Lactulose Genericon (Lactulose)

Lactulose is an osmotic laxative used to treat conditions related to bowel motility and ammonia metabolism.

• Constipation: relieves constipation by increasing stool water content and promoting regular bowel movements.
• Hepatic encephalopathy: lowers blood ammonia levels, helping improve mental status in patients with liver disease.
• Prevention of hepatic encephalopathy after TIPS: assists in managing chronic hepatic encephalopathy in patients undergoing transjugular intrahepatic portosystemic shunt procedures.

• Lactulose is not absorbed systemically; it remains in the gastrointestinal tract where it is metabolized by colonic bacteria into short‑chain fatty acids. This process increases the osmotic pressure in the lumen, drawing water into the colon, softening stools, and acidifying the colonic contents, which converts ammonia (NH3) to ammonium (NH4+), thereby reducing ammonia absorption and facilitating bowel evacuation.

Lactulose may cause several adverse reactions, ranging from mild to serious.

Common Side Effects

• Abdominal bloating: sensation of fullness or swelling in the abdomen.
• Flatulence: increased intestinal gas production.
• Diarrhea: loose, watery stools occurring more frequently.
• Nausea: feeling of sickness or urge to vomit.
• Abdominal cramps: painful muscle contractions in the gut.
• Thirst: increased desire for fluids.

Serious or Rare Side Effects

• Severe electrolyte imbalance: significant changes in sodium, potassium, or calcium levels.
• Dehydration: excessive loss of body fluids.
• Allergic reaction: rash, itching, swelling, or difficulty breathing.
• Severe abdominal pain: intense, persistent pain requiring medical attention.

When using Lactulose, consider the following safety measures.

• Dose adjustment in renal impairment: monitor kidney function and adjust dosage as needed.
• Electrolyte monitoring: check serum electrolytes regularly, especially in long‑term use.
• Avoid in intestinal obstruction: contraindicated if there is a mechanical blockage of the bowel.
• Caution in diabetes: monitor blood glucose as Lactulose may affect glycemic control.
• Medical supervision in hepatic encephalopathy: use under physician guidance to assess efficacy and safety.
• Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Lactulose can interact with other medicines, requiring attention to avoid reduced efficacy or increased risk.

Major Interactions (Avoid)

• Concomitant use with other laxatives: may cause severe diarrhea and electrolyte loss.
• Antidiarrheal agents (e.g., loperamide): can diminish Lactulose's intended effect.
• Mineral oil: may interfere with Lactulose absorption and efficacy.

Moderate Interactions (Monitor Closely)

• Diuretics: increased risk of electrolyte disturbances.
• Insulin or oral hypoglycemics: potential alteration of glucose control.
• Warfarin: possible effect on INR, requiring closer coagulation monitoring.