MiraLAX is an osmotic laxative. That means it draws water into the colon, which softens the stool and may naturally stimulate the colon to contract. These actions help ease bowel movements.

Will MiraLAX clear a blockage?

You should not use MiraLAX if you have a bowel obstruction or intestinal blockage.

Which laxative is best for impacted stool?

If the conservative route doesn’t work, Dr. Wolf recommends the osmotic laxative MiraLAX or a generic version. These hold water in stool to soften it and increase bowel movements.

Other possible treatments for fecal impaction include:
Laxatives. A doctor may recommend oral laxatives. Anal suppositories. Following insertion into the rectum, these will draw water into the area to soften the mass of stool.Water irrigation.