Yes, Evict Syrup (lactulose) can be used to treat constipation, as it helps soften stools and makes them easier to pass. It is generally safe, but it should be given in the correct dose as advised by a doctor or as directed on the label. Make sure she is drinking enough fluids and has adequate fibre in her diet to help improve bowel movements. If constipation persists or there is abdominal pain or discomfort, it is best to consult a doctor for advice.