How long does it take for FRONTLINE Plus to kill fleas?

It took a couple of months for our dogs, cats and house to become flea free after we started using Frontline Plus two years ago. We didn't need to use it last year until August. One dose per animal took care of the fleas before they became a problem. I haven't had to use it yet this year. We have four dogs and two cats in and out of the house. It does take time. The eggs that are already in the environments need to hatch and be exposed to Frontline before the cycle is broken. If the animal wanders it's going to pick up more fleas but they won't reproduce if they've bitten your animal.

Step One: Apply Frontline Plus to all animals (this can be done every 3 weeks if you see fleas).

I have used Frontline on my pets for years and this year I have had nothing but problems with fleas. I bought advantage-II for my cat because it was on sale and frontline for my dog because they were out of stock. Within 12 hours my cat was flea free and has been for 3 months now and my poor dog still has fleas. Don't waste your money on frontline. Called frontline hotline and not much they will do for you. They got your money and now they are done with you. I'm headed to the store to buy advantage for my dog.

Do fleas and ticks have to bite my pet for FRONTLINE Plus to work?

I also used frontline plus no good, fleas are having fun biteing my 2 dogs Thanks for all your postings! I called my vet (where I had purchased the frontline) and they told me to contact the company directly, as they said frontline's product was guaranteed to work. Frontline's website "guarantees" their product 100%, but when I talked to the company rep on the phone, they qualified that they only guarantee that any fleas on your pet will not lay eggs, so therefore you will get flea relief "eventually". Which is NOT what their website implies! You can't send them email, you have to contact them by phone, which makes me think they get too many complaints about their product not working as stated.

Why am I seeing more fleas on my pet after applying FRONTLINE Plus?

If frontline GARUNTEES that your pet wont get ticks and fleas and it did somethings up and you should call the company or the your vet or something because that shouldnt happen

After using FRONTLINE Plus, I still see fleas in my home. Why?


Frontline Plus is a monthly topical flea and tick preventative for dogs and cats. Frontline Plus kills 100% of adult fleas on your pet within 12 hours and 100% of all ticks and chewing lice within 48 hours. Frontline Plus contains an insect growth regulator, S-methoprene, which kills flea eggs and larvae. It's effective against all stages of the brown dog tick, the American dog tick, the lone star tick and the deer tick (the major carrier of Lyme disease). (3 Pack = 3 doses which lasts 3 months.)FRONTLINE Plus offers the long-lasting, most complete flea
and tick control available, killing up to 100% of fleas on your pet
within 18 hours and up to 100% of ticks on your pet within 48
hours. Best of all, research confirms that FRONTLINE products
work for an entire month to help keep your pet flea-free.