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Lactulose: uses, side effects & brands
Lactulose is a gentle laxative for constipation and to lower ammonia in liver disease. It belongs to the Acidity, antacid & gut medicine group. These treat acidity, indigestion, ulcers, spasm and bowel problems.
Drug type — dosing is set by your doctor
| Measure | Range |
|---|---|
| Drug class | Acidity, antacid & gut medicine |
| Type | Prescription |
| Dose | Individual — ask your doctor or pharmacist |
What it is used for
- Constipation
- Hepatic encephalopathy (confusion in severe liver disease)
- Softening stools after surgery or in piles
Common brand names
- India: Duphalac, Looz, Livoluk
- Worldwide: Duphalac, Kristalose
Common side effects
- Wind and bloating
- Tummy cramps
- Diarrhoea if too much is taken
Before taking it — precautions
- Tell your doctor about diabetes (contains sugars) or galactose intolerance
- It may take a couple of days to work
- Drink plenty of fluids
When to see a doctor urgently
- Severe diarrhoea or dehydration
- Severe abdominal pain or vomiting
- Confusion worsening in liver disease (urgent)
Not a prescription — no dose shown. The right dose of lactulose depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.
Frequently asked questions
How does lactulose work?
It draws water into the bowel, softening stools and making them easier to pass.
Why is it used in liver disease?
It lowers ammonia levels, which helps prevent confusion caused by liver failure.
Can children take it?
Yes, it is often used in children; your doctor will set the amount.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.