4Fleas Tablets for Dogs & Cats

4Fleas Tablets for Dogs & Cats 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 3 Cat (1-11kg) » Pack Of 3
Cat (1-11kg) » Pack Of 6 Cat (1-11kg) » Pack Of 6 Cat (1-11kg) » Pack Of 6
Dogs (Over 11kg) » Pack Of 3 Dogs (Over 11kg) » Pack Of 3 Dogs (Over 11kg) » Pack Of 3
Dogs (Over 11kg) » Pack Of 6 Dogs (Over 11kg) » Pack Of 6 Dogs (Over 11kg) » Pack Of 6
Small Dogs & Puppies (1-11kg) » Pack Of 3 Small Dogs & Puppies (1-11kg) » Pack Of 3 Small Dogs & Puppies (1-11kg) » Pack Of 3
Small Dogs & Puppies (1-11kg) » Pack of 6 Small Dogs & Puppies (1-11kg) » Pack of 6 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 £5.99
  • Cat (1-11kg) » Pack Of 6 £9.49
  • Dogs (Over 11kg) » Pack Of 3 £6.49
  • Dogs (Over 11kg) » Pack Of 6 £10.00
  • Small Dogs & Puppies (1-11kg) » Pack Of 3 £5.50
  • Small Dogs & Puppies (1-11kg) » Pack of 6 £9.49

Selection of 6 products from

£5.50 to £10.00


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 - 6:00pm
  • Sat: 9:00am - 1:00pm
  • Email: [email protected]

All prices include VAT where applicable.

Reviews (56)

Summary of Reviews for 4Fleas Tablets for Dogs & Cats

Overall 4
Ease Of Use
Value For Money
Absence Of Side Effects
50 out of 56 (89%) customers would recommend this product.
5 stars (38 reviews)
4 stars (10 reviews)
3 stars (2 reviews)
2 stars (1 reviews)
1 stars (5 reviews)

Only verified purchasers of this product can leave a review.

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

55 Very good
Verified Purchase

By on 10 December 2019

A stray cat from the neighbouring small holding has taken up residence in our barn.
We started feeding it, with permission, and was able to de flea him with 4Fleas Tablets. He is now a big clean cat and we are able to get to stroke him sometimes. I will use the tablets every month to keep him healthy.

Customer recommends this product

1 person found this review helpful

55 Fleas
Verified Purchase

By on 15 November 2019

Bought these for a stubborn flea problem. Used in conjunction with a different fleas drop product. Three weeks on and all is good.

Customer recommends this product

1 person found this review helpful

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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.

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.


10 July 2018 at 6:36pm

Dosage for dogs


It seems strange to me that the dosage for puppies and/or dogs under 11 kgs is exactly the same as for larger dogs. I'd have thought more body weight would require a higher dosage. If the dosage is the same for all of them, why is there a need to mention weight on the pack at all?

  • VioVet Staff

The tablets for large dogs contain 57mg of Nitenpyram and the tablets for small dogs and puppies contain 11.4mg of Nitenpyram so the larger dogs are receiving a higher concentration of active ingredient per tablet.

12 April 2017 at 11:04am

Kittens under 1kg but over 4 weeks


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

  • VioVet Staff

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.

30 July 2016 at 1:13pm

Other flea products


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

  • VioVet Staff

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.

30 July 2016 at 8:48am

Flea tablets and spot on

Debbie Simpson

  • VioVet customer since 2016
  • From: South Yorkshire, United Kingdom

Can I use flea tablets and frontline spot on together

  • VioVet Staff

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.

1 September 2015 at 11:07pm

What are the ingredients?

Wendy Priestley

  • VioVet customer since 2013
  • From: Kent, United Kingdom

What do the tablets contain? And are they palatable?

  • VioVet Staff

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.

7 August 2015 at 9:18pm

Large dogs


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

  • VioVet Staff

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

10 July 2015 at 6:12am

Can these 4fleas be used on pregnant cats?


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

  • VioVet Staff

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.

3 April 2015 at 6:55pm



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

  • VioVet Staff

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 Spray is a popular choice.

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