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Abbott India Limited - Sachet - 6 G
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Lactulose (2.5gm/5ml)
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Duphalac Fiber is used for constipation Treatment of Hepatic encephalopathy.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026
Duphalac Fiber contains Lactulose (2.5gm/5ml). It belongs to the Laxative class of medicines.
Constipation Treatment of Hepatic encephalopathy
Duphalac Fiber Oral Solution works by drawing water into the intestine through osmosis, which makes the stool soft and easier to pass.
Take this medicine in the dose and duration as advised by your doctor. Check the label for directions before use. Measure it with a measuring cup and take it by mouth. Shake well before use. Duphalac Fiber Oral Solution may be taken with or without food.
Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.
If you miss a dose of Duphalac Fiber Oral Solution, skip it and continue with your normal schedule. Do not double the dose.\n
An overdose of this medicine can cause severe loose motions, dehydration and salt imbalance. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.
Most side effects of Duphalac Fiber are mild and settle as the body adjusts. Reported side effects include:
Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.
| Pregnancy | Pregnancy SAFE IF PRESCRIBED |
|---|---|
| Breastfeeding | Breast feeding SAFE IF PRESCRIBED |
| Alcohol | Alcohol CONSULT YOUR DOCTOR |
| Driving | Driving SAFE |
| Kidney | Kidney SAFE IF PRESCRIBED |
| Liver | Liver SAFE IF PRESCRIBED |
| Habit forming | No |
Drink plenty of water while taking any laxative, particularly the fibre-based ones — without it they can make constipation worse. Do not use stimulant laxatives daily over long periods without medical advice; the bowel becomes reliant on them. See a doctor if constipation is new and persistent in an adult over forty, or comes with blood, weight loss or severe pain.
Not for anyone with a known allergy to this medicine or to any ingredient in the pack. Not for anyone with a suspected bowel obstruction, or with severe abdominal pain of unknown cause.
Laxatives can reduce the absorption of other medicines taken at the same time.
Store below 30°C in the original pack, away from direct sunlight and moisture. Keep out of the reach of children.
Duphalac Fiber Oral Solution should preferably be taken at bedtime, as it requires 6 to 8 hours to show its effect. It is usually taken once a day as needed for up to 2 weeks. Take it exactly as prescribed by your doctor. Inform your doctor if you have a history of stomach disorders such as appendicitis or a bowel obstruction. Eat a fiber-rich diet (20–35 g/day) and drink 8–10 glasses of water daily to keep stools soft and regular. Exercise regularly (at least 3 times a week) to support healthy bowel movements. Do not delay bowel movements, as holding stool can worsen constipation. Do not take this medicine for several months unless specifically advised by your doctor, especially for chronic conditions. If you are using this medicine for a liver-related condition, your doctor may ask you to monitor and record the number of bowel movements per day.

Abbott India Limited - Sachet - 6 G
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The information on Duphalac Fiber is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.