Duphalac Oral Solution - Lactulose (3.335gm/5ml) medicine

Duphalac Oral Solution: Complete Guide to Uses, Dosage, and Safety

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🏭 Abbott 📦 Varies by brand 💊 Allopathy 📅 Updated: Sep 24, 2026
⚠️ Hepatotoxicity Risk 📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established for constipation and hepatic encephalopathy.
Reviewed by
SaathiMed Expert Panel | Sep 24, 2026

When to Call Your Doctor IMMEDIATELY

  • Severe abdominal pain or cramping
  • Blood in stool or vomit
  • Signs of dehydration (dry mouth, decreased urination, dizziness)
  • Severe diarrhea that does not stop
  • Confusion or changes in mental status (in patients with liver disease)
  • Allergic reactions such as rash, itching, or swelling
  • Irregular heartbeat or muscle weakness

If experiencing severe symptoms, call emergency services immediately.

What is Duphalac Oral Solution used for?

This medicine is an oral solution of lactulose used to treat constipation and hepatic encephalopathy. It works by drawing water into the intestines and reducing ammonia absorption. It is generally safe but may cause bloating and gas initially.

  • Generic Name: Lactulose (3.335gm/5ml)
  • Manufacturer: Abbott
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 Duphalac Oral Solution के बारे में (Hindi Summary)

उपयोग: यह दवा लैक्टुलोज़ का मौखिक घोल है, जिसका उपयोग कब्ज और यकृत रोग से जुड़े मस्तिष्क विकार (हेपेटिक एन्सेफैलोपैथी) के इलाज के लिए किया जाता है। यह आंतों में पानी खींचकर मल को नरम करती है और अमोनिया के अवशोषण को कम करती है। यह दवा आमतौर पर सुरक्षित है, लेकिन शुरुआत में पेट फूलना और गैस की समस्या हो सकती है।

साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में पेट फूलना, गैस, पेट में ऐंठन और जी मिचलाना शामिल हैं। ये आमतौर पर कुछ दिनों में ठीक हो जाते हैं। अगर दस्त लगातार हो रहे हों या निर्जलीकरण के लक्षण दिखें, तो तुरंत डॉक्टर से संपर्क करें।

सुरक्षा सलाह: इस दवा को लेने से पहले अपने डॉक्टर को बताएं यदि आपको मधुमेह, गैलेक्टोसीमिया या आंतों में रुकावट है। पर्याप्त पानी पिएं। बिना डॉक्टर की सलाह के दो हफ्ते से ज्यादा इसका इस्तेमाल न करें। गंभीर पेट दर्द, उल्टी या दस्त होने पर दवा बंद करें और डॉक्टर से मिलें।

💡 Did You Know? India has the highest number of USFDA-compliant plants outside the USA.

💊 Duphalac Oral Solution Uses & Benefits

[{"condition":"Constipation","description":"This medicine is used to treat occasional and chronic constipation by softening the stool and promoting bowel movements.","evidence":"Well-established"},{"condition":"Hepatic encephalopathy","description":"This medicine helps reduce blood ammonia levels in patients with liver disease, improving mental status and preventing episodes of confusion.","evidence":"Well-established"},{"condition":"Portosystemic encephalopathy","description":"Used to manage and prevent episodes of brain dysfunction due to liver disease by lowering ammonia production in the gut.","evidence":"Well-established"}]

Off-label uses: [{"condition":"Small intestinal bacterial overgrowth (SIBO)","description":"Sometimes used off-label as a substrate in breath tests for diagnosing SIBO, but not as a treatment.","evidence":"Limited"},{"condition":"Chronic kidney disease","description":"Occasionally used off-label to reduce nitrogenous waste in patients with kidney failure, but evidence is limited.","evidence":"Limited"}]

