I order Interceptor and K9 Advantix from Drsfostersmith.com. They DO require a perscription for Interceptor, which my vet signs. They DO NOT require a perscription for K9 Advantix.

The Interceptor is significantly less expensive. It looks the exact same & works great.

My vet doesn't offer K9 Advantix, so I buy online. Neither Frontline or Advantage worked for my pups, so I decided to try K9 Advantix & am very happy with it.