, Steve Guerdat and Alessandra Bichsel have been provisionally suspended, and the three horses have been provisionally suspended for two months. The FEI will offer the athletes and the horse owners the opportunity for a preliminary hearing before the FEI Tribunal to request the lifting of the provisional suspensions.

FEI secretary general Sabrina Zeender said:  “The presence in all these samples of oripavine, which is not found in any veterinary products, suggests that this could be contamination, but obviously we still have to follow standard procedure”

“The combination of oripavine, morphine and codeine have frequently been seen in contamination cases from other equestrian sport regulators, and the FEI already has three outstanding cases from 2014 involving oripavine and morphine in which we proactively sought the lifting of the provisional suspensions. As the regulator of international equestrian sport, we have to balance fairness to the athletes with our dual role of protecting horse welfare and maintaining a level playing field.”

Oripavine is an analgesic that is not used clinically due to it being extremely toxic and having a very narrow therapeutic margin. Positive results are often the result of the ingestion of poppy seeds. Codeine and morphine, which are both also found in poppy seeds, are also analgesics.

Because of the evidence of poppy seed contamination resulting in positives, the FEI downgraded morphine from a banned substance to a controlled medication in 2013. Codeine is listed for a similar downgrading when proposed changes to the Equine Prohibited Substances List comes into effect on 1 January 2016.

Become a member or log in to add this story to your CPD history

Equine Disease Surveillance report released for Q4 2025

News Story 1
 The latest Equine Disease Surveillance report has been released, with details on equine disease from Q4 of 2025.

The report, produced by Equine Infectious Disease Surveillance, includes advice on rule changes for equine influenza vaccination.

Statistics and maps detail recent outbreaks of equine herpes virus, equine influenza, equine strangles and equine grass sickness. A series of laboratory reports provides data on virology, bacteriology, parasitology and toxicosis.

This issue also features a case study of orthoflavivus-associated neurological disease in a horse in the UK. 

Click here for more...
News Shorts
NSA webinar explores sheep tailing and castration

The National Sheep Association (NSA) is to host a free webinar on the castration and tail docking of lambs.

The webinar, 'Understanding the tailing and castration consultation: A guide for sheep farmers', will be hosted online on Monday, 2 March 2026 at 7.30pm.

It comes during a government consultation into the methods used for these procedures. Farmers are encouraged to engage before the consultation period closes on Monday, 9 March 2026.

The webinar offers clear and actionable guidance to support farmers to contribute meaningfully to the consultation and prepare for potential changes.

On the panel will be former SVS president Kate Hovers, farmer and vet Ann Van Eetvelt and SRUC professor in Animal Health and Veterinary Sciences Cathy Dwyer. Each panel member will utilise their own specialism and expertise to evaluate risks and outcomes to sheep farming.

Find out more about the webinar on the NSA website.