A flea infestation can cause insufferable itching for a dog and the humans around him. Fortunately, products can be applied to dogs once a month that will kill fleas and other insects.
There are three Frontline products for dogs: Frontline Plus, Frontline Top Spot and Frontline Spray. Plus and Top Spot are recommended by veterinarians as monthly treatments to guard against fleas and other pests. Spray is used for quick results with an existing infestation.
Frontline kills adult fleas, flea eggs and flea larvae, all stages of ticks, and chewing lice. The manufacturer, Merial, reports fleas die within 12 hours. Plus and Top Spot prevent or control reinfestations (ticks for 30 days and fleas for up to 90 days).
Mode of Action
The active ingredients in Frontline Plus are fipronil and (S)-methoprene. Fipronil is stored in the oil glands under a dog's skin and then is distributed to the skin and hair through the dog's hair follicles.
Frontline Plus and Frontline Top Spot comes in single-application ampules. The fluid is applied directly onto the dog's skin in a one-inch strip between his shoulder blades where he can't scratch or lick.
The products are harmful if swallowed, and will cause eye irritation. Humans and other dogs should not touch the application site for at least 12 hours after treatment.
Frontline does not interact with medications.
It can be used on pregnant or lactating bitches, but not on puppies under 8 weeks old.
Some dogs may have temporary skin irritation at the treatment site.
Frontline comes in different sizes for different weights of dogs, so it's important to buy the right size.
Although it is recommended to reapply Frontline every 30 days, it is supposed to kill fleas for up to 90 days, so you may be able to stretch the time between applications. You also may be able to skip winter months when fleas and ticks are not around outside.