Lactolook Sugar Free Solution belongs to the group of medicines called laxatives used to treat constipation. Lactolook Sugar Free Solution is also used to treat hepatic encephalopathy. Constipation refers to infrequent bowel movements in which the stools are often dry, painful and hard to pass. Hepatic encephalopathy is a liver disease which causes the accumulation of toxic substances in the bloodstream which are normally removed by the liver.