MiraLAX Side Effects

Generic name: polyethylene glycol 3350

Medically reviewed by Drugs.com. Last updated on Nov 14, 2023.

Note: This document provides detailed information about MiraLAX.

Applies to polyethylene glycol 3350: oral packet, oral powder for solution Side Effects associated with polyethylene glycol 3350. Some dosage forms listed on this page may not apply specifically to the brand name MiraLAX.

Applies to polyethylene glycol 3350: oral packet, oral powder for solution.

Precautions

If your or your child's constipation do not improve within 7 days, or if they become worse, check with your doctor.

Serious side effects of MiraLAX

Along with its needed effects, polyethylene glycol 3350 (the active ingredient contained in MiraLAX) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking polyethylene glycol 3350:

For healthcare professionals

Applies to polyethylene glycol 3350: oral kit, oral powder for reconstitution.

Gastrointestinal adverse events

• Frequency not reported: Abdominal distension and pain, borborygmi, nausea, vomiting, diarrhea, bloating, flatulence, abdominal cramping, perianal inflammation and soreness^[Ref]

Hypersensitivity

• Frequency not reported: Allergic reaction^[Ref]

See also:

Frequently asked questions

• When is the best time to take MiraLAX?
• Metamucil vs. MiraLAX: How do they compare?
• Which drugs cause opioid-induced constipation?
• MiraLax - what is the dosage in teaspoons or tablespoons?

Further information

MiraLAX side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer