Cats are the best. They’re cute and cuddly, they can be playful and funny, and they’re usually pretty low-maintenance (if you get them from a shelter or rescue group). But there are certain things that cats can’t help: namely, fleas. Fleas are tiny little insects that live in your cat’s fur. They feed off their blood and then lay eggs on the skin which hatch into adult fleas who then start all over again by feeding off blood from another host (like your cat) or even another species (like humans). If left untreated for too long, flea infestations will eventually kill a cat as their bodies become overwhelmed by the insects’ bites, and diseases spread through their bloodstreams thanks to all those pesky bites.

Fleas are a common problem for cats in many parts of the world. They can transmit disease to humans and pets, so it’s important to take steps to keep your cat flea-free. If you live in an area where fleas are prevalent, you may want to consider using an oral flea medicine for cats.

Oral flea medicines for cats are applied directly into the mouth of your pet, where they work to kill fleas that your cat has ingested. Oral flea medicines tend to be more effective than topical treatments, but they also come with some potential side effects. It’s important to know what these are before deciding whether or not you want to use an oral flea medicine on your cat.


Capstar is a tablet that kills fleas within 30 minutes. It is effective for 7 days and safe for kittens over 2 months old. It is also safe for pregnant and lactating cats.


Bravecto is a chewable tablet that contains a fluralaner, an insecticide that kills fleas and ticks on contact. It’s only approved for use in dogs six weeks of age or older, so it’s not suitable for puppies. Although Bravecto is approved for use in cats, the manufacturer does not recommend it for felines.

Of all the oral flea medicines we looked at, Bravecto has been shown to be effective against most tick species (black-legged ticks, American dog ticks, and brown dog ticks) as well as fleas from day one up until three months later.

Advantage II

Advantage II is a topical flea treatment available in various sizes. It’s waterproof, so your cat can go swimming while still being protected from fleas. It kills fleas within 24 hours and prevents them from laying eggs.


Revolution is a monthly topical treatment that is effective against fleas, ticks, and heartworm. The drug has been proven to kill 100% of fleas within 24 hours and it also kills adult heartworm. It can be used on kittens over 8 weeks of age as well as dogs and cats.

The safety profile for the drug includes a wide margin of safety for use in pregnant or lactating animals, making it an excellent choice for those caring for multiple pets in the home who may be at risk.

Nexgard Spectra

Nexgard Spectra is a chewable tablet for cats that kills fleas and ticks. It is a once-a-month treatment, safe for cats 8 weeks of age and older, and not for use in humans.

This medicine prevents flea infestations on your pet. It also kills the fleas already on your cat, protecting him from future infestations. Nexgard Spectra also treats and controls American dog ticks (Dermacentor variabilis), brown dog ticks (Rhipicephalus sanguineus), lone star ticks (Amblyomma americanum), and deer ticks (Ixodes scapularis).

This article outlines some of the best oral flea medicines for cats.

This article outlines some of the best oral flea medicines for cats. There are many options, some of which are more effective than others and some of which are more cost-effective than others. These products will work only if you administer them on a regular basis to your cat and then comb through his fur with a flea comb or similar tool to remove any remaining eggs or larvae from the skin.

There is no single product that will kill all the fleas, but the following list provides several good options:

  • Revolution (selamectin)
  • Frontline Plus (fipronil)
  • Advantage II (imidacloprid and moxidectin)

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