Flea Medicine

• Flea medication can be given topically, by placing it at the back of your pet's neck. The medication is absorbed into its skin, which then kills fleas when they bite your dog, according to "The First+Aid Companion for Dogs & Cats."
  
  

Allergic Reaction

• Some animals are allergic to flea medicine. This can result in an allergic reaction, which includes symptoms like inflamed, itchy skin where the medication was applied.
  
  

Treatment

• An antihistamine can help control your pet's allergies to flea medicine. Thoroughly rinsing the medication away with cool water will help stop the reaction. Oatmeal baths can help soothe irritated skin.
  
  

Other Options

• Other forms of flea medicine are available. Your veterinarian can help you determine which one will work best for your pet.
  
  

Considerations

• It is more common for a pet to have an allergic reaction to flea bites than to flea medication. Your veterinarian can help you determine which is causing your pet's distress.