Primary treatment for: Constipation

Also treats: Hepatic encephalopathy, Portosystemic encephalopathy

📋 Drug Information

Generic Name(s)Lactulose (3.335gm/5ml)
Brand NameDuphalac Oral Solution
ManufacturerAbbott
Packaging / FormVaries by brand (Allopathy)
Therapeutic Class
Action Class
Route of AdministrationOral
StorageStore at room temperature (15-30°C). Do not refrigerate. Keep the bottle tightly closed. Protect from direct sunlight and moisture.
Shelf Life24 months from the date of manufacture.
WHO GuidelineNot established from the available information.
ICMR GuidelineNot established from the available information.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Take this medicine at the same time each day to establish a routine.
2
Start with a lower dose and increase gradually to minimize bloating and gas.
3
Drink plenty of water throughout the day to help the medicine work better.
4
If you have diabetes, monitor your blood sugar levels regularly as this medicine contains sugars.
5
Do not take other laxatives without consulting your doctor.
6
For hepatic encephalopathy, the dose is adjusted to achieve 2-3 soft stools per day.
7
If you experience severe diarrhea, stop the medicine and consult your doctor.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

Constipation
This medicine is commonly prescribed for this.
Likely Use
Confusion due to liver disease
This medicine is used for hepatic encephalopathy.
Likely Use
Fever
This medicine is not a fever reducer.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionThis medicine is minimally absorbed from the gastrointestinal tract. Only about 0.4% to 2% of an oral dose is absorbed unchanged. The majority reaches the colon where it exerts its effects.
DistributionAbsorbed lactulose is distributed mainly in the extracellular fluid. It does not bind to plasma proteins and has a low volume of distribution. It does not cross the blood-brain barrier to any significant extent.
Protein BindingNot established from the available information.
MetabolismLactulose is not metabolized by human enzymes. It is metabolized by colonic bacteria into lactic acid, acetic acid, and other short-chain fatty acids.
Half-LifeNot established from the available information.
ExcretionAbsorbed lactulose is excreted unchanged in the urine. Unabsorbed lactulose and its metabolites are excreted in the feces.
BioavailabilityThe oral bioavailability of lactulose is very low, approximately 0.4% to 2%.
Onset of ActionThe laxative effect of this medicine typically occurs within 24 to 48 hours after oral administration. For hepatic encephalopathy, the effect on ammonia levels may take 24 to 48 hours as well.
Peak Plasma TimeNot established from the available information.
Duration of ActionThe laxative effect of this medicine lasts until the lactulose is completely evacuated from the colon, usually within 24 to 48 hours after a dose. For ammonia reduction, the effect persists as long as the medicine is taken regularly.

How It Works

This medicine works by two main mechanisms. First, as an osmotic laxative, lactulose is not absorbed in the small intestine and draws water into the colon, which softens the stool and stimulates bowel movements. Second, in the colon, bacteria metabolize lactulose into lactic acid and acetic acid, which lowers the pH. This acidic environment converts ammonia (NH3) to ammonium (NH4+), which is less absorbable, thereby reducing blood ammonia levels. This dual action makes it useful for both constipation and hepatic encephalopathy.

Mechanism Steps

1
Ingestion and passage through the GI tract: This medicine is taken orally and passes through the stomach and small intestine largely unchanged because human digestive enzymes cannot break down lactulose.
2
Osmotic effect in the colon: In the colon, lactulose draws water into the stool, increasing stool volume and softening it, which stimulates peristalsis and promotes bowel movements.
3
Bacterial fermentation: Colonic bacteria ferment lactulose into short-chain fatty acids, primarily lactic acid and acetic acid, which lower the colonic pH.
4
Ammonia trapping: The acidic environment converts ammonia to ammonium ions, which are less readily absorbed into the bloodstream, thereby reducing blood ammonia levels.
5
Prebiotic effect: Lactulose promotes the growth of beneficial bacteria such as Lactobacillus and Bifidobacterium, which can improve gut flora balance.

💡 How to Take Duphalac Oral Solution

Strength: Oral solution: 3.335 g of lactulose per 5 mL.

1Shake the bottle well before each use.
2Measure the prescribed dose using the provided measuring cup or spoon.
3Take this medicine orally, with or without food.
4You may mix it with water, fruit juice, or milk to improve taste.
5Drink a full glass of water after taking the dose.
6Take at the same time each day for best results.
7Wash the measuring cup after each use.

