Does flea treatment kill fleas before they lay eggs?

By Ellie

September 19, 2025

Whether a flea treatment kills fleas before they lay eggs depends on the type of product. Some flea treatments don't include the specific active ingredients to effectively kill fleas and their eggs in order to stop infestation. We recommend a double-action flea treatment like Itch Flea Treatment for Cats and Itch Flea Treatment for Dogs which uses active ingredients, Fipronil to kill adult fleas within 24 hours and S-Methoprene to stop the development of flea eggs, larvae and pupae - Working in combination to put a halt to a flea infestation!

For more info on active ingredients in flea treatments click here.

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Does flea treatment kill fleas before they lay eggs?