Polyethylene Glycol in medicine is used to treat the infrequent constipation. It is one of the important osmotic laxatives that offers ease in the bowel movements. This is an osmotic-type laxative, which sometimes can be taken without a prescription. It is apt for self-treatment. If you are easily allergic to the medicines, do consult the doctor. Polyethylene Glycol is widely used in the chemical industry for several chemical processing and applications.