Best Flea Medicine For Cats (Updated for 2018)

best flea medicine for cats

Cats can be a great addition to the family. They are relatively easy to look after and don’t need anywhere near as much attention as puppies. They clean up after themselves, are housetrained with very little effort, and are the perfect friends to have around the home. Of course there are some things your cat needs from you- investing in the best flea medicine for cats is a big must. With their fondness of exploring they can very easily pick up fleas that you will need to take precautions against.


Fleas can make your cat feel uncomfortable, sore and itchy, and can cause serious health risks if left untreated. To avoid this, you can use flea medication where just a few drops or a tablet can protect your furry friend from any of these problems. There are, though, lots of different products available so we have put together this buyer's guide to help you decide.

Best Flea Medicine For Cats Comparison

Cat Flea Medicine Background

Fleas are a painful and potentially dangerous problem that pet owners face, and must be dealt with as soon as possible. They can cause a wide range of health problems, and can be picked up from all of the places that cats like to visit. It is also vital for the health of you and your family that fleas are kept away as they can be extremely uncomfortable for you to have around too.

Flea medications come in a wide variety of types, and you need to decide exactly what you are looking for before you can decide which one to choose.

You can get ones that simply kill off all fleas that are present, provide your pet with long term protection against new fleas, and ones that protect against more than just fleas if you feel your cat is at risk from ticks and lice too.

Cat Flea Medicine Reviews


Bayer Advantage II Flea Control Treatment


  • Kills adult fleas, eggs, and larvae
  • ​Once-a-month application
  • ​Spot on product where liquid is applied
  • ​Still works after swimming or shampooing
  • Suitable for cats older than 8 weeks

This flea medicine for cats from Bayer includes 6 vials of easy to apply liquid that protects your cat from fleas for at least four weeks. The dosage is designed for cats that are older than eight weeks and weigh more than 9 pounds, but the company also provides other options for you if your cat is smaller. It kills fleas no matter what stage of the lifecycle they are in, and is designed to continue working even if your cat has gone for a swim, or is washed.


Of the various methods through which flea medication can be administered, drops are my personal favorite because of the ease of use. It can often be tricky to get your pet to eat a tablet, for example, so the ability to simply squeeze the vial of liquid onto their neck makes the whole process stress free. This particular formula deals with fleas no matter what stage of life they are in. It protects your cat for four weeks, and with regular use will ensure your cat remains flea free.




If you are looking for an easy to use product that will eliminate the problem of fleas, then this medicine from Bayer is worth a look. 


Capstar Novartis Flea Tablets


  • Flea medicine in tablet form
  • ​Suitable for cats and dogs between 2 and 25 pounds
  • ​Kills adult fleas
  • ​Box of six doses
  • ​Works within 4 to 6 hours

Capstar flea medicine for cats have been formulated to deal with fleas once your pet has become infested with them. They can be used on cats and dogs, and promise to kill all the adult fleas within 6 hours of one dose being administered.


This is a slightly different type of product, as it is designed for clearing up an outbreak of fleas, as opposed to providing protection against getting them. This is an important difference, and will affect whether this is the best cat flea medicine for you.


It is aimed at people who want to treat their pets after visiting places that risk exposure to fleas, or who want to treat new animals before introducing them to a flea free area (such as at a kennel or vets). One tablet will kill all the adult fleas on the pet within 6 hours to make your cat much more comfortable and happy.


This is a great product for treating the immediate problem, but will need to be used in conjunction with a long-term preventative medicine to stop your cat from becoming infected again, particularly if you live in an environment where fleas are a problem.



With having pets around the home you can soon find yourself dealing with a flea infestation. This is just a part of having animals around, and can be easily dealt with. If you are looking for medication to eliminate a problem you have, or suspect you may have, then this product could be exactly what you need. If it’s long-term prevention you are looking for, then this is not the one for you and you should look at the other products in this guide.


Advecta II Flea Treatment


  • Kills all stages of fleas
  • ​Provides cover for up to 4 months per treatment
  • ​Fragrance-free
  • ​Waterproof so it remains effective throughout any activity
  • Suitable for cats weighing over 9 pounds

The Advecta II flea treatment is a topically applied medicine that both kills fleas of all stages, and prevents your cat from picking them up in the first place. The package includes 4 vials of medicine to provide cover for four months.


This flea medicine for cats has been designed to deal with both aspects of flea problems; killing fleas that are already present and preventing any new ones from joining. It promises to kill all adult fleas, eggs, and larvae within 12 hours of applying the drops, and protect your cat from new infestations for a further 4 weeks.