Dosage Information

Adult DosageFor constipation, the usual adult dose is 15-30 mL (10-20 g) once daily, preferably at the same time each day. For hepatic encephalopathy, the dose is typically 30-45 mL (20-30 g) three to four times daily, adjusted to produce 2-3 soft stools per day. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function.
Pediatric DosagePediatric dosing is not established from available information. Consult a pediatrician.
Elderly DosageElderly patients may be more sensitive to the effects of this medicine. Start with a lower dose and monitor for dehydration and electrolyte imbalance. Dose must be individualized by a qualified clinician.
Renal ImpairmentUse with caution in patients with renal impairment. Monitor electrolytes and hydration status. Dose adjustment may be necessary. Consult a doctor.
Hepatic ImpairmentNo specific dose adjustment is required for hepatic impairment. However, in patients with hepatic encephalopathy, the dose is titrated to achieve 2-3 soft stools per day. Monitor ammonia levels and mental status.
Maximum Daily DoseFor constipation, the maximum recommended daily dose is 60 mL (40 g). For hepatic encephalopathy, doses up to 120 mL (80 g) daily may be used under medical supervision. Do not exceed the prescribed dose.

Dosage Timeline

🌅 Morning ❌ ☀️ Afternoon ❌ 🌆 Evening ❌ 🌙 Night ❌

🍽️ Food Timing Guide

With food
May take with or without food
Food does not significantly affect absorption.
Water
Drink plenty of water
Helps the medicine work and prevents dehydration.

⏰ What to Do If You Miss a Dose

📌 Less than half the dosing interval has passed
→ Take the missed dose as soon as you remember.
💡 Continue with the regular schedule.
📌 More than half the dosing interval has passed
→ Skip the missed dose.
💡 Do not double dose to catch up.

⚠️ Side Effects of Duphalac Oral Solution

✅ Common Side Effects

Flatulence (Common (10-20%))
Usually resolves after a few days. If persistent, consult your doctor.
Abdominal bloating (Common (10-20%))
Take with plenty of water and avoid carbonated drinks. Consult doctor if severe.
Abdominal cramps (Common (5-10%))
Reduce dose temporarily or take with food. If cramps persist, contact your doctor.
Nausea (Common (5-10%))
Take with food or after meals. If nausea continues, consult your doctor.
Diarrhea (Uncommon (1-5%))
Reduce dose or stop temporarily. Ensure adequate fluid intake. Consult doctor if diarrhea persists.

🚨 Serious Side Effects

Severe dehydration (Rare (<0.1%))
Seek immediate medical attention if you experience excessive thirst, dry mouth, decreased urination, or dizziness.
Electrolyte imbalance (Rare (<0.1%))
Report muscle weakness, irregular heartbeat, or confusion to your doctor immediately.
Allergic reaction (Rare (<0.1%))
Seek emergency care if you develop rash, itching, swelling of face, lips, or throat, or difficulty breathing.

⚠️ Rare Side Effects

Pneumatosis intestinalis
Seek immediate medical attention if you experience severe abdominal pain, bloating, or blood in stool.
Hypernatremia
Report increased thirst, confusion, or seizures to your doctor immediately.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Other laxatives Major
Antacids Moderate
Diuretics Moderate
Corticosteroids Moderate
Antidiabetic drugs Minor

🚨 Major Interactions

  • Other laxatives (e.g., stimulant laxatives)
  • Antacids (e.g., aluminum hydroxide, magnesium hydroxide)

⚡ Moderate Interactions

  • Diuretics (e.g., furosemide)
  • Corticosteroids

🍷 Alcohol Interaction

Alcohol may worsen dehydration and electrolyte imbalance caused by this medicine. It is advisable to avoid or limit alcohol consumption while taking this medicine, especially if you have liver disease.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Galactosemia (inability to metabolize galactose).","Intestinal obstruction or perforation.","Severe inflammatory bowel disease (e.g., ulcerative colitis, Crohn's disease) during acute flares.","Allergy to lactulose or any component of the formulation.","Low-sugar diet (e.g., in patients with rare hereditary problems of fructose intolerance)."]

