Giving your dog Frontline flea medication will not be harmful to your kids. Just make sure that they don’t directly touch the liquid where it was applied in between the animal shoulder blades in the few hours after the application.
It takes about 24 hours for that wet spot to completely dry, so just tell your children not pet the dog or cat directly on that spot while it is still wet. Even if they do, it won’t have any serious consequences, just have them wash their hands with soap and water to clean it off.
The Frontline liquid is absorbed into the hair follicles of the animal and spread across the body through a natural process called translocation. Although the pesticide is toxic to fleas and other parasites, it won’t be harmful to your children to play with their favorite pet who has been treated with Frontline flea medication.