Comfortis Chewable Tablets for Dogs, 40.1-60 lbs, 6 treatments (Blue Box) By Comfortis

Comfortis is a chewable medication prescribed by veterinarians for dogs and cats to help treat — and possibly even prevent — flea infestations for up to one month. These flavored tablets can be added to your pet’s favorite food and only need to be given to your canine companion once a month to help combat fleas.