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 are more sensitive to organophosphate insecticides than most other animals.
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. In some cases, exposed cats can start showing signs within hours. Symptoms would include drooling, depression, labored breathing, weakness, and convulsions. Without prompt and proper treatment, many exposures could lead to the animal's death.