How long for miralax to work

Get help now: Ask doctors free Educational text. Similar questions A year-old member asked:. Remember, it is an osmotic agent that draws water into the stool and hence makes it easier to have a bowel movement.

Russell Juno answered. General Surgery 22 years experience. Either time if good. If it is later then try it in the evening. If no effects by morning then repeat a dose. Philip Gasseling answered. Few days: not really laxative to induce bowel contractions but a nonabsorbable material that cause the stools to become softer, and lubricates the bowel to cause easier passage of stool.

Brooklyn, NY. Liesa Harte answered. Family Medicine 29 years experience. Miralax polyethylene glycol : You can take miralax polyethylene glycol indefinitely as long as you need it.

Best wishes. Peter Kurzweil answered. Internal Medicine 50 years experience. Hours to days. It probably needs to be taken daily to be effective. It is not like milk of magnesia or citrate of mnagnesia, which should only take few hours to be effective. Charles Cattano answered.

Gastroenterology 39 years experience. As a once over-the-counter dosed laxative you may not see results for days, but as a multi-dosed colonoscopy preparation when used under doctor's advice expect laxation within hours.

Related questions A year-old female asked:. It is not absorbed by the body and does not cause tachyphylaxis i. It is important to note that Miralax can be used for bowel evacuation prior to a colonoscopy in addition to relieving of occasional constipation.

The usual dose of Miralax for constipation is 17 grams one capful in 8 ounces of liquid. This is the dose that will begin to work in 12 to 72 hours. When used for a colonoscopy prep, much higher doses are needed in conjunction with large volumes of water.

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Questions Articles Drugs Interactions Ask a pharmacist. Published: Nov 22, Last Updated: Oct 28, How Fast Does Miralax Work? Answered By: Dr. Brian Staiger Pharm. Nov 22, A small percentage of MiraLax is absorbed into the blood and excreted through the kidneys. The average time MiraLax takes to be cleaned from your blood is about 18 hours after the last dose. The picture shows the trend of plasma concentration of MiraLax with time hours. But you should note the dose of MiraLax is very minimal, and your body can eliminate it safely even with mild degrees of kidney impairment.

Polyethylene glycol the active ingredient in MiraLax has a good safety profile across studies. The usual dose of MiraLax is 17 grams in 8 ounces of fluid once daily. During Colon Preparation, You may repeat the above dose every minutes. This continues until 2 liters of fluid is consumed in one day. Such a Megadose of MiraLax may raise the question about its safety. However, MiraLax mega doses during colon preparation are widely used and proved to be safe even in children reference.

But some reports correlated polyethylene glycol used in children for a long period or larger doses To complications. The FDA has received reports of complications such as metabolic acidosis and neurological and psychiatric complications in children reference.

However, There was no confirmed causal relationship between MiraLax and such side effects. As we explained before, MiraLax is considered a safe medication. The most commonly reported side effect is diarrhea which is not bad for you if you have constipation. Other side effects with their frequency are enlisted in the table below reference.

Nausea and vomiting are very common during the use of MiraLax for colon preparation for colonoscopy. This is because larger doses are less tolerated by your stomach and digestive tract.

How long does MiraLax stay in your systems digestive systems and blood?