How Long Does It Take For Miralax To Work (And Why)?

How Long Does It Take For Miralax To Work (And Why)?

Exact Answer: 2 Days

Even when people exercise regularly and eat healthy, sometimes minor illnesses and health discomfort are common. There are times at which even the healthiest person gets diseases. Everybody is different and has different physical and chemical characteristics. Some people have a high metabolism rate, and some have low metabolism. The health characteristics can be based on genetics, environmental factors, food intake, and much more.

There are many common health issues like headaches, stomachaches, and one of the common illnesses other than these normal ones include common constipation. When people eat high-fiber food, they might feel their digestive system getting blocked from the fiber and this can cause occasional constipation.

For that osmotic laxative can be taken. One of the OTC medicinal options is MiraLAX and it helps with common constipation. After taking the medicine, it will take about 1 to 3 days for the medicine to work.

how long does it take for miralax to work

How Long Does It Take For Miralax To Work?

Time for the Miralax to work1 to 3 days
Duration the Miralax can be taken7 days
Time to visit the doctor if Miralax isn’t working7days

The name “osmotic laxatives” itself is related to the process of osmosis. It means that osmotic laxatives will help the body and digestive system with the movement of water. Osmotic laxatives will attract enough water and make sure they stay in the colon. Miralax will hydrate and sthe stool, which will cure constipation. This will unblock your system and help with gastrointestinal side effects. MiraLAX contains polyethylene glycol, which is an osmotic agent.

Miralax works well with water in the colon, and that unblocks the body’s digestive system. PEG 3350 present in the MiraLAX, is soluble and non-absorbable helps in hydrating the stool. It eases the stool by attracting water into the colon and the process is called osmosis. This also increases the volume of the stool and helps in stretches the wall of the bowel. Miralax triggers the defecation reflex, making the digestive system unblock.

There are many osmotic laxatives and Miralax is one of the best. Osmotic laxatives are available in chewable, tablets, syrup, and the most common form, powder. The method of intake depends upon the osmotic laxative and Miralax is available in the form of powder. Miralax can be mixed with any liquid, hot or cold and the dosage depends upon the individual and normally, a person takes about 4 to 8 ounces of the powder.

Why Does It Take That Long For Miralax To Work?

After taking Miralax, it will normally take about a day to three days for the medicine to work. The medicine can be taken for 7 days without any serious complications, and if Miralax doesn’t work even after taking the medicine for 7 days, it’s high time to consider visiting a medical expert. Miralax increases the frequency of bowel movement and reduces the strain. It also increases the consistency of the stool and if gastrointestinal side effects do occur, they are very mild and can be easily cured.

Miralax is both brand and generic, and it is an osmotic laxative that contains Polyethylene glycol 3350. It is available in the form of powder packets. The normal dosage is 17 grams, which can be mixed in 4 to 8 ounces of any drink or beverage. Stir the drink well and drinking the mix every day once for seven days can help with common constipation. For bowel preparation or any other specification, the doctor will provide further details.


People over 17 years of age can use this medicine, and it will produce bowel movements in 1 to 3 days. Miralax can be also used for any sort of bowel preparation, before surgeries like a colonoscopy. The common side-effects of taking Miralax include gas formation, cramps, and nausea. Some serious side effects include persistent diarrhea, bloody stools, severe stomach pain, and excessive bowel movements.

When the patient experiences any allergies apart from the common side effects like trouble breathing, swelling in the face, throat, and tongue, and itching, they must immediately consult a doctor to proceed further. Never consume Miralax if allergic to polyethylene glycol and the medical experts must know if the person consuming Miralax has kidney disease.


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