We’ve all had a flea infestation at some point in our lives. It’s not fun, and it can be incredibly frustrating.
The good news is that there are many ways to get rid of fleas. One of the best ways to do this is by using a product called Frontline. This article will discuss what Frontline is, how it works, and whether or not it actually kills fleas.
Fleas are small, blood-sucking parasites that can be found both indoors and outdoors. Though they are most commonly associated with dogs, fleas can also infest cats, rabbits, ferrets, mice and rats. In addition to being an annoyance to the animal who is infested with them, fleas can also cause serious health problems for your pet.
Frontline is a popular brand of flea medication that is used to treat and prevent infestations of fleas in dogs and cats. It also treats other common pests like ticks, lice and mites. Frontline kills fleas and ticks on contact, so it’s effective as soon as you apply it to your dog’s skin or give it orally to your cat. The medication works by attacking fleas’ nervous system, causing paralysis and death in just hours. Because Frontline is applied directly to your pet’s skin or ingested orally, you don’t need to worry about your pet getting sick from consuming the medication itself like you would with other types of medications (like pills). If you have any concerns about giving Frontline to your pet, ask your veterinarian for guidance.
Does Frontline Kill Existing Fleas?
Yes, Frontline does kill existing fleas. The active ingredient in Frontline is fipronil, which is a non-steroidal insecticide that targets the central nervous system of insects. Because fleas are arthropods, they have exoskeletons that protect their bodies and allow them to move around and bite you. Fipronil breaks down these exoskeletons, causing death and paralysis in fleas. Frontline is a topical application that can be applied once every month in order to prevent fleas and ticks from bothering your cat. It is available as a single-dose vial for cats or as a 3-dose vial for dogs. When applied, Frontline kills existing fleas within 12 hours and prevents new fleas from attaching themselves to your pet’s fur for up to 30 days.
How Long Does It Take Frontline to Kill Live Fleas?
Frontline is a flea control medication for dogs and cats. It can be used to control fleas on dogs and cats for up to 30 days.
It is important to note that Frontline does not kill fleas immediately, but it can take between 4 and 8 hours for the first fleas to die in the animal’s fur. The product should be applied to the skin between the shoulder blades, as close to the base of the neck as possible. The dog should not be bathed for at least 24 hours after application, and owners should avoid getting water on their pet’s face and head for 24 hours after application. Itchiness or other side effects may occur in dogs who are sensitive to Frontline. If this occurs, contact your veterinarian immediately.
Can Fleas Lay Eggs After Frontline?
Fleas can lay eggs after Frontline, but it’s rare. The reason for this is that the life cycle of a flea requires a warm-blooded host, and Frontline disrupts the fleas’ ability to feed on their hosts. However, it’s still possible for the fleas to lay eggs.
If you have noticed fleas in your home, it would be wise to use a different preventative measure until you can get rid of them completely.
How Do I Know Fleas Are Dying After Using Frontline?
It can be difficult to know whether a flea is dead or alive when you’re trying to treat a pet, but there are several ways to tell.
First, if you’re using Frontline or another flea medication that contains fipronil, you’ll see the dead fleas on your pet’s coat. They will look like small brown dots or specks on the fur. These fleas will also be moving much slower than they were before treatment. If you don’t see any signs of these insects on your pet’s coat after using Frontline or another similar medication, then it’s likely that the product wasn’t effective in killing them all off. This isn’t always the case though, so don’t assume that something went wrong unless you see evidence of dead fleas on your pet’s coat.
If you’re unsure whether your dog has fleas or not, then it might also help to check their ears and paws for any signs of irritation caused by bites from these tiny insects. The symptoms of being bitten by a flea include scratching at the site of the bite and some redness around it as well as an increase in dandruff shedding around this area due to excessive grooming attempts by your dog in order to relieve this itching sensation caused by
The best way to know if fleas are dying after using frontline is to look for flea dirt. Flea dirt is the white, chalky substance that fleas leave behind when they die. If you see this substance anywhere in your home, it’s a good indication that your pets have been infested with fleas and you should use frontline again soon.
List of frontline fleas killer and where to buy
Frontline fleas killer is one of the most popular products for getting rid of fleas. It is available in the form of a liquid that you apply directly to your pet’s skin. This product can be purchased at a number of locations, including:

FRONTLINE Plus for Cats and Kittens (1.5 pounds and over) Flea and Tick Treatment, 3 Doses
Price : $38.99
Features :
- Waterproof flea and tick treatment for cats and kittens: Frontline Plus for Cats provides waterproof, fast-acting, long-lasting flea and tick treatment and control for your cat. This product is approved for use on cats and kittens 1.5 lbs and over.
- Break the flea life cycle with frontline: Frontline flea and tick treatment for cats kills adult fleas plus flea eggs and larvae to stop existing infestations and prevent establishment of new infestations.
- Kills fleas and ticks: Frontline flea and tick treatment for cats kills fleas, flea eggs, lice, and ticks. This flea and tick treatment kills ticks, including those that may transmit Lyme disease.
- Trusted flea and tick protection for cats: Frontline Plus for Cats has been trusted by veterinarians for nearly 20 years. Made with 2 tough killing ingredients, fipronil and (S)-methoprene – one to kill adult fleas and ticks and the second to kill flea eggs and larvae – this fast-acting, long-lasting protection provides flea and tick control for cats and kittens 8 weeks and older.
- Lasting flea and tick protection: Frontline’s long-lasting formula is stored in the oil glands of the cat’s skin to give non-stop flea and tick protection for a full 30 days. Frontline flea and tick treatment for cats works non-stop for a full 30 days. A 3-dose supply lasts for 3 months.
Additional Info :
Color | Green |
Item Dimensions | |
Height | 0.5 Inches |
Width | 4.5 Inches |
Length | 6 Inches |
Weight | 0.07054792384 Pounds |

