MiraLAX Side Effects Center

What Is MiraLAX?

MiraLAX (polyethylene glycol 3350) is used as a laxative to treat occasional constipation or irregular bowel movements. MiraLAX is available over-the-counter and in generic form.

What Are Side Effects of MiraLAX?

Common side effects of MiraLAX include:

• nausea,
• abdominal cramping,
• bloating,
• upset stomach,
• gas,
• dizziness, or
• increased sweating.

Tell your doctor if you experience serious side effects of MiraLAX including severe or bloody diarrhea, bleeding from your rectum, blood in your stools, or severe and worsening stomach pain, cramping, or bloating.

MiraLax may cause serious side effects including:

• severe or bloody diarrhea,
• rectal bleeding,
• blood in your stools, and
• severe or worsening stomach pain

Get medical help right away, if you have any of the symptoms listed above.

Seek medical care or call 911 at once if you have the following serious side effects:

• Serious eye symptoms such as sudden vision loss, blurred vision, tunnel vision, eye pain or swelling, or seeing halos around lights;
• Serious heart symptoms such as fast, irregular, or pounding heartbeats; fluttering in your chest; shortness of breath; and sudden dizziness, lightheartedness, or passing out;
• Severe headache, confusion, slurred speech, arm or leg weakness, trouble walking, loss of coordination, feeling unsteady, very stiff muscles, high fever, profuse sweating, or tremors.

This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.

Dosage for MiraLAX

The usual dose of MiraLAX is 17 grams (about 1 heaping tablespoon) of powder per day (or as directed by physician) in 4 to 8 ounces of water.

What Drugs, Substances, or Supplements Interact with MiraLAX?

Other drugs may interact with MiraLAX. Tell your doctor all prescription and over-the-counter medications and supplements you use.

MiraLAX During Pregnancy and Breastfeeding

During pregnancy, MiraLAX should be used only when prescribed. It is not known if this drug passes into breast milk. Consult your doctor before breast-feeding.

Additional Information

Our MiraLAX (polyethylene glycol 3350) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop taking this medicine and call your doctor at once if you have:

• severe or bloody diarrhea;
• rectal bleeding;
• blood in your stools; or
• severe and worsening stomach pain.

Common side effects may include:

• bloating, gas, upset stomach;
• dizziness; or
• increased sweating.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.