Bravecto (fluralaner) Chews for dogs is the #1 longest-lasting chew* for powerful flea and tick protection. Easy and convenient to administer, just one dose of vet-recommended and FDA-approved Bravecto starts killing fleas and ticks within hours, prevents flea infestations, kills ticks (black-legged tick, American dog tick, brown dog tick and Asian longhorned tick) for 12 weeks* and kills lone star ticks for 8 weeks.