Jersey, I asked about this drug on another forum as there are some rescues and breeders who live near the place where this drug is manufactured. I asked them if they heard of this and what their thoughts were. I got one reply, this is what a breeder who lives near that state replied with:
"Yeah I knew someone who worked in a shelter that used this stuff for ONE month. Despite manufacturer claims it is EXTREMELY painful for the dog. The shelter ceased using it because none of the employees would administer it to animals because they viewed it as inhumane."