Zentonil Liver Tablets for Dogs & Cats

Zentonil Liver Tablets for Dogs & Cats
Advanced 100mg » Pack of 30

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  • Advanced 100mg » Pack of 30 £54.49
  • Advanced 200mg » Pack of 30 £103.49
  • Advanced 400mg » Pack of 30 £133.99

Selection of 3 products from

£54.49 to £133.99


Zentonil is a nutritional supplement that serves as an aid in all situations where the liver is known or suspected to be under stress. Zentonil tablets are formulated for dogs and cats to help support liver function. The tablets can be split into halves or quarters and are best given with no food in the stomach (either 2 hours before or 2 hours after a meal)

Zentonil Advanced 100mg are for cats. For the correct option for your dog please see below and match up to what your dog weighs.

Zentonil contains SAMe as well as Silybin (from Milk Thistle). The Zentonil rate is 100mg of tablet per 5kg bodyweight

Zentonil Advanced tablets contain the pure, stable salt of S-adenosylmethionine (SAMe), developed specifically for veterinary use in dogs and cats. Thanks to patented and highly exclusive microencapsulation technology, tablets may be split, crushed or chewed without compromising SAMe bioavailability. They also have the added benefits of silybin.

SAMe particles are individually microencapsulated before the addition of silybin, to preserve bioavailability. The silybin in Zentonil Advanced is complexed with phosphatidylcholine, which has been shown to significantly increase bioavailability.

Feeding guidelines

The following table shows the daily feeding amount of tablets based on animal weight. The tablets can be split into halves or quarters and are best given either 2 hours before or after a meal.

Animal Weight Advanced 100 Advanced 200 Advanced 400
2.5kg ½
5kg 1 ½
10kg 2 1 ½
20kg 2 1
40kg 2

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All prices include VAT where applicable.

Reviews (4)

Summary of Reviews for Zentonil Liver Tablets for Dogs & Cats

Overall 5
Ease Of Use
Value For Money
Absence Of Side Effects
4 out of 4 (100%) customers would recommend this product.
5 stars (3 reviews)
4 stars (1 reviews)
3 stars (0 reviews)
2 stars (0 reviews)
1 stars (0 reviews)

Only verified purchasers of this product can leave a review.

45 Efficacy of Zentonil
Verified Purchase

By on 10 November 2021

The product appears to be working well and my old lurcher, diagnosed with severe liver failure has responded well and almost back to his old self.. It is expensive and although thankfully he is such a gentle dog,, the tablets are large and he doesn't like them.

Customer recommends this product

55 Effective and great product !
Verified Purchase

By on 12 January 2017

Recommend by my vet to help my dog as she suffering from cushing disease and other issue. Though this is not the main product to cure cushing disease but it really help her to support her liver & maintain it.

The price is reasonable compare to our local vet clinic .

Customer recommends this product

55 Good service and good results
Verified Purchase

By on 12 December 2015

Our old Lab's regular vet checks indicate that these tablets are having a beneficial effect and are helping to keep Maddy well. Many thanks.

Customer recommends this product

55 zentonil advanced
Verified Purchase

By on 13 August 2014

Good. River . . . . . My dog. Pain. .
Zentonil happr

Customer recommends this product

Q & A

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

28 April 2018 at 2:24pm

Milk thistle

Allyson Corrie

hi there my dog is already on this supplement recommended by my vet for increased alt levels would it be safe to also give milk thistle

  • VioVet Staff

Zentonil already contains milk thistle derivatives. You will not overdose by giving an additional milk thistle supplement but your dog may not gain any extra benefit. However it is safe to give both if you would like to try it.

15 July 2015 at 5:51pm

Zentonil versus Hepatosyl plus


My dog suffers with seizures as a result of excess bile on the liver... She is currently on Hepatosyl plus 200mg .. One a day but still has seizures every 3 months or so .. She is also on destolit that I get from you.. Do you think Zentonil would be any better for her.. My vet has said there is no more medication he can think of apart from what she's on ... She's nearly 13 and apart from the seizures is s happy little dog!! Thank you

  • VioVet Staff

I think that there is very unlikely to be any difference between the results you would get from these two products. It is up to you which you use, either should help. The only other thing which might make a bit of difference would be a liver support diet, such as Hills L/D. It might make some difference. Otherwise it would be up to your own vet to investigate for other possibilities really as he/she is familiar with your particular dog.

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