Lactulose Mip (Lactulose)

Lactulose acts as an osmotic agent to treat conditions related to bowel motility and ammonia accumulation.

• Constipation: softens stool and promotes regular bowel movements.
• Hepatic encephalopathy: reduces intestinal absorption of ammonia, helping to improve mental status in liver disease patients.

• Lactulose is a synthetic disaccharide that is not absorbed in the small intestine. In the colon it is metabolized by bacterial flora into short‑chain fatty acids, which increase the osmotic pressure within the lumen, drawing water into the bowel to soften feces. The acidic environment also converts ammonia to ammonium, limiting its absorption and lowering systemic ammonia levels.

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

Common Side Effects

• Bloating: sensation of abdominal fullness.
• Flatulence: increased intestinal gas.
• Abdominal cramps: mild to moderate cramping sensations.
• Diarrhea: loose stools, especially at higher doses.
• Nausea: feeling of sickness.

Serious or Rare Side Effects

• Severe electrolyte imbalance: especially low potassium.
• Dehydration: due to excessive fluid loss.
• Allergic reaction: rash, itching, or swelling.
• Severe abdominal pain: persistent or worsening pain.
• Hepatic encephalopathy worsening: rare paradoxical increase in ammonia.

Before initiating Lactulose, consider patient‑specific factors and monitor appropriately.

• Renal impairment: adjust dose and monitor renal function.
• Electrolyte monitoring: check potassium and sodium levels during therapy.
• Intestinal obstruction: avoid use if mechanical blockage is present.
• Diabetes mellitus: lactulose contains sugars; monitor blood glucose.
• Abrupt discontinuation: taper to prevent rebound constipation.
• Store below 25°C: keep in the original container, protect from moisture and direct sunlight.

Lactulose can influence the absorption or effect of other medicines; some combinations require caution.

Major Interactions (Avoid)

• Antibiotics that alter gut flora (e.g., neomycin): may reduce lactulose efficacy.
• Mineral oil: can interfere with lactulose’s osmotic action.

Moderate Interactions (Monitor Closely)

• Antidiabetic agents: lactulose may affect glucose control; monitor blood sugar.
• Oral potassium supplements: risk of hyperkalemia; monitor serum potassium.
• Proton pump inhibitors: may alter gastric pH and affect lactulose metabolism.