How FRONTLINE^® Brand Products Work - From the very first application, FRONTLINE products kill up to 100% of existing fleas in less than 24 hours and continues to provide fast-acting, long-lasting flea and tick control.

Fipronil, the active ingredient in all FRONTLINE Brand Products, is stored under your pet's skin, in the oil glands, so FRONTLINE continuously reapplies to the skin and hair through the hair follicles making it waterproof.

FRONTLINE will remain waterproof and won’t rinse off – even through your cat’s self-grooming or your dog’s monthly bath or swim. In fact, FRONTLINE doesn't stop working for an entire month, giving your pet non-stop flea and tick control.

FRONTLINE breaks the flea cycle
	FRONTLINE starts killing fleas and ticks as soon as they come into contact with your dog or cat. FRONTLINE Plus also keeps future fleas from biting by killing flea eggs and larvae before they mature.

FRONTLINE breaks the tick cycle
	With FRONTLINE Plus or Top Spot®, you get control of both fleas and ticks in one, easy application. And, FRONTLINE Plus and Top Spot are approved for use on puppies and kittens as well as pregnant and nursing mothers.

FRONTLINE in action
	Simply squeeze FRONTLINE Plus or Top Spot between your pet's shoulders and the active ingredient, fipronil, dissolves into the natural oils of the skin and coat. From there, it quickly spreads over your pet's entire body to provide long-lasting, waterproof flea and tick control that keeps working for an entire month.

Application Instructions

Please be sure to read the following instructions carefully before applying FRONTLINE Plus or Top Spot to your pet.
Click here for an application video with some helpful tips.

Step One	Step Two	Step Three
Remove applicator from child-resistant package. Use scissors, or lift and remove plastic tab to expose foil, then peel down.	Open applicator. Hold upright and snap applicator tip away from face and body.	Apply FRONTLINE Plus or Top Spot. Place applicator tip through your pet’s hair to the skin level between the shoulder blades. Squeeze applicator, applying entire contents in a single spot to your pet’s skin.

To download an application brochure, click here.