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MiraLAX Side Effects

Most people are able to take MiraLAX without any problems. However, side effects can occur during treatment. Some of the most common reactions may include nausea, diarrhea, and cramping. If problems occur, they are often mild and easily treated; however, you should contact your healthcare provider if you develop rectal bleeding, excessive cramping, or other potentially serious problems.

An Introduction to MiraLAX Side Effects

Just like any medicine, MiraLAX® (polyethylene glycol 3350) can cause side effects. However, not everyone who takes the medication will have problems. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are treated easily by you or your healthcare provider.
(This article covers many, but not all, of the possible side effects with MiraLAX. Your healthcare provider can discuss a more complete list with you.)

Common Side Effects of MiraLAX

The prescribing information for prescription medications contains the exact percentage of side effects that occurred in clinical trials. However, information for over-the-counter (OTC) medications, such as MiraLAX, is less inclusive. Therefore, it can be difficult to know exactly what problems may occur and how common they may be.
MiraLAX used to be available only with a prescription. The older prescribing information contained some information about potential MiraLAX side effects. Because the active ingredient and dose are the same for the prescription and nonprescription forms, possible side effects should also be the same.
Based on this older prescribing information, possible side effects of MiraLAX may include:
  • Nausea
  • Abdominal bloating (stomach bloating)
  • Cramping
  • Gas
  • Diarrhea
  • Frequent stools.

MiraLAX Medication Information

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