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Cat still has fleas after Frontline. How long to wait for Advantage?

Updated on September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed

I gave my cat frontline 2 weeks ago but she still has fleas. I want to try advantage. How long do I need to wait to give her a new medicine?

1 Answer

Most Helpful Answer

Angel Alvarado, LVT

Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on July 23rd, 2018

Wait at least one more week. Be sure to apply the liquid directly to the skin, not on the fur. If Cricket has been bathed, or will be bathed, wait at least 2-3 days before or after a bath. These topicals use the oils in the the skin to spread. A bath removes the oils which can affect the treatment. Use the appropriate size for her weight.
Don't forget to treat the environment, since most fleas live off of the pet. Vacuum everywhere and dispose of the bag or empty the canister outdoors immediately after. Wash all bedding in the hottest water allowable by fabric and dry in the dryer. Use a cat safe area treatment to prevent reinfestation.
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