Chronic Constipation:
For chronic constipation, initial management should focus on lifestyle modifications such as a high-fiber diet (including vegetables, fruits, and salads), adequate fluid intake, and regular physical activity. Lactu should be used only when these measures fail to provide sufficient relief.
Disturbances of Intestinal Flora:
Lactu may be beneficial in restoring normal intestinal flora, particularly following prolonged antibiotic therapy.
Other Indications:
Elevated blood ammonia levels are associated with hepatopathy or portal-systemic encephalopathy
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Lactu is a hyperosmolar laxative used effectively for the management of constipation. It contains lactulose, a non-absorbable disaccharide that draws water into the bowel lumen, leading to stool softening and stimulation of bowel movements through increased intestinal distention.
Lactulose is a synthetic disaccharide that undergoes metabolism in the colon by saccharolytic bacteria, producing low-molecular-weight organic acids (mainly lactic acid). These acids reduce colonic pH and retain water via osmotic action, thereby enhancing peristaltic activity and promoting defecation.
Since lactulose is minimally absorbed, its systemic pharmacokinetics are not relevant to its therapeutic effect.
For Chronic Constipation:
For Intestinal Flora Disturbances:
For Hyperammonemia:
In Portal-Systemic Encephalopathy: 6–9 teaspoons hourly until rapid laxation occurs, then reduce the dose as needed to maintain the desired effect.
Mild flatulence, abdominal cramps, or discomfort may occur at the start of therapy, usually resolving with dose adjustment. Overdosage may cause diarrhea and electrolyte imbalance (mainly potassium loss) if misused.
No clinically significant drug interactions have been reported. However, excessive use may cause potassium depletion, potentially enhancing the effects of cardiac glycosides.
Hypersensitivity to lactulose, galactose, or lactose
Galactose-free diet
Gastro-cardiac symptom complex
Suspected intestinal obstruction
Lactulose is classified as FDA Pregnancy Category B, indicating no evidence of fetal risk in animal studies. It is considered safe for use during pregnancy and breastfeeding under medical supervision.
Use cautiously in patients with lactose intolerance.
High doses used for hepatic encephalopathy should be administered carefully in diabetic patients, as the solution may contain small amounts of absorbable sugars.
Store in a cool, dry place, protected from light and heat.
Keep out of the reach of children.
⚠️Disclaimer:
At ePharma, we’re committed to providing accurate and accessible health information. However, all content is intended for informational purposes only and should not replace medical advice from a qualified physician. Please consult your healthcare provider for personalized guidance. We aim to support, not substitute, the doctor-patient relationship.