Lasix Encourages Racehorse Doping in America

The Florida Derby racehorses will be injected with two performance enhancing drugs before heading to the paddock for their derby run, prednisolone and Lasix. Both prerace drugs are allowed by the state racing regulators, who have become puppets of the trainers' lobby. Raceday injections are the root of all the current doping troubles in America. The state racing jurisdictions, all of them, have chosen to set the example of allowing horses to be injected intravenously with performance enhancing drugs shortly before racing. This practice of legal doping has created an untoward atmosphere of generalized racehorse doping, as we are seeing. Raceday and day before medication has to be eliminated if progress protecting the health and welfare of racehorses is to advance.
A strict policy of not allowing horses to be injected with drugs in the days before and the day of racing is the international standard. Where raceday injections are not allowed, racing is 4X safer for the horses, and jockeys. In America, horses break down at 4X the rate of horses racing without the pre-race performance enhancers in Asia, Australia, and Europe.
The raceday drug Lasix potentiates breakdowns due to its performance enhancing effect. Lasix also allows for the substandard care of the racehorses. To permit legal doping is to encourage widespread doping. Raceday Lasix (and IV cortisone) are considered doping by the regulators in Asia, Dubai, Europe, and Australia, where racing is safer and horses are better cared for. 
Sid Gustafson DVM
http://therail.blogs.nytimes.com/author/sid-gustafson/