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					Originally Posted by Ellie May  No but I've never used it. 
There are several reports that dogs are getting heartworms while on Revolution and because it hasn't been around for long, it would make sense that reports are just starting to come out.  It is also apparently responsible for more deaths yearly than Heartgard and Interceptor combined.  That would make sense if more people used Revolution but I highly doubt it.  Heartgard seems much more popular. 
This is what Google pulls up: Problems with Revolution for dogs? - Yahoo! Answers 
(look at first two posts) Revolution for Dogs review 
(obviously I don't agree with using second best meds in areas with not many heartwork cases becasue that just doesn't make sense to me but I like this write up) Sentinel & Interceptor Are The Safest Heartworm Preventatives | KeoB.com 
If you do a search on YT, there are a couple reports of people hearing that it isn't as effective as other as well.  One of the people who posted is MyFairLacy (vet student).   
Last time I search this I found a bit more info, so I wonder if the sites got taken down or maybe I'm just missing them.  
Of course no med is 100% though and there is risk of heartworms while using any of them... | 
 
  Wow, that is great info....I don't know if we need yet another sticky, however, if we ever *do* get going on the Yorkie Talk Library -- we do need to include info on the various heartworm/flea/etc medications - there are SO many now, and it's confusing. 
Btw, I use generic ivermectin (aka, Heartguard). We luckily don't have much of a flea problem here...and I don't know how I feel about treating for the other worms - as in Heartguard Plus. It's so hard to find real-time prevalence and incidence on these issues.