Consumer medicine information


Lactulose 10.0 g/15 mL Oral Liquid

Consumer Medicine Information


This leaflet answers some common questions about LACTOCUR.

It does not contain all the available information.

It does not take the place of talking to your doctor or pharmacist.

If you have any concerns about taking this medicine, ask your doctor or pharmacist.

Keep this leaflet with the medicine. You may need to read it again.


LACTOCUR belongs to a group of medicines known as laxatives.

LACTOCUR is used to treat chronic constipation. It can be taken by pregnant women.

It works by increasing the amount of water and stool bulk in the bowel, promoting normal bowel activity.

LACTOCUR can also be used to treat portal-systemic encephalopathy (PSE), also known as hepatic encephalopathy (a disease of the brain that occurs when the liver is not working properly. Symptoms are caused by too much ammonia in the blood). It works by lowering the level of ammonia in the blood.

LACTOCUR can be used where a soft stool is considered of medical benefit (haemorrhoids, anal surgery).

Ask your doctor or pharmacist if you have any questions about why LACTOCUR has been prescribed or recommended for you. Your doctor or pharmacist may have prescribed or recommended LACTOCUR for another reason.

There is no evidence that LACTOCUR is addictive.


When you must not take it

Do not take LACTOCUR if you:

  • Are allergic to lactulose, galactose, lactose or any other sugar.
  • Have galactosaemia
  • Have a disaccharidase deficiency
  • Are on a low-galactose or galactose-free diet
  • Are on a lactose-free diet
  • Have a bowel obstruction (blockage other than normal constipation)

Do not take LACTOCUR after the expiry date printed on the label or if the cap seal is broken. If it has expired or is damaged, return it to your pharmacist for disposal.

If you are not sure whether you should start taking LACTOCUR, talk to your doctor or pharmacist.

Before you start to take it

Tell your doctor or pharmacist if you have allergies to:

  • any other medicines.
  • any other substances, such as foods, preservatives or dyes.

Tell your doctor or pharmacist if you have or have had any medical conditions, especially the following:

  • diabetes
  • lactose intolerance.

Tell your doctor or pharmacist if you are breast-feeding or plan to breast-feed. Your doctor or pharmacist will discuss the possible risks and benefits of using LACTOCUR during breastfeeding.

LACTOCUR has no or minor influence on the ability to drive and use machines.

Do not give LACTOCUR to a child under the age of 14 years without medical supervision.

If you have not told your doctor or pharmacist about any of the above, tell them before you start taking LACTOCUR.

Taking other medicines

Tell your doctor or pharmacist if you are taking any other medicines, including any that you buy without a prescription from your pharmacy, supermarket or health food shop.


Follow all directions given to you by your doctor or pharmacist carefully. They may differ from the information contained in this leaflet.

If you do not understand the instructions, ask your doctor or pharmacist for help.

How much to take

Chronic Constipation
The usual starting dose for constipation in adults is 15-45 mL daily, and the maintenance dose is 15-30 mL daily.
It may take 1-2 days for LACTOCUR to work fully.

LACTOCUR should be given to children and infants under medical supervision. The usual doses are:

  • Children 7-14 years
    Initial dose (3 days): 15 mL
    days)Maintenance: 10 – 15 mL
  • Children 1-6 years:
    Initial dose (3 days): 5 – 10 mL
    Maintenance: 5-10 mL
  • Infants under 1 year:
    Initial dose (3 days): 5 mL
    Maintenance: 5 mL

As a general rule, patients with constipation should drink plenty of water and increase the amount of fibre in their diet.

Portal-Systemic Encephalopathy
The usual dose is 30-45 mL three to four times daily.

How to take it

LACTOCUR is a clear liquid to be swallowed. Swallow the medicine quickly. Do not keep it in your mouth.

Using a medicine measure will ensure you get the correct dose.

LACTOCUR may be taken diluted or undiluted.

When to take it

For constipation, LACTOCUR is best taken at the same time each day, preferably at breakfast time.

Follow the instructions given to you by your doctor or pharmacist.

How long to take it

Prolonged use of laxatives is undesirable. If symptoms persist, seek medical advice.

Continue taking LACTOCUR for as long as your doctor or pharmacist tells you.

If you forget to take it

If it is almost time for your next dose, skip the dose you missed and take your next dose when you are meant to.

Otherwise, take it as soon as you remember, and then go back to taking LACTOCUR as you would normally.

Do not take a double dose to make up for the dose that you missed. This may increase the chance of you getting an unwanted side effect.

If you are not sure what to do, ask your doctor or pharmacist.

If you have trouble remembering to take your medicine, ask your pharmacist for some hints.

If you take too much (overdose)

Immediately telephone your doctor or pharmacist or the Poisons Information Centre (telephone 13 11 26), or go to Accident and Emergency at your nearest hospital, if you think that you or anyone else may have taken too much LACTOCUR. Do this even if there are no signs of discomfort or poisoning.

Symptoms of an overdose are likely to be diarrhoea and abdominal cramps.


Things you must do

Tell any other doctors, dentists, pharmacists or other healthcare professionals such as naturopaths, who are treating you that you are taking LACTOCUR.

If you are about to be started on any new medicine, tell your doctor, dentist, pharmacist or other healthcare professional that you are taking LACTOCUR.

If you need to have a colonoscopy or proctoscopy, tell your doctor that you are taking LACTOCUR.

Things you must not do

Do not give LACTOCUR to anyone else, even if they have the same condition as you.

Do not take LACTOCUR to treat any other complaints unless your doctor or pharmacist tells you to.


Tell your doctor or pharmacist as soon as possible if you do not feel well while you are taking LACTOCUR.

LACTOCUR helps most people with chronic constipation, but it may have unwanted side effects in a few people. All medicines can have side effects. Sometimes they are serious, most of the time they are not. You may need medical treatment if you get some of the side effects.

Ask your doctor or pharmacist to answer any questions you may have.

During the first few days of taking LACTOCUR, you may feel bloated as a result of increased wind and intestinal cramps. These effects are usually mild and disappear after a few days.

At high doses you may suffer diarrhoea. If this happens, reduce the dose and/or tell your doctor or pharmacist.

Tell your doctor or pharmacist if you notice any of the following and they worry you:

  • nausea
  • vomiting

These side effects are uncommon.

Very rarely, infants given LACTOCUR may develop dehydration.

Other side effects not listed above may occur in some patients. Tell your doctor or pharmacist if you notice anything that is making you feel unwell. Some of these side effects (for example, potassium levels in the blood) can only be found when your doctor orders blood tests.



Keep LACTOCUR in a cool place where the temperature stays below 25°C. Do not store LACTOCUR in the refrigerator or freezer.

Do not store LACTOCUR or any other medicine in the bathroom or near a sink.

Keep it where children cannot reach it. A locked cupboard at least one-and-a-half metres above the ground is a good place to store medicines.


If your doctor or pharmacist tells you to stop taking LACTOCUR or the liquid has passed the expiry date, ask your pharmacist what to do with any that is left over.


What it looks like

LACTOCUR is a clear to brownish yellow liquid.

LACTOCUR is available in 200 mL and 500 mL bottles.


Active ingredients:
Lactulose 10.0 g/15 mL oral liquid

Other ingredients:
1.5 g or less of galactose, 0.9 g or less of lactose, 0.7 g or less of epilactose, 0.3 g or less of tagatose and 0.1 g or less of fructose.


Sandoz Pty Ltd
Level 4, 100 Harris St
Pyrmont NSW 2009
Tel: 1800 634 500
® Registered Trademark

AUST R 109887

This leaflet was prepared in November 2010.

Published by MIMS November 2011