This Movicol Liquid Solution is a treatment that is used to relieve the effects of constipation. This works thanks to the 4 active ingredients that are contained in the liquid, which are: - Potassium chloride - Sodium chloride - Sodium hydrogen carbonate - Macrogol 3350 3 of the active ingredients are electrolytes that help to restore ones lost as a result of constipation. The other ingredient, macrogol 3350, is a type of laxative that helps to move the bowel contents by increasing the amount of water, without the body absorbing it.