Keep Your Dog Free From The Parasites That Matter By Killing Fleas, Heartworm, Ticks And Intestinal Worms . Kills Flea Infestations, As Well As Ticks (Brown And The Deadly Paralysis Tick), For The Full Month. Kills Fleas And Ticks Within 4 Hours. Break The Flea Life Cycle By Killing Adult Fleas Before They Can Lay Eggs - No Further Environmental Infestation. Vet Grade Heartworm Protection With Moxidectin That Kills Heartworm As Well As Intestinal Worms. Safe For Puppies From 8 Weeks Of Age.