How do FRONTLINE spot-on treatments work?
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- 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.

gland containing treatment