There is more than likely that it was an ingredient of a "Breathing Remedy " concoction that was mixed by a supplier or even a vet. I got a bottle of a similar type my my regular Vet and was instructed to give 10cc 4hrs out. Well to make a long story short, the same day my check for 59k from the Sire Stake win came,so did the dreaded call from the Judges! The Breathing blend contained Dexamethasone.