⚠️ Warnings & Precautions

["Use with caution in patients with diabetes mellitus; lactulose contains galactose and lactose, which may affect blood sugar.","Do not use for more than 2 weeks without medical advice unless prescribed for a chronic condition.","Elderly patients and those with renal impairment are at higher risk of electrolyte imbalance.","Avoid concurrent use with other laxatives unless directed by a doctor.","If severe diarrhea occurs, stop the medicine and consult a doctor.","This medicine may cause bloating and gas initially; these effects usually subside.","Patients with hepatic encephalopathy should be monitored for mental status changes."]

🤱 Lactation Safety

Lactulose is minimally absorbed into the bloodstream and is unlikely to pass into breast milk in significant amounts. It is considered safe for use during breastfeeding. Consult your doctor for guidance.

💊 Overdose Management

Overdose of this medicine may cause severe diarrhea, dehydration, and electrolyte imbalance. Treatment is symptomatic and supportive. Stop the medicine and seek immediate medical attention. If ingestion is recent, activated charcoal may be considered, but lactulose is not well adsorbed by charcoal. Monitor electrolytes and hydration status closely.

⏰ Missed Dose

If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not double the dose to catch up.

Additional Safety Advice

General Safety

Before taking this medicine, inform your doctor if you have diabetes, galactosemia, or any bowel obstruction. Do not use this medicine for more than two weeks without medical advice unless prescribed for a chronic condition. Maintain adequate fluid intake to prevent dehydration. If you experience severe abdominal pain, vomiting, or diarrhea, stop the medicine and seek medical attention. This medicine may affect blood sugar levels in diabetics; monitor your glucose regularly. Avoid taking other laxatives without consulting your doctor. Keep this medicine out of reach of children. Do not exceed the recommended dose. If you are pregnant or breastfeeding, consult your doctor before use.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients are more susceptible to dehydration and electrolyte imbalances from this medicine. Start with a lower dose and monitor closely. Ensure adequate fluid intake.

🤰 Pregnancy Planning (TTC)

This medicine is considered safe for use during pregnancy. If you are planning to become pregnant, consult your doctor to ensure it is appropriate for your condition.

🏥 Post-Surgery Considerations

After surgery, this medicine may be used to prevent constipation caused by pain medications or immobility. Consult your surgeon before use.

🦷 Dental Procedures

No specific precautions needed for dental procedures. However, inform your dentist about all medications you are taking.

💚 Lifestyle Tips for Better Results

🏃
Eat a high-fiber diet rich in fruits, vegetables, and whole grains.
🥗
Drink at least 8-10 glasses of water daily.
😴
Exercise regularly to promote bowel movements.
💧
Establish a regular bathroom routine.
🧘
Avoid delaying the urge to have a bowel movement.
🌞
Manage stress through relaxation techniques.

🏋️ Exercise Considerations

No specific exercise restrictions while taking this medicine. However, if you experience dizziness or weakness due to dehydration, avoid strenuous exercise until you feel better.

🥗 Diet Recommendations

Include plenty of fiber-rich foods like oats, beans, and prunes.
Stay well hydrated with water and clear fluids.
Limit processed foods and refined sugars.
Avoid excessive caffeine and alcohol.

💼 Impact on Daily Work & Life

This medicine generally does not affect your ability to work or drive. However, if you experience dizziness or frequent bowel movements, you may need to adjust your schedule. It is advisable to take it at a time when you can access a bathroom.

🛑 When to Stop This Medicine

Do not stop taking this medicine without consulting your doctor, especially if you are taking it for hepatic encephalopathy. For constipation, if you have been using it for more than 2 weeks, consult your doctor before stopping. If you experience severe side effects, stop and seek medical advice.

📅 Long-Term Use Effects

Long-term use of this medicine is generally safe when taken as prescribed. However, prolonged use may lead to electrolyte imbalances, especially in elderly patients or those with kidney disease. It is important to have regular check-ups to monitor electrolytes and hydration status. For constipation, lifestyle changes such as a high-fiber diet and adequate fluid intake are recommended to reduce reliance on laxatives.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Dietary fiber supplementation

Increasing fiber intake can help relieve constipation naturally.

