If you do not completely understand the instructions, you should contact the manufacturer or your veterinarian for clarification. Observe the species and age requirements listed on the label. Cats react very differently than dogs to some insecticides. Some dog products can be deadly to cats, even in tiny amounts. Use caution when using products that contain organophosphates in your house or on your cat.
Cats seem to be sensitive to certain organophosphate insecticides.
Currently, there are few flea products in the United States labeled for use on cats that contain organophosphates as an active ingredient. The few that can be used on cats contain a small concentration of organophosphate. Never use flea control products that contain permethrin on your cats, unless they are specifically labeled for use on cats. When used according to the label instructions, these can be used safely in cats. Always use caution when using shampoos, sprays, topical spot-ons or mousse near your animal's eyes, ears and genitalia.