I applied frontline to my rat terrier and for a few days now he has been very lethargic and not acting like his normal, playful self. He has been to the doctor and she said that nothing appears to be wrong but has never heard of any dog reacting like this to frontline. Has anyone experienced this?
Five days after Frontline, my dog too has been lethargic, throwing up, peeing on the floor, shaking and will now hardly eat. I am also wondering what to do in the future as the fleas were driving him crazy. Poor pup! It seems Frontline is not as safe as they claim.
We have been having trouble with fleas. Our German Bloodlabsky (mutt!) is allergic to the bites. I gave him Vector on September 2 and it did nothing. I gave him a bath a week later and washed out at least 20 fleas.
He scratched like crazy for a month and then I gave him Frontline on Saturday. By Sat. night he was vomiting and absolutely miserable. By Sunday am he was even vomiting water. By last night (Sunday pm) he was starting to feel a little better. Today he's keeping stuff down but still isn't quite himself yet.
Good news, the fleas are gone. Bad news, his reactions to Frontline have gotten worse and now I don't think I can use it on him again. When the vet says that Frontline shouldn't cause that reaction, I'm not buying it!
thanks for that link!!!!
Yes. My cat seemed near death from frontline. The first 24 hours he was just lethargic, and in the next 24 hours he was unresponsive. I took him to the vet who said it was highly doubtful it was the frontline. We called poison control who ssured me it could not have been from frontline, but I saw it all happen, I know it was. 350 bucks worth of tests later showed him to be in otherwise perfect health. His sister had a minor reaction last month and I opted not to give it to her. Boy was I glad!
I have met others whose cats have also had reactions. Frontline's claim that it is so safe and virtually impossible for them to have a serious reaction seems incorrect. PS I have six cats and right now, three of them have thinned hair at the site of Frontline's application.
I too have noticed lethargy in one of my furkids, and just recently realized that it has to be the Frontline. I have seen no side effects in my shep/samy mix. My border collie/pin mix gets lethargic the day of the application. She vomited the day after the app, and has urinated on the floor the last two days while I was at work. The first two symptoms happened the last time, but I chalked it up to nervousness (we had just gotten home from a long car trip). I believe the urination is the result of her wanting to drink a lot of water after the application (her thirst is insatiable). I am scared silly (thinking of a kidney issue?!?) and plan to call the vet in the morning. I will not be reapplying the Frontline but, unfortunately, she has an allergic reaction to flea bites and needs to be on some type of medication . . .
The EPA reported in May 2009 an increase in complaints of adverse reactions to spot-on flea & tick products. There's a site about this at their website: www.epa.gov/pesticides/health/flea-tick-control.html.
Hope your baby is ok!




I'm sorry to hear that, emmadub. I hope that you've taked your dog to the vet.
The EPA has some guidelines to help protect against fleas and ticks: http://www.epa.gov/pesticides/factsheets/flea-tick.htm.
~Shana C., PetSmart