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Lactulose 3.3gr/5ml Constipation Solution

Lactulose 3.3gr/5ml Constipation Solution
300ml Bottle

  • 300ml Bottle £10.00
  • 500ml Bottle £16.00

Selection of 2 products from

£10.00 to £16.00


PLEASE NOTE: This is a human product. Lactulose Solution is a specially developed laxative designed for constipation. A synthetic Disaccharide formulation, Lactulose Solution is a sugar-based molecule which cannot be metabolised nor absorbed by the body. Instead, bacteria found in the gut breaks down Lactulose Solution into acids which then induce the hydration of the stool. Lactulose Solution also can promote Peristalsis, the natural movement of food through the intestine.

NOTE: The packaging of this product does regularly change.

Feeding Guidelines

Here are the doses for animals, but please note that this is a human product.

Dose for a cat, 0.5 to 5mls 2 or 3 times daily as required.

Dose for a dog, 5 to 25mls 2 or 3 times daily as required.

Treatment is normally aimed towards the production of 2 or 3 soft stools per day. Adjust the above doses as required according to effect.

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 restrictions aerosols can't be sent 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 (32)

Q & A

Below are some recent questions we've received regarding Lactulose 3.3gr/5ml Constipation Solution, including answers from our team.

30 January 2019 at 8:31pm

Constipation in cats


What is the recommended dose for a 3kg cat?

  • Website Content Developer

Hi Mollie,

Dose for a cat - 0.5 to 5mls - 2 or 3 times daily, as required.

Hope this helps,


19 March 2017 at 11:14am

Dosage for a 4 k dog

Maria Graves

What dose for a 4 kilo dog please?

  • Veterinary Advisor

I would start with 5mls 2 or 3 times a day. You can then adjust the dose to effect aiming for 2 or 3 soft stools per day giving as little of the lactulose as possible to achieve this.

20 October 2014 at 11:04am

What dose for a 45 kg german shepherd?

Alison Denning

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

Can you advise on dosage level for 45 kg dog on Tramadol please

  • Non-Executive Director

Initially 20 to 25mls by mouth 2 or 3 times per day. Then adjust the dose as needed to produce 2 (or 3) soft stools per day. Always give the lowest dose you can which is effective, but the side effects are basically diarrhoea, so this will not be a problem as you adjust the dose.

9 February 2014 at 11:40am

What dose for a 10kg dog

Christine price

My dog ate a small cooked pork bone yesterday, given by a friend, since then he has only passed very small stools, not at all his regular type. It is now 21 hours since he ate the bone, our vet is not answering his phone, & we are in Spain, when and what dosage of lactulose should I give him. We have Lactulose in our medicine cupboard. He is 2 1/2 years old, and very subdued. Many thanks Christine Price.

  • Non-Executive Director

Lactulose can be given at a dose of 10mls at a time, up to 3 times daily if needed. If your dog starts vomiting repeatedly, then that is very serious and he needs to see a vet. As long as he is not vomiting, then it is unlikely to be serious. Most dogs pass this sort of thing after a while. It can be uncomfortouble and sometimes a little blood is passed with the stools, but only the vomiting is a real concern. You should encourage him to eat small amounts and drink plenty of water.