Lactulose Mip (Lactulose)

Lactulose is employed in gastrointestinal and hepatic conditions where reduction of intestinal ammonia or stool softening is required.

• Constipation: Relieves infrequent bowel movements by increasing stool water content.
• Hepatic encephalopathy: Lowers blood ammonia levels, helping to prevent or treat episodes of neuropsychiatric dysfunction.

• Lactulose is a synthetic disaccharide that is not absorbed in the small intestine. In the colon, bacterial enzymes hydrolyze it to lactic acid, acetic acid and other short‑chain fatty acids, which lower colonic pH. The acidic environment promotes conversion of ammonia (NH3) to ammonium (NH4+), trapping it in the lumen, and the osmotic effect draws water into the bowel, softening stools and accelerating transit.

Lactulose may cause a range of adverse reactions, most of which are mild and related to its osmotic activity.

Common Side Effects

• Flatulence: Increased intestinal gas production.
• Diarrhoea: Loose, watery stools.
• Abdominal cramping: Stomach discomfort or pain.
• Nausea: Feeling of sickness.
• Bloating: Sensation of abdominal fullness.

Serious or Rare Side Effects

• Electrolyte imbalance: Low potassium or sodium levels.
• Dehydration: Significant fluid loss leading to weakness.
• Severe abdominal pain: Persistent or worsening pain.
• Allergic reaction: Rash, itching, or swelling.
• Hypernatremia: Elevated blood sodium in rare cases.

When prescribing Lactulose, clinicians should consider several safety measures to minimize risks.

• Dose titration: Adjust the amount to achieve 2–3 soft stools per day.
• Fluid intake: Encourage adequate hydration to prevent dehydration.
• Renal impairment: Monitor kidney function as osmotic load may affect electrolyte balance.
• Diabetes: Use caution as Lactulose contains minimal fermentable sugars.
• Pediatric use: Dose must be individualized; 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, influencing their absorption or effect.

Major Interactions (Avoid)

• Antacids containing magnesium or aluminum: May reduce Lactulose efficacy by neutralizing acidity.
• Antibiotics (e.g., rifaximin): Concurrent use may alter gut flora and affect ammonia reduction.

Moderate Interactions (Monitor Closely)

• Diuretics: Increased risk of electrolyte disturbances.
• Insulin or oral hypoglycemics: Monitor blood glucose as Lactulose can affect carbohydrate metabolism.
• Mineral supplements (iron, calcium): May bind to Lactulose and diminish its action.