Long-lasting, fast acting flea and tick control. Frontline contains
fipronil, a flea adulticide. Fipronil works by affecting the parasite's
(the flea's or tick's) nervous system causing paralysis and death of the
parasite. Fipronil spreads over the pet's body with the body oils killing
98-100% of the fleas or ticks within 24-48 hours, and controlling transmission
of tick-borne disease, such as Lyme disease.
Fipronil collects in the oils of the skin and hair follicles and then is
released over time (up to 1 month) from the hair follicles onto the skin and
hair.
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Frontline stays on even with bathing, swimming, or exposure to sunlight.
Approved for use on puppies 8 weeks of age and older.