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4Fleas Tablets for Dogs & Cats

4Fleas Tablets for Dogs & Cats
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 £4.79
  • Cat (1-11kg) » Pack Of 6 £7.99
  • Dogs (Over 11kg) » Pack Of 3 £5.99
  • Dogs (Over 11kg) » Pack Of 6 £8.99
  • Small Dogs & Puppies (1-11kg) » Pack Of 3 £4.79
  • Small Dogs & Puppies (1-11kg) » Pack of 6 £8.50

Selection of 6 products from

£4.79 to £8.99


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: 8:30am - 5:00pm
  • Sat: 9:00am - 1:00pm (Collections only)
  • Email: [email protected]

All prices include VAT where applicable.

Delivery Information

How quickly do you deliver?

Under almost all products on our website is an Estimated dispatch time, check this for a delivery prediction specific to the item you are looking to purchase. These badges are updated live based on the stock levels we have and also those of our suppliers - so are usually very accurate, but cannot be guaranteed. In more general terms, we aim to dispatch all orders within 1 working day of receiving payment (and a prescription if required). If we cannot do so within 3 working days we will contact you by email.

What do you charge for delivery?

For UK delivery, we charge the following:

Order Total Weight Delivery
£0-£28.99 Under 2kg £2.99
2kg+ £4.99
£29-£38.99 Under 2kg Free
2kg+ £4.99
£39+ Under 2kg Free
2kg+ Free

Prices quoted are for delivery to all parts of mainland UK except certain Scottish postcodes (where the price is higher for items sent by courier. Delivery of food abroad (including Channel Islands, N. Ireland and other islands around the UK) is charged at a higher price and free delivery is not available. Temperature controlled products are also not always subject to the standard and/or free delivery options.

For full information on our delivery charges, including prices on heavy deliveries to Scotland and abroad, see our delivery information page.

We can deliver most items to all around the world, but prices do vary. To find the exact cost of shipping your item, and to see all options available, follow these steps:

  1. Put the items you wish to order in your basket
  2. Proceed to checkout and enter your delivery address, including country
  3. Delivery information including price will automatically update to what is available to you

Delivery of aerosols

Due to restrictions aerosols can't be sent by Royal Mail. We appreciate your understanding.

Delivery of temperature controlled items

Some products, such as non-ambient items and frozen food, need to be delivered in insulated packaging to prevent them from getting too warm (or too cold) during transit from us to you. Purchasing any of these items in your order will result in a £1.99 charge being added to the total to cover the high cost of the insulated packaging materials. You only pay the £1.99 once per order, regardless of how many temperature controlled items you purchase in that order.

How do I cancel or return an order?

Please call us as soon as possible if you need to amend or cancel an order on 01582 842096. If your order has been processed for dispatch we will be unable to cancel or amend the order. You will however be able to return your product for a full refund*.

To return an item, you must contact us by phone or email to arrange this BEFORE posting any product back to us. We will explain the process at this stage for you.

*For full details on returns, see our terms and conditions page.

Reviews (51)

Q & A

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

15 October 2018 at 2:04pm

Dog size


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

  • Customer Service Advisor


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?

  • Veterinary Advisor

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

  • 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.

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

  • 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.

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

  • 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.

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?

  • 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.

7 August 2015 at 9:18pm

Large dogs


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.

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?

  • 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.

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

  • PHP 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.

29 October 2014 at 8:02pm

Dog and cat


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.