Lactulose 10.0 g/15 mL Oral Liquid
Consumer Medicine Information
What is in this leaflet
This leaflet answers some common questions about DUPHALAC.
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.
What DUPHALAC is used for
DUPHALAC belongs to a group of medicines known as laxatives.
DUPHALAC 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.
DUPHALAC 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.
DUPHALAC can be used where a soft stool is considered of medical benefit (haemorrhoids,
Ask your doctor or pharmacist if you have any questions about why DUPHALAC has been
prescribed or recommended for you.
Your doctor or pharmacist may have prescribed or recommended DUPHALAC for another
There is no evidence that DUPHALAC is addictive.
Before you take DUPHALAC
When you must not take it
Do not take DUPHALAC if you:
Are allergic to lactulose, galactose, lactose or any other sugar.
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 DUPHALAC after the expiry date printed on the label or if the cap seal
If it has expired or is damaged, return it to your pharmacist for disposal.
If you are not sure whether you should start taking DUPHALAC, talk to your doctor
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
painful abdominal symptoms with no identifiable cause
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 DUPHALAC
DUPHALAC has no or minor influence on the ability to drive and use machines.
If you have not told your doctor or pharmacist about any of the above, tell them before
you start taking DUPHALAC.
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
How to take DUPHALAC
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
The usual starting dose for constipation in adults is 15 to 45 mL daily, and the maintenance
dose is 15 to 30 mL daily.
It may take 1-2 days for DUPHALAC to work fully.
DUPHALAC should be given to children and infants under medical supervision. The usual
Infants under 1 year:
Initial dose (first 3 days): 5 mL daily
Maintenance dose: 5 mL daily
Children 1-6 years:
Initial dose (first 3 days): 5 to 10 mL daily
Maintenance dose: 5 to 10 mL daily
Children 7-14 years:
Initial dose (first 3 days): 15 mL daily
Maintenance dose: 10 to 15 mL daily
As a general rule, patients with constipation should drink plenty of water and increase
the amount of fibre in their diet.
The usual dose is 30 to 45 mL three to four times daily.
How to take it
DUPHALAC 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.
Duphalac may be taken diluted or undiluted.
When to take it
DUPHALAC 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 DUPHALAC 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 DUPHALAC 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
If you take too much (overdose)
Immediately telephone your doctor or pharmacist or the Poisons Information Centre
(telephone 131126), or go to Accident and Emergency at your nearest hospital, if you
think that you or anyone else may have taken too much DUPHALAC. Do this even if there
are no signs of discomfort or poisoning.
Symptoms of an overdose are likely to be diarrhoea and abdominal cramps.
While you are taking DUPHALAC
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 DUPHALAC.
If you are about to be started on any new medicine, tell your doctor, dentist, pharmacist
or other healthcare professional that you are taking DUPHALAC.
If you need to have a colonoscopy or proctoscopy, tell your doctor that you are taking
Things you must not do
Do not take DUPHALAC 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 DUPHALAC.
DUPHALAC 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 DUPHALAC, 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:
These side effects are uncommon.
Very rarely, infants given DUPHALAC 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.
After using DUPHALAC
Keep DUPHALAC in a cool place where the temperature stays below 25°C. Do not store
DUPHALAC in the refrigerator or freezer.
Do not store DUPHALAC 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 DUPHALAC or the liquid has passed
the expiry date, ask your pharmacist what to do with any that is left over.
What it looks like
DUPHALAC is a clear to brownish yellow liquid.
DUPHALAC is available in 200 mL and 500 mL bottles.
Each 15 mL of Duphalac contains 10 g lactulose as the active ingredient, furthermore
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.
BGP Products Pty Ltd
299 Lane Cove Road
Macquarie Park NSW 2113
Telephone: 1800 314 527
® Registered Trademark
AUST R 13295
This leaflet was prepared on 12th July 2018