to treat chronic constipation

Brand Name: DUPHALAC

Form: Oral syrup

Strength: Usually 667 mg/mL (or as per local formulation)

Class: Osmotic laxative

Mechanism of Action:

• Lactulose is a non-digestible sugar.

• It draws water into the colon, softening stools and increasing bowel movement frequency.

• Also acidifies colonic contents, converting ammonia (NH₃) to ammonium (NH₄⁺), which reduces blood ammonia levels.