How Does Lactulose Solution Work? Lactulose Solution is suitable for pregnant women & nursing mothers, the elderly, children & those who have recently undergone surgery. The active ingredient Lactulose is a synthetic disaccharide, a sugar molecule of two smaller sugar molecules bonded together. The body cannot break it down or absorb it so the bacteria in the colon or large bowel work to break down the lactulose into acids. The acids 'pull' the water into the colon & soften the stool, making going to the toilet a lot more comfortable. How To Use Lactulose Solution Adults & the elderly; Three 5ml spoonfuls daily. Children aged 5 to 10 years; Two 5ml spoonfuls daily Children aged 1 to 5 years; One 5ml spoonful a day. Babies (less than a year old); 2.5ml spoonful twice a day. Do not exceed the recommended dose. Avoid prolonged use. If symptoms do not improve, seek medical advice.