MiraLAX is a type of laxative approved to treat occasional constipation. Although it was originally available only with a prescription, it is now available as an over-the-counter, nonprescription product. The medication comes in powder form, which is dissolved in liquid and swallowed once daily. Although most people tolerate it well, side effects are possible and may include nausea and diarrhea, among others.
What Is MiraLAX?MiraLAX® (polyethylene glycol 3350) is an over-the-counter (OTC) medication used to treat occasional constipation. It belongs to a class of drugs called laxatives. Like all OTC medications, it is available without a prescription.
MiraLAX was originally available by prescription only. In fact, a generic version is still available as a prescription medication. The prescription version is exactly the same as the over-the-counter version, but is more likely to be covered by insurance.