Lactulose Al (Lactulose)

Lactulose Al acts on the gastrointestinal tract to modify stool consistency and on the colonic environment to lower ammonia levels.

• Constipation: softens stools and promotes regular bowel movements.
• Hepatic encephalopathy: reduces intestinal ammonia absorption, helping to improve mental status.
• Prevention of hepatic encephalopathy episodes: maintains low ammonia concentrations to lower recurrence risk.

• Lactulose is a synthetic disaccharide that is not absorbed in the small intestine. In the colon it is metabolized by bacteria into acidic compounds, increasing osmotic pressure and drawing water into the lumen, which softens stool. The resulting acidification converts ammonia (NH3) to ammonium (NH4+), limiting its absorption and thereby reducing systemic ammonia levels.

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

Common Side Effects

• Abdominal bloating: sensation of fullness or swelling in the abdomen.
• Flatulence: increased intestinal gas production.
• Diarrhea: loose, watery stools, especially at higher doses.
• Nausea: feeling of queasiness or urge to vomit.
• Abdominal cramps: intermittent painful contractions.

Serious or Rare Side Effects

• Severe electrolyte imbalance: notable changes in sodium, potassium, or magnesium levels.
• Dehydration: excessive fluid loss leading to low blood volume.
• Allergic reaction: rash, itching, swelling, or difficulty breathing.
• Hepatic decompensation: worsening liver function in susceptible individuals.

Before initiating Lactulose therapy, consider the following precautions.

• Renal function assessment: evaluate kidney status to monitor for electrolyte disturbances.
• Electrolyte monitoring: check serum electrolytes regularly during treatment.
• Diabetes caution: monitor blood glucose as diarrhea may affect glycemic control.
• Hepatic disease supervision: use under medical guidance in patients with liver impairment.
• Discontinuation guidance: taper or stop under physician direction to avoid abrupt changes.
• Store at ambient temperature: keep in the original container, protect from moisture and direct sunlight.

Lactulose can interact with other medicines, altering their effectiveness or safety.

Major Interactions (Avoid)

• Antacids containing magnesium: may increase the risk of diarrhea and electrolyte loss.
• Loop or thiazide diuretics: combined use can exacerbate dehydration and electrolyte imbalance.
• Insulin or oral hypoglycemics: rapid fluid loss may precipitate hypoglycemia.

Moderate Interactions (Monitor Closely)

• Probiotic supplements: may modify colonic bacterial metabolism, affecting lactulose efficacy.
• Oral rehydration solutions: concurrent use requires electrolyte monitoring.
• Lactose‑containing products: can add to gastrointestinal symptoms in sensitive individuals.