Frontline Plus typically starts working quickly after application, but the exact timeline can vary based on several factors, including the severity of the flea and tick infestation and the specific parasites present. Here's a general overview of when Frontline Plus starts working:
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Killing Adult Fleas and Ticks: Frontline Plus contains fipronil, which is effective at killing adult fleas and ticks on contact. After application, fleas and ticks that come into contact with your pet's fur should start to die within 24 to 48 hours.
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Preventing Flea Egg and Larvae Development: Frontline Plus also contains (S)-methoprene, an insect growth regulator (IGR) that prevents flea eggs and larvae from developing into biting adults. This helps to break the flea life cycle and control infestations in your pet's environment. (S)-methoprene begins working immediately and continues to prevent flea eggs and larvae from developing for up to 30 days after application.
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Continued Protection: Frontline Plus provides ongoing protection against fleas and ticks for up to one month after application. It remains effective even if your pet gets wet, such as after bathing or swimming.
It's important to note that while Frontline Plus works quickly to kill adult fleas and ticks and prevent flea egg and larvae development, it may take some time to see a significant reduction in flea populations, especially if your pet has been heavily infested or if there are fleas in your home environment. Consistent and regular application of Frontline Plus according to the manufacturer's instructions is essential for effective flea and tick control.