Frontline Plus is a topical once monthly treatment that controls and prevents flea infestation, and controls brown dog ticks, paralysis ticks, and biting lice on both puppies and dogs. Frontline Plus is fast acting and is guaranteed to kill 100% of fleas and their larvae on your pet within 24-48 hours after application. It eliminates re-infestation of new adult fleas for up to one month after treatment, and prevents the development of flea larvae, pupae and eggs for up to three months after treatment. Frontline Plus also provides an effective barrier against ticks; it controls brown dog ticks for up to one month, and paralysis ticks for up to two weeks after application (when combined with daily tick searches through the tick season). Frontline Plus is a water resistant flea treatment; it continues working through exposure to water and shampoo. This product is recommended for use on dogs and puppies over the age of 8 weeks. For extra large dogs 40-60kgs. Use only as directed on label.