Indorex Household Flea Spray contains a combination of 3 ingredients: pyriproxyfen, permethrin & piperonyl butoxide. Permethrin is an insecticide which effectively & quickly kills adult fleas present in a pets environment. Piperonyl butoxide is a synergist that reinforces the activity of permethrin. Pyriproxyfen is a long-acting Insect Growth Regulator that prevents flea eggs & larvae from developing into adults. This breaks the flea life-cycle & provides a continuous protection for up to 12 months when used as directed & eliminates adults for 2 months. Indorex Household Flea Spray provides total control of house dust mites. Indorex Household Flea Spray represents a modern method to combat flea infestations. It is a necessary complement to the direct treatment of pets with an insecticide (as a pump or aerosol spray solution, a spot-on solution, a collar, a powder, a shampoo or a lotion.