Movicol Sachets Movicol Sachets are a laxative for the treatment of constipation in adults, adolescents & elderly. It is not recommended for children below 12 years of age. Movicol Sachets helps you to have a comfortable bowel movement even if you have been constipated for a long time. Movicol Sachets also works in very bad constipation called faecal impaction. Directions Constipation: A dose of Movicol is 1 sachet. Take this 1-3 times a day according to the severity of your constipation. Open the sachet & pour the contents into a glass. Add about 125ml or pint of water to the glass. Stir well until all the powder has dissolved & the Movicol solution is clear or slightly hazy, then drink it. If you are taking Movicol for faecal impaction it may be easier to dissolve 8 sachets in 1 litre of water.