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The active ingredient in Comfortis® is spinosad. When ingested by fleas, spinosad targets the flea's nervous system leading to flea paralysis and rapid death. While extremely toxic to fleas, spinosad has a high safety margin in mammals, so Comfortis® can be used in kittens from 14 weeks of age. Because you give Comfortis® to your pet orally, you do not have to tolerate the mess of topical products. Comfortis® is rapidly absorbed in your cat's bloodstream, where it circulates and protects your cat from flea infestation for a full month. Comfortis® begins killing fleas within 30 minutes, so you know your cat is getting fast relief and long-lasting protection. Comfortis® does not depend on your cat's skin and hair coat to distribute across the body. That's why Comfortis® is a great choice for cats with skin problems, as flea protection is vitally important and cannot be compromised.

Thanks to the fact that Comfortis® comes in beef-flavoured, chewable tablets, it's one of the most convenient flea products on the market today Give Comfortis® chewable tablets once a month with food for maximum effectiveness. For best results, monthly treatment with Comfortis® should continue the entire year without interruption. To minimise the likelihood of flea reinfestation, treat all animals in your household with an approved flea product.

Female fleas that are living on animals produce eggs that fall from the animal into their surroundings. These eggs usually hatch within a week; larvae then emerge and spin cocoons to become pupae. The entire life cycle can be completed in as little as two weeks, with new adult fleas emerging from the pupae, to jump onto your cat.