How FRONTLINE works
FRONTLINE Plus killed 100% of fleas within 12 hours of application* and continues to provide fast-acting, long-lasting flea and tick control. FRONTLINE Plus also breaks the flea life cycle to prevent future infestations.
When you apply FRONTLINE, fipronil, the active ingredient, is stored in the oil glands under your pet’s skin. It is then distributed continuously to the skin and hair of your pet through the hair follicles.
This way, FRONTLINE Plus:
How to apply FRONTLINE
FRONTLINE Plus and FRONTLINE Top Spot can be applied in one easy application: