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 £6.75
  • Cat (1-11kg) » Pack Of 6 £11.25
  • Dogs (Over 11kg) » Pack Of 3 £7.65
  • Dogs (Over 11kg) » Pack Of 6 £11.95
  • Small Dogs & Puppies (1-11kg) » Pack Of 3 £6.75
  • Small Dogs & Puppies (1-11kg) » Pack of 6 £11.25

Selection of 6 products from

£6.75 to £11.95

Description

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.

Benefits

  • 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

Dosage

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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All prices include VAT where applicable.

Reviews (72)

Summary of Reviews for 4Fleas Tablets for Dogs & Cats

Overall 4
Effectiveness
Ease Of Use
Value For Money
Absence Of Side Effects
65 out of 72 (90%) customers would recommend this product.
5 stars (45 reviews)
4 stars (16 reviews)
3 stars (4 reviews)
2 stars (1 reviews)
1 stars (6 reviews)

Only verified purchasers of this product can leave a review.

Anti flea fror my Cat
Verified Purchase

By Ani Dee on 7 September 2025

Very good and effective product!

Customer recommends this product

4fleas tablets for cats
Verified Purchase

By Kay Dyer on 12 July 2025

I have used these for a few years and have found them to be easy to administer mixing with food and quick to kill fleas, usually within 15 minutes. Recommended.

Customer recommends this product

great
Verified Purchase

By Maggie Muir on 11 November 2024

This is an excellent product to use between the spot on flea treatments

Customer recommends this product

Tablets for semi feral visitor
Verified Purchase

By Paul Sawyer on 7 August 2024

As the cat is semi feral and does not appear to have a home have been crushing pills into food for the cat...drops out of the question at the moment as cat too nervous to allow such close contact.

Customer recommends this product

Worked perfectly
Verified Purchase

By Elliot Carr-Barnsley on 30 July 2024

Worked as instructed on two dogs with 8 breeds between them. Hid the whole tablet in some ham, which was swallowed whole. Between one and two hours later, both dogs were more vocal, and itchier and unsettled. Then very tired.
They both lay down for ages, during which time tens of hidden fleas stumbled off their fur and died.

Others were shaken out later (I had thought that it was nowhere near as bad).

Overnight the flea dirt was gone too.

Despite washing and hoovering everything in the house, one of the dogs picked up a couple more, so she's had another tablet. So they are extremely effective, but residual eggs and rogue house fleas may still emerge.

Cant fault the fast action though

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 July 2025 at 12:28pm

Do the tablets work?

Eugene

I’m trying to find out the effectiveness of the flea treatment?

  • VioVet Staff

4Fleas Tablets for Dogs & Cats are an over-the-counter oral flea treatment that effectively kills adult fleas within 24 hours of administration. They work by rapidly being absorbed into the bloodstream, where they interfere with the flea's nervous system, causing paralysis and death after a single feed. This mechanism significantly reduces the opportunity for flea egg production, which can help in controlling infestations.

27 June 2025 at 8:03am

Preventative?

K Evans

  • VioVet customer since 2013
  • From: East Sussex, United Kingdom

Hi, can this be used as a prevention measure? Or only if there are definitely fleas present?

  • VioVet Staff

4Fleas Tablets for Dogs & Cats are designed as a fast-acting treatment rather than a long-term preventative.

You'll need to combine it with a monthly-treatment for a prevention measure.

16 February 2025 at 9:35am

Administering 4Fleas

Ani Dee

  • VioVet customer since 2023
  • From: Oxfordshire, United Kingdom

How do I administer 4fleas tablets to my cat?

  • VioVet Staff

Gently tilt their head back. gently open their mouth using a finger on their incisor (front) teeth – avoid those sharp canines. pop the tablet in their mouth (towards the back of the tongue) and close their mouth. Stroke their throat downwards to encourage them to swallow – lip licking is usually a sign of success.

19 November 2022 at 6:57am

Flea tablets

Jade Canning

  • VioVet customer since 2021
  • From: Cheshire, United Kingdom

Can this be used to prevent fleas in cats that don't have them

  • VioVet Staff

This tablet will not have a long lasting effect and so is not suitable for preventative use, only for treating an exisiting issue.
If you are looking for a preventative flea product then the only over the counter options are spot ons. Examples include Advantage or Frontline Plus.

20 June 2022 at 7:34am

Other animals

Eli

Would it help a wild hedgehog, that we feed nightly and that we see on our camera scratching like mad?

  • VioVet Staff

This product is licensed for use in dogs and cats only, any use in other species is not advised and may be dangerous. It is recommended you contact your local wildlife center to discuss how you can help in this instance.

6 September 2021 at 1:17pm

Wash the cat in the same day after treatment?

Claudia

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

Tablets

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

4FLEAS TABLETS

Gigi

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

Mites

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.

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