I have no intention of using it, I am happy with the advantix which I use. As it is new in Australia all these claims are being made about it, and I was just curious as to what the feeling was in the US for it. As it was invented in the US, I knew that you guys would know of it, and problems with it, if any would be known to some degree, even if the makers are not acknowledging them yet. Some of the things you have raised are interesting. The idea of something lasting for a month which you can do nothing to alleviate side effects of is quite horrible. As with the topicals you can wash them off, and I do know people who have had to do that. I can see the use of such things for some people, but I have also never considered what must be in a product for it to kill all fleas within 4 hours. That is the shortest time claim that I have ever heard of and if it also lasts for a whole month it would also be worrisom to me. I always research anything very thoroughly before I buy it and i also never buy anything that is not a tried and tested product, I just don't like to make my dog or myself a ginea pig for trails of products, but that is just my opinion. No flea, heartworm or worming treatments have to be prescribed by vets in Australia, most are sold in all petshops, online, etc and some are even sold in supermarkets. I am concerned as to where this new product will be sold, but most pet shops do not recommend products they have not had extensive experience with and so while they may sell it, it would be out of the way and only available to those that asked for it. Named brands are not sold in supermarkets and the only things I have ever really seen sold there are daily heartworm tablets (I cannot believe that anyone would bother using them these days) and flea collars the like which are advertised everywehere as being useless. All of that part of every supermarket appears covered in dust as if no one has ever bought any of them, so why they stock them i do not know!! Any animal sold in a pet shop or shelter must come with extensive information on the most accepted ways of treated fleas and heartworm, vaccinations, feeding, water, shelter, bedding, etc, etc. They must be up to date on flea, worming and heartworm control, vaccinated, bathed, microchipped, spayed or neutered, etc.