Duphalac 66.7 G/100ml Syrup 240mlProduct Overview Product Form: Syrup Pack Size: 240ml Prescription Required: No Duphalac 66. 7 G 100ml Syrup 240ml Duphalac 66. 7 G 100ml Syrup is a scientifically formulated laxative aimed at treating constipation and promoting a healthier digestive system. Its primary ingredient, Lactulose, is a synthetic sugar used to treat constipation and, sometimes, liver disease. It works by absorbing water into the colon, which softens stools and stimulates