Lactulose Stada (Lactulose)

Lactulose is an osmotic laxative used to manage conditions related to bowel motility and hepatic ammonia accumulation.

• Constipation: Relieves infrequent or difficult bowel movements by increasing water content in the colon.
• Chronic constipation: Provides long‑term bowel regularity for patients requiring ongoing laxative therapy.
• Hepatic encephalopathy: Lowers blood ammonia levels, helping to improve neurological symptoms in patients with liver disease.
• Prevention of recurrent hepatic encephalopathy: Helps maintain low ammonia concentrations to reduce the risk of episodic neurocognitive decline.

• Lactulose is a synthetic disaccharide that is not absorbed in the small intestine. In the colon, bacterial enzymes hydrolyze it to short‑chain fatty acids, which lower colonic pH and create an osmotic gradient that draws water into the lumen, stimulating peristalsis. The acidic environment also converts ammonia (NH3) to ammonium (NH4+), reducing its absorption into the bloodstream.

Lactulose may cause a range of gastrointestinal and metabolic reactions, most of which are mild and transient.

Common Side Effects

• Flatulence: Increased gas production due to bacterial fermentation.
• Diarrhea: Loose stools from osmotic water influx.
• Abdominal cramping: Stomach discomfort associated with increased motility.
• Nausea: Mild queasiness after ingestion.

Serious or Rare Side Effects

• Electrolyte imbalance: Significant loss of potassium or sodium with prolonged diarrhea.
• Severe dehydration: Marked fluid loss requiring medical attention.
• Acute colonic pseudo‑obstruction: Rare obstruction‑like syndrome.
• Hyperosmolar coma: Extremely rare, associated with massive overdose.

When prescribing lactulose, clinicians should consider several precautionary measures to ensure safe use.

• Dose titration: Adjust the amount to achieve two soft stools per day, avoiding overt diarrhea.
• Renal impairment: Monitor kidney function, as dehydration can exacerbate renal insufficiency.
• Diabetes mellitus: Observe blood glucose, although lactulose has minimal impact on glucose levels.
• Pediatric use: Use only under specialist supervision, with age‑appropriate dosing.
• Pregnancy and lactation: Evaluate risk‑benefit, as safety data are limited.
• Store at ambient temperature: Keep below 25 °C in the original container, protected from moisture and direct sunlight.

Lactulose can interact with other medicines, affecting their absorption or therapeutic effect.

Major Interactions (Avoid)

• Antacids containing magnesium or aluminum: May reduce lactulose efficacy by altering colonic pH.
• Oral antibiotics: Broad‑spectrum agents can diminish bacterial fermentation of lactulose, decreasing its laxative effect.

Moderate Interactions (Monitor Closely)

• Diuretics: Increased risk of electrolyte disturbances when combined with lactulose‑induced diarrhea.
• Insulin or oral hypoglycemics: Monitor blood glucose as changes in fluid balance may affect glucose control.
• Proton pump inhibitors: May modestly affect colonic flora and lactulose metabolism.