Best Flea and Tick Prevention for Dogs: NexGard vs Frontline vs Simparica
Best Flea and Tick Prevention for Dogs: NexGard vs Frontline vs Simparica The three names on every vet's shortlist — NexGard, Frontline Plus, Simparica — are not three versions of the same product. One is a prescription monthly chew in the isoxazoline class, one is an over-the-counter monthly topical built on an older chemistry, and one is a prescription chew from a competing isoxazoline family. What they share is a marketing claim that every box makes: "kills fleas and ticks". What they differ on — form, prescription status, heartworm overlap, and price — is what actually decides the right dog. Every price below was read from1800PetMeds' live US storefront on October 20, 2026, and every "from" price is the smallest pack they list; final prices move with your dog's weight band. The 30-second answer Most dogs are best served by an isoxazoline chew — NexGard or Simparica — because monthly swallow-and-done beats a monthly hands-on application you can ...