The EPA is evaluating incidents associated with all spot-on flea and tick products, but some products have been reported at a higher rate. Topping the list are prescription products Promeris and Frontline as well as over-the counter products Sentry, Sergeant’s and Zodiac. These are said to account for 80% of reported adverse affects, and the majority of are dog-specific products.
What does this mean for you and your dog? First of all, it does not mean you necessarily should stop using flea and tick control - that could cause more harm than good to your dog. At this time there are no product recalls or specific precautions. The best thing you can do is talk to your vet about your dog's individual needs. Reported reactions have ranged from skin irritation to seizures, so report any unusual signs and symptoms to your vet right away. In addition, myself and the other pet guides at About.com will keep you posted on further developments on this story.
More Information
EPA Full ReportPerils of the New Pesticides
From Your Guide to Veterinary Medicine: From Your Guide to Cats:


Comments
FINALLY! These spot-on products are toxic and it is about time that someone did something about them. I used Frontline on my cat when I saw a flea on her – I panicked a little because I know she is allergic to fleas and the last time she had them all her hair fell out. But the package didn’t mention that you should NEVER give these products to geriatric cats, especially those with chronic liver or kidney conditions. It only says to consult your vet. Mine said it was fine.
My cat is a 14-year old CRF kitty with high blood pressure for which she takes medication and receives fluids everyday. I put the Frontline on her and two days later she was blind. Her condition has declined precipitously since then. I reported this to the FDA even though my vet still touts the safety of Frontline. I don’t believe it and I am eager to see the results of this investigation.
This should be implemented as soon as possible, I believe there are a lot of harmful products out there, not to mention but there a lot of it on the market.
Dogs, Cat and Every Families and need to be in safety condition as always and that should be the first priority of all fleas and tick product providers.