About lactulose
Osmotic laxative
Used for
- Treats constipation
- Helps prevent or treat hepatic encephalopathy
Usual adult dose
Constipation: usually 15–30 mL once daily. Hepatic encephalopathy: 30–45 mL three or four times daily, adjusted to produce 2–3 soft stools daily.
Usual dose in children
Constipation: under 1 year, up to 5 mL daily; ages 1–6, 5–10 mL daily; ages 7–14, 10–15 mL daily. Doses vary by product guidance.
Common side effects
- Gas and bloating
- Abdominal cramps
- Diarrhea
- Nausea
Important warnings
- Excessive use can cause dehydration or electrolyte disturbances.
- Avoid with bowel obstruction or galactosemia.
- Seek assessment for severe abdominal pain, vomiting, or unexplained bowel changes.
- People with diabetes should consider sugar content, especially with high doses.
Pregnancy
Generally considered suitable during pregnancy because absorption is minimal; consult a healthcare professional if needed.
Breastfeeding
Generally considered suitable during breastfeeding because absorption is minimal.
Interactions
- Other laxatives may increase diarrhea or dehydration.
- Medicines that lower potassium, such as some diuretics, may increase electrolyte risks.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.