Frontline provides protection against both fleas and ticks. It is an adulticide, meaning it kills adult fleas and ticks. It has been shown to stand up well to water exposure and does not rinse or wash off. Frontline is a liquid which is used in a similar manner to Advantage flea control. It is applied directly on the skin once a month. See diagram above (click to enlarge). Each packet has 3 applications providing 3 months of protection. It is safe for puppies and kittens.