Recommended by vets and loved by dogs, Frontline gets rid of pesky fleas so pet owners can focus on the fun stuff. Part of the Merial portfolio of products, billions of doses have been administered since the 1970s. With a focus on developing the best products with maximum safety, effectiveness, and ease of use, it’s no wonder it’s one of their best-selling products. Frontline Plus features a combination of powerful, yet safe, ingredients that works to end fleas in multiple ways. Not only does it kill adult fleas and ticks, but it breaks the flea life cycle by killing the eggs and larvae and preventing another generation. Plus, it works for 30 straight days and offers waterproof effectiveness so dogs and their owners can go about their normal routine. In fact, studies show that it starts killing adult fleas within 12 hours of application, which means relief is always very near with Frontline Plus.