BRAVECTO kills fleas and prevents flea infestations for 12 weeks. BRAVECTO Chew and BRAVECTO Topical Solution for Dogs kills ticks (black-legged tick, American dog tick, and brown dog tick) for 12 weeks and also kills lone star ticks for 8 weeks. BRAVECTO Topical Solution for Cats kills black-legged ticks for 12 weeks and American dog ticks for 8 weeks.