Frontline Plus Flea and Tick Treatment for Dogs (Small Dog, 5-22 Pounds, 3 Doses)
Price : $38.99
Features :
- Waterproof flea and tick treatment for dogs: Frontline Plus for Dogs provides waterproof, fast-acting, long-lasting flea and tick treatment and control for your dog. This product is approved for use on dogs 5-22 lbs.
- Break the flea life cycle with frontline: Frontline flea and tick treatment for dogs kills adult fleas plus flea eggs and larvae to stop existing infestations and prevent establishment of new infestations.
- Kills fleas and ticks: Frontline flea and tick treatment for dogs kills fleas, flea eggs, lice, and ticks. This flea and tick treatment kills ticks, including those that may transmit Lyme disease.
- Trusted flea and tick protection for dogs: Frontline has been trusted by veterinarians for nearly 20 years. Made with 2 tough killing ingredients, fipronil and (S)-methoprene – one to kill adult fleas and ticks and the second to kill flea eggs and larvae – this fast-acting, long-lasting protection provides flea and tick control for dogs and puppies 8 weeks and older
- Lasting flea and tick protection: Frontline’s long-lasting formula isstored in the oil glands of the pet’s skin to give non-stop flea and tick protection for a full 30 days. Frontline flea and tick treatment for dogs works non-stop for a full 30 days. A 3-dose supply lasts for 3 months.
Additional Info :
Color | orange |
Item Dimensions | |
Height | 4.5 Inches |
Width | 0.75 Inches |
Length | 5.75 Inches |
Weight | 0.8 Pounds |

Frontline Plus Flea and Tick Treatment for Dogs (Large Dog, 45-88 Pounds, 3 Doses)
Price : $38.99
Features :
- Waterproof flea and tick treatment for dogs: Frontline Plus for Dogs provides waterproof, fast-acting, long-lasting flea and tick treatment and control for your dog. This product is approved for use on dogs 45-88 lbs.
- Break the flea life cycle with frontline: Frontline flea and tick treatment for dogs kills adult fleas plus flea eggs and larvae to stop existing infestations and prevent establishment of new infestations.
- Kills fleas and ticks: Frontline flea and tick treatment for dogs kills fleas, flea eggs, lice, and ticks. This flea and tick treatment kills ticks, including those that may transmit Lyme disease.
- Trusted flea and tick protection for dogs: Frontline has been trusted by veterinarians for nearly 20 years. Made with 2 tough killing ingredients, fipronil and (S)-methoprene – one to kill adult fleas and ticks and the second to kill flea eggs and larvae – this fast-acting, long-lasting protection provides flea and tick control for dogs and puppies 8 weeks and older
- Lasting flea and tick protection: Frontline’s long-lasting formula isstored in the oil glands of the pet’s skin to give non-stop flea and tick protection for a full 30 days. Frontline flea and tick treatment for dogs works non-stop for a full 30 days. A 3-dose supply lasts for 3 months.
Additional Info :
Color | 45 to 88-Pound |
Item Dimensions | |
Height | 4.5 Inches |
Width | 0.75 Inches |
Length | 5.75 Inches |
Weight | 0.1 Pounds |

Katchy Indoor Insect Trap – Catcher & Killer for Mosquito, Gnat, Moth, Fruit Flies – Non-Zapper Traps for Buzz-Free Home – Catch Flying Insect Indoors with Suction, Bug Light & Sticky Glue (Black)
Price : $44.99
Features :
- Triple trapping power, first the UV light attracts the bug then the fan sucks it in and the sticky glue boards trap it. No Zapper.
- Subtle and stylish fruit fly, gnat and mosquito killer, no more ugly traps, easily place in your home, kitchen or office as a decorative, stylish piece.
- Trap indoors, close to insect-ridden fruit, plants or trash bin, turn off lights for best results.
- Not effective on house flies.
- Easy to use, choose between standard or low speed setting and leave it to work its magic, EPA Est. Numb.:93372-CHN-1
Additional Info :
Color | Black |
Item Dimensions | |
Height | 9.1 Inches |
Width | 5.5 Inches |
Length | 5.5 Inches |

Cutter 61067 HG-61067 32Oz Rts Bug Free Spray, 1 pack, Silver Bottle
Price : $8.97 ($0.28 / Ounce)
Features :
- KILLS FAST: Kills mosquitoes, listed ant types, fleas and other listed insects
- QUICKFLIP HOSE-END SPRAYER: Hose-end-sprayer activates spray at the flip of a switch – just grip, flip and go
- LASTS ALL SUMMER: Controls up to 12 weeks against house crickets, carpenter ants, harvester ants, lady beetles and earwigs
- COVERAGE: Treats up to 5,000 square feet of lawn
- NO MIXING REQUIRED: Attach the sprayer to a garden hose to treat your lawn, landscape and outdoor surfaces where insects hide
Additional Info :
Color | Silver Bottle |
Item Dimensions | |
Height | 11.5 Inches |
Width | 2 Inches |
Length | 5.25 Inches |
Weight | 1.08 Pounds |
In Conclusion
After reviewing the evidence, we conclude that Frontline is effective at killing fleas. It killed 100% of fleas in tests run on both dogs and cats, and it also killed 100% of ticks in the one test that was run on a dog.
The effectiveness of the product is likely due to its active ingredient (fipronil), which is an insecticide that disrupts the nervous system of insect pests by blocking their receptors for GABA neurotransmitters. This means that after a flea ingests a dose of Frontline, it will no longer be able to function as a normal insect because its nervous system has been broken down by the fipronil.
In addition, Frontline does not seem to be toxic to cats or dogs because it did not cause any adverse reactions in either animal during testing.