Your family is our family. Were here to help protect your cat with vet-quality care you can use at home. With the same active ingredients as FRONTLINEPlus for Cats for less,* PetArmor Plus for Cats is a fast-acting topical that kills fleas, flea eggs, flea larvae, ticks and chewing lice for up to 30 days. Reapply monthly to kick pests to the curb year-round.