4Fleas Tablets for Dogs & Cats

4Fleas Tablets for Dogs & Cats
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Cat (1-11kg) » Pack Of 3
Cat (1-11kg) » Pack Of 6
Dogs (Over 11kg) » Pack Of 3
Dogs (Over 11kg) » Pack Of 6
Small Dogs & Puppies (1-11kg) » Pack Of 3
Small Dogs & Puppies (1-11kg) » Pack of 6

Images are for illustration purposes only. Packaging may change from time to time and images on our website may or may not be updated.

  • Cat (1-11kg) » Pack Of 3 £5.65
  • Cat (1-11kg) » Pack Of 6 £9.69
  • Dogs (Over 11kg) » Pack Of 3 £6.65
  • Dogs (Over 11kg) » Pack Of 6 £10.39
  • Small Dogs & Puppies (1-11kg) » Pack Of 3 £5.65
  • Small Dogs & Puppies (1-11kg) » Pack of 6 £9.69

Selection of 6 products from

£5.65 to £10.39


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

Need help or advice? Contact us:

  • Landline: 01582 842096
  • Mon - Fri: 8:00am - 5:45pm
  • Sat: 9:00am - 1:00pm
  • Email: [email protected]

All prices include VAT where applicable.

Reviews (58)

Summary of Reviews for 4Fleas Tablets for Dogs & Cats

Overall 4
Ease Of Use
Value For Money
Absence Of Side Effects
52 out of 58 (90%) customers would recommend this product.
5 stars (38 reviews)
4 stars (11 reviews)
3 stars (3 reviews)
2 stars (1 reviews)
1 stars (5 reviews)

Only verified purchasers of this product can leave a review.

45 Flea tablets
Verified Purchase

By on 18 December 2021

Product ok . Cat still scratching but less than before

Customer recommends this product

35 Alternative to spot on
Verified Purchase

By on 27 July 2021

I am not sure how effective this was as opposed to spot on, but my cat is terrified of spot on since a trip to the vet and I was able to give this in cat putty

Customer recommends this product

45 flea tabs
Verified Purchase

By on 7 December 2020

very good I think better than some of the other treatments that I have used.

Customer recommends this product

45 Flea Treatment
Verified Purchase

By on 27 September 2020

Very happy with this product thank you.

Customer recommends this product

55 Flea tablets
Verified Purchase

By on 10 September 2020

Worked very well. I use spot on products but as a working dog he still picks up the odd visitor and these tablets really helped me get on top of the problem.

Customer recommends this product

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Q & A

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

6 September 2021 at 1:17pm

Wash the cat in the same day after treatment?


Hi,can i wash the cat in the same day I give her this tablet for fleas Johnson's 4fleas Tablets for Cats and Kittens ?i brought a kitten yesterday but she have fleas and she is very dirty .thank you

  • VioVet Staff

Yes you can wash your cat and give these flea tablets, it should not affect the efficacy. I recommend reading our blog 'Help - my pet's got fleas!' for a comprehensive guide on clearing the issue. Tablets like 4Fleas are great as part of a good flea treatment protocol but will not clear the infestation if used alone.

29 August 2021 at 12:25pm


Lyn Morey

How many doses can an adult cat have

  • VioVet Staff

This product is dosed as follows:
Administer treatment whenever fleas are spotted on the animal. Maximum of 1 administration of tablets per day.
This means you can dose at most once daily as many times as you like. However I strongly advise using a preventative product instead of just repeat dosing with this product. 4Fleas contains an ingredient that will last a day or so and NOT prevent against fleas. Spot on flea treatments like Advantage or Frontline Plus are advised instead for the long term.

7 July 2021 at 4:46pm



What is the active ingredient of these tablets please?

  • VioVet Staff

4Fleas tablets contain nitenpyram.

26 June 2021 at 7:37am

Does tablet cover mites and ticks?

Jenny & Mouse

Mouse spends her life hunting in the fields and woods around us. Will this tablet cover everything she is likely to encounter...and eat?

  • VioVet Staff

These tablets only treat fleas, not mites and ticks. And it will not prevent against fleas. It is only active for the day or two after dosing. it is very effective at killing fleas on your cat in this time but it will not last for longer than this and so is not a suitable prresventative.
If you are looking for a preventative product against fleas/ticks then I advise checking out Frontline Plus or Seresto. Unfortunately there are no over the counter products that protect against mites, you will need a prescription from your vet to use a mite preventative.

10 June 2021 at 8:11pm


Brenda Gore

Do these tablets kill mites as well?

  • VioVet Staff

These tablets kill fleas only, unfortunately there are no over the counter products that will kill mites. If your pet has a mite infestation then I recommend contacting your vet for a written prescription for an appropriate medication.

27 April 2021 at 1:54am

Flea tablets


Got a cat with big adult fleas, the flat is treated the cat uses frontline with no results and now I’m thinking to add this flea tablets if that’s ok for the cats health, want to know how long the tablet you give it lasts for. Is it really that safe to give a cat internal treatment every day without harming internally the cat?, I’m stressed I’m feeling as itchy as the cat and been bitten by the fleas to.

  • VioVet Staff

I recommend reading our blog 'Help - my pet's got fleas!' for a full guide on how to clear the issue. Frontline should work to help treat the issue but it can take 2 or 3 months of treating all pets and the household to clear an infestation. This guide explains that in more detail.

4Fleas tablets contains nitenpyram which will last a day or so in the body, killing fleas that bite very effectively. It will not resolve an infestation if used alone though and its really important to treat as advised in the blog above.

9 April 2021 at 12:33pm

In conjunction with Levetiracetam

Lisa McMahon

Hi, can 4fleas tablets be used if a cat is taking Levetiracetam?

  • VioVet Staff

There are no contra-indications in the datasheet for this product with regards to using it alongside any other medications, so using it alongside Levetiracetam should be fine. I recommend contacting your prescribing vet though as without the full clinical history I cannot be 100% certain of this.

31 March 2021 at 8:55pm

Pregnant dog

Catherine A Lee

Can 4fleas be used on pregnant dogs?

  • VioVet Staff

Johnson's 4fleas tablets can be safely used in pregnant or lactating females and breeding dogs.

3 May 2020 at 9:05am

Can i use these on cats that are nursing?

Michelle baars

One of my cats is nursing and the other might be pregnant but is it safe to give them the tablet

  • VioVet Staff

Hi Michelle

Thanks for getting in touch.
Yes Johnsons 4Fleas for cats can be safely used in a pregnant or lactating cat.

I hope this helps.

15 October 2018 at 2:04pm

Dog size


I have a 12 year old beagle .what size is it classed as.as tablets 4 fleas are for lrg or small.

  • VioVet Staff


Thank you for getting in touch.

If your beagle is between 1-11kg then you would need small, anything over 11kg needs large.

Hope that helps.


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