Lactulose Arrow (Lactulose)

• Lactulose acts as an osmotic laxative and ammonia‑lowering agent in gastrointestinal and hepatic conditions.
• Constipation: softens stools and promotes bowel movements.
• Hepatic encephalopathy: lowers blood ammonia levels to improve neurological function.
• Hyperammonemia in liver disease: helps reduce elevated ammonia concentrations.

• Lactulose is a synthetic disaccharide that is not absorbed in the small intestine. In the colon it is metabolized by bacteria into lactic acid and acetic acid, lowering colonic pH. The resulting acidification converts ammonia (NH3) to ammonium (NH4+), which is trapped and excreted. The increased osmotic load draws water into the lumen, softening stool and stimulating peristalsis.

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 discomfort.
• Diarrhea: loose stools, especially at higher doses.
• Nausea: feeling of sickness.
• Taste disturbance: sweet or fermented taste.

Serious or Rare Side Effects

• Severe dehydration: excessive fluid loss requiring medical attention.
• Electrolyte imbalance: abnormal sodium or potassium levels.
• Allergic reaction: rash, itching, swelling, or difficulty breathing.
• Severe abdominal pain: persistent or worsening pain.
• Rectal bleeding: blood in stool indicating mucosal injury.

Before initiating Lactulose therapy, consider the following precautions.

• Renal function assessment: evaluate kidney status to avoid accumulation.
• Electrolyte monitoring: check sodium and potassium levels during treatment.
• Diabetes caution: monitor blood glucose as lactulose contains carbohydrates.
• Intestinal obstruction: avoid use in patients with known blockage.
• Hepatic impairment: adjust dose based on liver function.
• Store at ambient temperature: keep in the original pack, protect from moisture.

Lactulose can interact with other medications, affecting its efficacy or safety.

Major Interactions (Avoid)

• Antidiarrheal agents (e.g., loperamide): may reduce Lactulose's laxative effect.
• High‑dose mineral supplements (e.g., magnesium): can increase osmotic load and cause severe diarrhea.
• Oral antibiotics: may alter gut flora, affecting Lactulose metabolism.

Moderate Interactions (Monitor Closely)

• Diabetic medications: monitor glucose as Lactulose may affect carbohydrate balance.
• Proton pump inhibitors: may influence gastric pH and bacterial activity.
• Other laxatives: combined use may lead to excessive fluid loss.