Macrogols belong to a group of medicines known as osmotic laxatives. They are substances which are used medically to relieve constipation or to clear the bowel before some clinical procedures. They are sometimes called polyethylene glycols. Macrogols are identified by a number which represents their molecular weight so, for example, the macrogol used to relieve constipation is called macrogol '3350'.
This is a companion discussion topic for the original article at https://patient.info/medicine/macrogols-for-constipation-or-bowel-cleansing-cosmocol-movicol-laxido