Note: This document contains side effect information about polyethylene glycol 3350. Some dosage forms listed on this page may not apply to the brand name MiraLAX.

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

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:

Incidence not known

• Bloating
• blood in stool
• diarrhea
• nausea
• stomach cramps or pain
• vomiting

For Healthcare Professionals

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

Gastrointestinal

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]