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4Fleas Tablets for Dogs & Cats

  • Cat (1-11kg) » Pack Of 3 £3.89
  • Cat (1-11kg) » Pack Of 6 £7.00
  • Dogs (Over 11kg) » Pack Of 3 £4.60
  • Dogs (Over 11kg) » Pack Of 6 £7.49
  • Small Dogs & Puppies (1-11kg) » Pack Of 3 £3.89
  • Small Dogs & Puppies (1-11kg) » Pack of 6 £7.00

Selection of 6 products from

£3.89 to £7.49

Powerful, quick acting and impressive, 4Fleas Tablets are a powerful flea treatment administered orally. As the first fully licensed, over the counter oral flea treatment for cats and dogs, 4Fleas is a market leading flea product that kills all fleas on cats and dogs within 24 hours. With no contra-indication, 4Fleas has no side-effects and leaves no pesticidal residues in the fur or around the home. Suitable for use in conjunction with other flea and worming treatments, 4Fleas can be given to puppies and kittens over 4 weeks old (over 1kg). 100% safe to have contact with a pet treated with 4Fleas Tablets.

In addition to this flea treatment you may require an additional household spray to combat fleas which may not have yet hatched or dormant fleas in and around the house. Please click here to see the range of household sprays available.


  • Cannot be washed off or groomed out
  • Effective for 48hrs
  • 4fleas tablets are the only oral non insecticidal flea killing treatment in the OTC market
  • 4fleas tablet is rapidly absorbed into the bloodstream of the cats and dogs
  • With 4fleas tablets, fleas only need to feed once before they are killed
  • 4fleas tablets interfere with the nervous system of the flea, rapidly causing hyperactivity, paralysis and then death
  • With fleas feeding every 15 to 20 minutes and only needing one feed to cause death, the opportunities of flea egg production are dramatically reduced
  • Pregnant mums and parents of small children often have concerns about the use of insecticides that can rub off on contact. This cannot happen with 4Fleas tablets


Administer treatment whenever fleas are spotted on the animal. Maximum of 1 administration of tablets per day.

Animal & weight Product Name Amount per administration
Cat Cat (1-11kg) 1 tablet per day
Puppies & dogs up to 11kg Small Dogs & Puppies (1-11kg) 1 tablet per day
Dogs over 11kg Dogs (Over 11kg) 1 tablet per day

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Reviews of 4Fleas Tablets for Dogs & Cats

Read our customers' reviews of 4Fleas Tablets for Dogs & Cats

Questions & Answers for 4Fleas Tablets for Dogs & Cats

Below are some recent questions we've received regarding 4Fleas Tablets for Dogs & Cats, including answers from our team.

Ask Your Own Question

Kittens under 1kg but over 4 weeks

12th Apr 2017

Can 4flea tablets be used for kittens who are 8 weeks and weighing 850 & 900 grams? I was going to use half a tablet but need to know if that's safe. The kittens are in good health, thanks

  • Veterinary Advisor

Giving half a tablet is likely to be fine although may not be enough to be effective where 1 tablet would be too much. I would advise using Fiproclear Spray since this can be used on any size of kitten from 2 days old.

Other flea products

30th Jul 2016

Can I put a standard 'spot on' on my pets after using this product to protect them for a longer period of time? I like how quickly these tablets kill the fleas but I would like to ensure that they do not get any more whilst I'm treating the home. Thanks

  • Non-Executive Director

Yes you can do this and it makes perfect sense. Combining the tablets, spot-on and household spray is a very good idea. The only thing I would say is that even all of this may not get rid of all fleas immediately. Some eggs and larvae etc can be left all over the place and all of the products have a very high kill-rate for fleas, but they are not nuclear bombs. In order to keep them safe for cats and people, they cannot be as potent as we might like. They will do their job pretty soon though.

Flea tablets and spot on

30th Jul 2016
Debbie Simpson
  • VioVet Customer Since: July 2016
  • From: South Yorkshire, United Kingdom

Can I use flea tablets and frontline spot on together

  • Non-Executive Director

These products can indeed be used together. The tablets should give a complete initial kill and the Frontline will help to provide more lasting protection. Ideally you should spray the house with a suitable insecticide too if fleas are a real problem. It is surprising how long it can take to get rid of all the fleas in a location if they have built up a large population.

What are the ingredients?

1st Sep 2015
Wendy Priestley
  • VioVet Customer Since: May 2013
  • From: Kent, United Kingdom

What do the tablets contain? And are they palatable?

  • Non-Executive Director

The tablets contain the insecticide nitenpyram and they are reasonably palatable to most dogs and cats if mixed with food. They are not tasty enough to be given as treats. Individuals vary of course in how well they accept them. A tablet is extremely effective for 1-2 days, but it wears off rapidly after that.

Large dogs

7th Aug 2015

My dog weighs 35 kg how many tablets should I give him?

  • Non-Executive Director

The dose for any dog over 11kg bodyweight is just one of the standard tablets.

Can these 4fleas be used on pregnant cats?

10th Jul 2015

Can 4fleas b used on pregnant cat?
Also what worker can also be used?

  • Non-Executive Director

There is a general presumption against giving any medication during the first third of pregnancy. Ideally you should try to observe this. Having said that, this product is regarded as safe to use during pregnancy and you should be safe to do so.


3rd Apr 2015

Can I give these tablets to my cats on a regular basis to keep them flea free ? if so can you tell me how often and how many

  • Web Developer

The tablets can be given regularly, at a maximum of 1 tablet per day. It is also advisable to use a household treatment at the same time as although these tablets will kill the fleas on your cat, there still may be fleas in carpets, bedding or furnishings that the fleas may be, which may then get back onto your cat at a later point. Virbac Indorex Household Flea Spray is a popular choice.

Dog and cat

29th Oct 2014

I have a cat and a dog I'd like to treat , can my animals be harmed by the product once treated, ie if my dog licks my cat or vice versa can they be harmed?

  • Non-Executive Director

There is no concern about another pet licking the treated pet. This product is very safe and you do not need to be unduly concerned. However to control the fleas, you will probably also need to treat the environment with a household spray like Indorex to reduce the numbers of more fleas jumping on your pets.


19th Feb 2014

How often do,you need to give these tablets?

  • Non-Executive Director

There is no fixed answer to this question, because it depends on how many fleas there are in the environment of the pet. These tablets appear to be very effective indeed for any fleas on the animal at the time of giving the tablet, but they provide no lasting protection at all. This helps to make them safe for your pet as the drug does not persist in the body, but if a flea jumps onto your pet the day after treatment, that flea might be completely unaffected. The modern spot-on treatments persist for a few weeks, killing fleas for the whole time. These flea tablets are probably more effective for a few hours and might well kill every flea, but then they rely on you spraying around the house etc with a household insecticide to kill any other fleas present. The tablets are particularly good for treating a new pet before bringing it into a new home, and for combining with environmental flea treatments (including Program, which is also a tablet and very safe for pets).