K9 Advantix II is a monthly preventative for dogs that offers comprehensive protection against ticks, fleas, mosquitoes, biting flies, and chewing lice.

K9 Advantix II Dog Flea & Tick Drops is a topical prevention and tick, flea, and mosquito treatment for monthly use on dogs and puppies 7 weeks of age and older.

K9 Advantix II Extra Large Dog is a trademark of Elanco or its affiliates.

Advantage has formulations approved for both dogs and cats, while Advantix is intended for use in dogs only.

PetCareRx says that K9 Advantix II is an effective flea treatment with a status of killing 98-100% of the fleas on dogs within 12 hours and continues to prevent infestations for at least four weeks. The medication also kills fleas before they lay eggs and kills flea larvae upon contact.

K9 Advantix II offers added protection, working to kill and repel ticks and mosquitoes, and it repels biting flies.

Product information

This flea and tick product is far the best we have ever used on our 3 Labradors. Great price for high a quality application. No more itching or picking ticks off my babies. We love it and would recommend it to all of our pet lovers!

Effective flea treatment kills 98-100% of the fleas on dogs within 12 hours and continues to prevent infestations for at least four weeks and kills fleas before they lay eggs. Larval flea stages in the dog's surroundings are killed following contact with a K9 Advantix II.

Dogs treated with Advantix will be less likely to be bitten by mosquitoes or flies. Most veterinarians consider Advantix safe for dogs, but it is a strong medication that should be used with caution. The main active ingredients are imidacloprid and permethrin, both of which can be toxic in high doses.

Dogs treated with Advantix will be less likely to be bitten by mosquitoes or flies. Most veterinarians consider Advantix safe for dogs, but it is a strong medication that should be used with caution. The main active ingredients are imidacloprid and permethrin, both of which can be toxic in high doses.

Allergic reactions and sensitivity While K9 Advantix II for dogs is safe when used as directed, it can be fatal for cats. Permethrin, one of the active ingredients in K9 Advantix II, is toxic to cats. Pet parents of cats and dogs must isolate their cats for at least 24 hours following treatment.