From PReport article: [I]The issues Bramlage is seeing are in horses that have been given bisphosphonates outside manufacturer guidelines. The guidelines state the drugs should not be administered to horses under the age of five.
“If you’re interested in using them, you should go to the manufacturer’s website because more than 50 percent of the package insert is telling you why you shouldn’t use them in young horses,” he said. “However, they’re perfectly willing to sell them to you for use in young horses. All of those disclaimers are meant to put the blame for anything bad that happens to your young training horse on you and not the company.”[/I]
[I]Bisphosphonates became a concern for racing regulators in 2015 when the Kentucky Equine Drug Research Council announced its intent to study the drugs after receiving information some managers and trainers could be using it for its analgesic effect.
In England, the British Horseracing Authority issued a mandatory 30-day stand-down period for horses receiving bisphosphonates and prohibits their use in horses less than 3 1/2 years of age.
Unfortunately, the drug is difficult to test for and Bramlage worries the temptation of general analgesia can prove too much for some horsemen.
“Routine use of it I think is accelerating on the racetrack based on the number of horses we see that don’t follow the normal healing pattern,” he said. [/I]
So…somebody is using it. But maybe in the year since the article was written, use has curtailed.