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Active Ingredient in MiraLAX

If you have occasional constipation, you may benefit from MiraLAX® (polyethylene glycol 3350). The active ingredient in MiraLAX is polyethylene glycol 3350 (sometimes abbreviated as PEG-3350), which is an osmotic laxative.
 
This laxative works by drawing water into the colon, making the stool soft, and increasing the number of bowel movements. MiraLAX will usually cause a bowel movement in one to three days.
 
It is important to note that MiraLAX does not contain any inactive ingredients.
 
This product was originally available by prescription only. In fact, a generic version of MiraLAX is still available as a prescription medication. The prescription version is exactly the same as the over-the-counter (OTC) version, but is more likely to be covered by insurance.
 
(If you are looking for more information on the active ingredient in this laxative, click MiraLAX. This full-length article offers important information you should be aware of before using it, including possible side effects, dosing instructions, and general safety precautions.)
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