Following application to the skin, the treatment is absorbed into the sebaceous glands and from there spreads over the skin and coat via the pet’s natural oils.
This topical defence kills parasites on contact, without the need for them to bite to be killed.
Fipronil affects the central nervous system of parasites and causes them to become hyperactive. This means fleas can be more visible when dying, which is a sign that the product is working.
How do FRONTLINE® SPOT-ON treatments work?