Evidence: Well-established
Probiotics

Certain probiotic strains may improve gut health and regularity.

Evidence: Moderate
Biofeedback therapy

For chronic constipation due to pelvic floor dysfunction.

Evidence: Well-established

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

No known interactions between this medicine and vaccines. Continue with your regular vaccination schedule.

📦 Storage Guide

✅ DO

Store at room temperature (15-30°C)

❌ DON'T

Do not refrigerate unless specified

✅ DO

Keep in original container

❌ DON'T

Do not transfer to unmarked containers

✅ DO

Keep away from direct sunlight

❌ DON'T

Do not store in bathroom cabinet

✈️ Traveling with This Medicine

When traveling, carry this medicine in its original packaging with the prescription label. Bring a copy of your prescription in case of customs checks. Store at room temperature and protect from extreme heat or cold. If crossing time zones, continue taking your doses at the same intervals as prescribed. Keep the bottle upright to prevent leakage.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 50-year-old man with chronic constipation
He had been struggling with hard stools and straining for years. His doctor prescribed this medicine. After a week, his bowel movements became regular and comfortable. He learned to take it with plenty of water and to be patient as it took a couple of days to work.
💡 Lesson: This medicine is effective for chronic constipation but requires consistent use and adequate hydration.
👤 A 65-year-old woman with liver cirrhosis and episodes of confusion
She was started on this medicine to lower her blood ammonia levels. Her family noticed a significant improvement in her alertness and memory within a few days. The dose was adjusted to ensure she had 2-3 soft stools daily.
💡 Lesson: This medicine can greatly improve mental function in hepatic encephalopathy when dosed correctly.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: This medicine usually takes 24 to 48 hours to produce a bowel movement. For hepatic encephalopathy, it may take a few days to see improvement in mental status.

Q: Can I take this medicine every day?

A: Yes, for chronic constipation or hepatic encephalopathy, it may be taken daily as prescribed. Do not use for more than 2 weeks without medical advice for constipation.

Q: What are the side effects?

A: Common side effects include bloating, gas, and abdominal cramps. These usually go away after a few days. Serious side effects are rare.

Q: Is this medicine safe during pregnancy?

A: This medicine is considered safe during pregnancy when taken as directed. Consult your doctor before use.

Q: Can I take this medicine with other laxatives?

A: It is best to avoid taking other laxatives with this medicine unless your doctor advises otherwise, as it may cause severe diarrhea.

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

  • Can I take this medicine long-term?
  • Will it affect my kidney function?
  • Can I drive after taking this medicine?
  • Does it interact with my blood pressure medicine?
  • What if I miss a dose?
  • Can I drink alcohol while taking this?

🔄 Substitutes for Duphalac Oral Solution

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: This medicine is a stimulant laxative and can be habit-forming.
    Fact: This medicine is an osmotic laxative and is not habit-forming. It works by drawing water into the colon.
  • Myth: This medicine is only for old people.
    Fact: This medicine can be used by adults and children for constipation and by patients with liver disease.
  • Myth: You can stop this medicine as soon as you feel better.
    Fact: For chronic conditions, this medicine should be taken as prescribed. Stopping abruptly may cause constipation to return.

🔄 Alternative Options

Generic Alternatives

  • Lactulose solution

Brand Alternatives

  • Duphalac
  • Lactulose Solution

📊 Comparison with Similar Medicines

[{"medicine":"Lactulose","class":"Osmotic laxative","primary_use":"Constipation, hepatic encephalopathy","onset":"24-48 hours","side_effects":"Bloating, gas, cramps"},{"medicine":"Polyethylene glycol","class":"Osmotic laxative","primary_use":"Constipation","onset":"24-48 hours","side_effects":"Bloating, nausea"},{"medicine":"Sorbitol","class":"Osmotic laxative","primary_use":"Constipation","onset":"24-48 hours","side_effects":"Bloating, gas"}]

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