Frontline Spray provides long-lasting, effective control of fleas and ticks on your pet. It kills up to 100% of existing fleas in less than 24 hours. Frontline Spray continues killing fleas for an entire month or more. • Fleas: FRONTLINE® Spray kills adult fleas within 24 hours following their arrival on your animal. • Ticks: FRONTLINE® Spray eliminates 90% of ticks within 48 hours following their arrival on the animal, to limit the risk of disease transmission. This risk is maximal 48 hours after tick fixation on the animal. • Dogs and cats' lice: FRONTLINE® Spray kills lice already on the animal within 48 hours maximum