9.6/10 on Trustpilot with 47k+ reviews!
30mg tablets » Priced per Tablet
60mg tablets » Priced per Tablet
Solution 4% » 30ml Bottle

  • 30mg tablets » Priced per Tablet £0.19
  • 60mg tablets » Priced per Tablet £0.40
  • Solution 4% » 30ml Bottle £20.50

Selection of 3 products from

£0.19 to £20.50


Epiphen is the most commonly used medication to control fits in dogs resulting from idiopathic epilepsy in the UK. A dose is given twice daily, usually for the rest of the animal's life. Epiphen can be used alone or in conjunction with other medicines. Regular blood tests are recommended to ensure that blood levels of phenobarbitone are appropriate for treatment, and to check for any possible signs of liver trouble. Epiphen side effects are seen on occasions (the main one being liver damage), but these are normally mild as long as blood tests are performed periodically by your vet to monitor treatment progress. Epiphen is a controlled drug and so certain restrictions apply to its sale. However if you get a written prescription for Epiphen from your vet, Viovet can supply it to you. Place your order online or over the telephone, then send us the original prescription by post. We will send you the Epiphen as soon as we have received the order and prescription.

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, such as Insulin, 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. The majority of light weight orders (less than 1.5kg) can be delivered for a flat rate of £10. For an accurate estimate of the delivery charge, please put the items you require in your basket and use the "Estimate Delivery" system on the shopping basket page (you only need to enter your country and postal/zip code) for a quick quote. For deliveries to the USA you may need to go to the checkout page and enter your full address to get a quote (as some services need your state in order to quote too). For more information on international deliveries, please see our delivery information page.

Delivery of aerosols

Due to air freight restrictions aerosols cannot ever be sent abroad by Royal Mail. We appreciate your understanding.

Delivery of temperature controlled items

Some products, such as insulin 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 (17)

Q & A

Below are some recent questions we've received regarding Epiphen, including answers from our team.

8 December 2015 at 10:24am

Epiphen liquid , my dog hates the taste


My pup has 0.05 of liquid and hates the taste .
I've tried adding it to food but she's started to refuse to eat it . Trying to get it straight into her mouth from the syringe is a bit hit and miss . I'm worrying that she's not always getting the correct dose . Epiphen in tablet form only seems to be available in 30mg and 60mg is this correct ?

  • Non-Executive Director

There is a different brand of the same drug called Phenoleptil. This also has a veterinary license, the same as Epiphen. It comes in 12.5mg tablets and 50mg tablets. The 12.5mg tablets are very small and are normally easy to give to very small dogs. They can even be divided if needed, but this is tricky because they are very small anyway.

11 October 2014 at 12:37pm

My dog was mis prescribed epiphen


The out of hours vet mis prescribed epiphen as said my dog might have epilepsy but it actually turned out to be poisoning. She took three tabs at 60mg each but since taking has been raiding the kitchen bin, never done before and today she tried to hump my brothers dog, never had this behaviour before. Could even three tablets have had this effect it seems too coincidental to not have something to do with the drugs, she's a 16 month Labrador. Thank you

  • Non-Executive Director

Epiphen does often cause a slight increase in hunger. This might be exaggerated in a notoriously greedy breed such as a Labrador. It should soon wear off though. The attempted mounting of another dog is a bit more difficult to explain, but Epiphen does affect behaviour to some extent. Again I would expect this to be temporary, though Labs at 16 months often tend to get randy in fact. I do feel that any effects of the Epiphen will wear off over the next few days.

22 January 2014 at 2:07pm


Paula Isgrove

My dog was recently given the wrong dose by my vet of epiphen. Instead of 45mg daily she was taking 90mg. She was given 60mg tablets instead of 30mg tablets. She takes one 1/2 tablets a day. I was wondering other than the blood test taken if there is anything else the vet should have done. Her weight is 5.4 kg and her kidney results were a lot lower than they had been before my vet said this was not due to the pills but after what I have read I believe it is due to that and was worried about any permanent damage this dose could have caused! She had been issued 6 months of medication and was on this dose for 6 months.

  • Non-Executive Director

Some dogs appear to be more sensitive to Epiphen side effects than others. There are many dogs which have been on high doses for many years and not suffered any apparent ill effects at all. Some dogs will show signs of liver failure even if they are on a moderate dose for a year or two. Kidney damage is less likely. There is in fact no fixed correct dose, there is a dose range and they are given partly to effect, judging from the frequency of any fits which still occur, as well as blood levels of the drug. The truth is it is impossible to say if any permanent damage might have been done to your dog, but if there are no significant signs of damage now, I think it is extremely unlikely that your dog will suffer any ill effects now or in future. Essentially as long as you have got your dog onto the correct dose now and your dog seems fine now, then I would not be overly worried. Periodic blood tests to monitor for signs of liver damage are advised anyway for dogs on Epiphen (or any phenobarbitone medication). I would advise that you should do that test in no more than 3 months from now, then every 6 months in future. Other than that, I would not be concerned.

14 August 2013 at 2:19pm


Samantha Foxall

  • VioVet customer since 2013
  • From: West Midlands, United Kingdom

my dog is on 2 1/2 tablets (60mg)twice a day. There is no scoring on the tablet which I believe indicates it should not be halved. Is this correct and are there any side effects to halving the tablet.
If this cannot be halved why has my vet recommended this dosage?

  • Non-Executive Director

Vets will sometimes suggest halving tablets to make it easier in some way, or cheaper to purchase medication. With Epiphen it is marginally cheaper to give half a 60mg tablet than a 30mg tablet, though not by very much. Possibly your vet was trying to be helpful, but you would have to ask him/her. Epiphen tablets are not intended to be divided and the company recommends using the smaller tablets, or the solution, if lower doses need to be given. This is more for accuracy of dosing than anything else. If the tablets are divided accurately, they should be safe and effective. Some people do divide tablets but it is not ideal. If you want to order 30mg tablets then we would be able to supply the appropriate number of tablets for you on your existing prescription, but first would have to get your vet's confirmation that this is OK by telephone. We cannot change the total amount (mg) of drug permitted on the prescription though.