Children's Hospital Colorado

Polyethylene Glycol (Miralax)

Disclaimer: The below information is not intended as a substitute for professional medical advice. It is provided for educational and reference purposes only. You assume full responsibility for how you choose to use this information. Please call your primary care provider or our ParentSmartTM Healthline with any questions. Pediatric nurses are available 24/7 at 720-777-0123.

You can take polyethylene glycol (PEG) to help treat constipation on a short-term basis.

This type of medicine helps pull water into your intestines. This softens the stools.


  • Miralax Packet: Stir and dissolve one packet of powder (17 g) in a cup (8 oz; 240 ml) of or water or other preferred beverage (cold, hot or room temperature). Drink. Do not use more than once a day.

Extra Notes and Warnings:

  • This is an over-the-counter (OTC) drug. You can buy it at the drugstore.
  • Do not use for more than 1 week without talking to your doctor.

Other Names:

  • PEG

Common Brand Names:

  • Miralax

Read the instructions and warnings on the package insert for all medicines you take.