Duphalac is a 300ml oral solution containing lactulose (667 g/l). This medicinal syrup is commonly used as a laxative treatment to help relieve constipation and regulate bowel movements. Duphalac comes in a white plastic bottle with a measuring cap for accurate dosing. The syrup contains lactulose as its active ingredient in a concentration of 667 g/l. As this is a medicinal product, it should only be used under proper medical supervision and according to prescribed dosage instructions.