Zerrilose Lactulose 3.35g/5ml Syrup is an osmotic laxative designed to treat constipation. It contains 3.35g of lactulose per 5ml dose, which works by drawing water into the bowel, softening stools, and promoting regular bowel movements. The orange flavor makes it easier to take, and the 120ml bottle provides an effective solution for managing constipation, suitable for both short-term and long-term use.