Adams Plus Flea & Tick Spray combines the adult flea killing power of Etofenprox with the long-lasting flea egg killing power of S-Methoprene, an Insect Growth Regulator. This highly effective combination of ingredients provides quick relief from biting fleas and continuous killing of flea eggs laid on your pet, breaking the flea life cycle. The elimination of both adult fleas and flea eggs is important because adult fleas live on your pet, causing discomfort and skin irritation, while the vast number of eggs that they lay fall off and develop in your house. Effective flea control requires treatment of your pets, house, and yard. Adams products are designed to provide you with the power to prevent pests on every front. Try Adams Flea & Tick Home Spray, specifically designed to use inside your home, and Adams Yard & Garden Spray, designed to use outside in your yard.