macrogol

Macrogol is the international nonproprietary name used for polyethylene glycol (PEG) as a medication ingredient. It is usually followed by a number indicating the average molecular weight, indicating the length of the polymer of the specific molecule in use. Macrogol is used as a laxative to treat constipation in children and adults. It is taken by mouth. Benefits usually occur within three days. It is also used as an excipient. It is also used to clear the bowels before a colonoscopy, when the onset of the laxative effect is more rapid, typically within an hour.

Side effects may include increased bowel gas, abdominal pain, and nausea. Rare but serious side effects may include an abnormal heartbeat, seizures, and kidney problems. Use appears to be safe during pregnancy. It is classified as an osmotic laxative: It works by increasing the amount of water in the stool.