Fortunately the product is waterproof too, so isn’t washed off at the first sign of activity. It will stay effective after swimming, rainstorms, baths, and shampooing, so as long as you apply it every month you will be safe in the knowledge that your cat is protected. It’s also good that it is fragrance free, unlike some other products, so your pet isn’t left with a nasty smell for days after being treated.


This particular version of the medicine provides you with enough to cover a cat that weighs over 9 pounds for four months. Advecta offers a wide range of solutions though, so no matter if you are looking to protect a cat or dog of any size, they will have a product suitable for you.



If you are looking for long-term preventative cover that is easy to administer, then this product from Advecta is worth considering. As with all topical products, it is vital that you try a small drop on your pets skin for a day to ensure they won’t have an allergic reaction before applying the full dose.


Merial Frontline Plus Flea And Tick Control


  • Protects against fleas, lice, and ticks
  • ​6 month supply
  • ​For all cats that are 8 weeks or older
  • ​Easy application
  • Waterproof

This flea medicine for cats from Merial gives you everything you need to protect your cat from all forms of fleas, lice, and ticks. It is a long lasting preventative measure that stops pets from getting infested in the first place.


Unlike other products that solely focus on the problem of fleas, this product has been developed to protect against the other pests that can cause problems too. It works in two stages- first by killing any fleas, flea eggs, chewing lice, and ticks that may be present when it is applied, and second by repelling any further ones from making their home on your cat. This ensures the ongoing well-being of your pet, keeping it happy and eliminating the health problems that can occur.


This is a ‘spot on’ product that simply involves snapping the top off a vial and emptying the contents onto your cat's neck. It will get to work straight away and clear any problem up within 12 hours. Each treatment then provides up to a month of protection. Within the box you get 6 vials, which is enough to keep you covered for six months. It is designed for cats of all breeds that are older than 8 weeks, although they offer a range of different types that are suitable for larger animals if that’s what you need.



This product is particularly good if you live in an area with increased risk of lice and ticks as well as fleas, but is a solid choice for any pet owner. As with all topical applications, though, it is important that you try a small amount on your pets skin for a day before administering the full dose to make sure they aren’t allergic to any of the ingredients. You should also only purchase the product from reputable sellers to ensure you receive the proper product and not a forgery.


PetArmor FastCaps Oral Flea Treatment


  • Easy to dose tablets
  • ​Starts to work within 30 minutes
  • ​Kills adult fleas
  • ​Suitable for cats between 2 and 25 pounds
  • 90% effectiveness within 6 hours

This product from PetArmor is another one that effectively deals with a current outbreak of fleas, but doesn’t provide any protection against them coming back again. It is suitable to be administered up to once per day, and kills all adult fleas within a few hours after consumption. The pack includes 6 tablets for use with cats or dogs that weigh between 2 and 25 pounds.


In situations where liquid applications on the skin are unsuitable or simply when a fast acting product is required to deal with an outbreak, tablets like these ones can be an effective solution. They don’t provide any long-term protection against fleas, but will kill all adult fleas that are present by using a chemical called nitenpyram.


This method of flea prevention is ideally suited for pets who aren’t normally exposed to areas where they can pick them up, but need assistance on the occasions that they do, or in places that house a lot of animals and need to ensure that none bring fleas with them (for example at a kennel or vets). They are safe to use alongside medication for other purposes, and are also safe to feed to pregnant or nursing animals.


Customers have left a lot of positive feedback about this product on Amazon because of its fast acting effect on fleas that can be seen falling off dead within a couple of hours. It can cause your animal to start scratching a lot more, but this is due to the fleas becoming agitated and passes once the treatment is complete.


If your pet is susceptible to sudden infestations or is allergic to liquid applications and you don’t want to use any long-term prevention, then this product is an ideal solution for you. It’s also great to use alongside other products to quickly clear up any problems, and is very effective at what it does. Be aware that it doesn’t provide protection against fleas coming back, though, so if this is something that is particularly important to you, you will need a different product.

Flea Medicine For Cats: The Final Verdict

Fleas can cause a whole range of problems for pets and owners alike, so it must be controlled to ensure a happy, enjoyable life for your cat. It’s an easy problem to deal with that involves medication as well as keeping your cat and the area they live in nice and clean.


For urgent problems one of the pill-based medications is most suitable, but our choice for the best flea medicine for cats is the Merial FrontLine Plus because of its long acting preventative formula that not only protects your pet from fleas, but also protects from lice and ticks.

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