Skip to content

How long does MiraLAX cleanout take?

4 min read

While standard MiraLAX use for occasional constipation typically provides a bowel movement within 1 to 3 days, a medically-supervised MiraLAX cleanout is designed to work much faster. This more aggressive regimen, often used for severe constipation or colonoscopy prep, typically takes several hours to a full day to complete, though the specific timeline depends on the exact protocol.

Quick Summary

A MiraLAX cleanout duration depends on the protocol used, typically ranging from a few hours to a full day. This comprehensive process, often involving large doses and a clear liquid diet, differs significantly from standard use for occasional constipation. It is used for medical procedures like colonoscopies or to address severe constipation by flushing the colon.

Key Points

  • Timeline Varies by Purpose: A cleanout for a colonoscopy is a rapid, 24-hour process, while one for severe constipation can take 1 to 3 days.

  • Colonoscopy Prep is a Structured Process: It typically involves a large dose of MiraLAX over several hours, preceded by dietary changes.

  • Chronic Constipation Cleanout is a Multi-Day Event: It may involve higher, multi-day dosing under medical supervision.

  • First Bowel Movement is Within an Hour (usually): When drinking the large-volume prep solution, bowel movements often begin within 30 to 60 minutes.

  • The Cleanout Is Complete When Stool is Clear: Success is measured by the clarity and watery consistency of the stool.

  • Stay Hydrated and Manage Side Effects: High doses can cause nausea and cramping, which can be managed by drinking slowly and using a chilled liquid.

  • Always Follow a Doctor's Protocol: A cleanout should only be undertaken with specific medical guidance, as it involves higher doses than standard use.

In This Article

A MiraLAX cleanout is a potent, medically-directed procedure designed to completely clear the bowels. Unlike the gentle, daily use of MiraLAX for occasional constipation, a cleanout is a serious undertaking requiring specific instructions from a healthcare provider. The total duration is influenced by factors like the specific protocol, the amount of stool to be cleared, and the individual's response. For a colonoscopy preparation, the process is typically completed over a 24-hour period, with the main laxative-drinking phase lasting several hours. In cases of severe chronic constipation, a cleanout may be a multi-day process.

The Timeline for a Colonoscopy MiraLAX Cleanout

For a colonoscopy, the goal is to achieve watery, clear or yellowish stool, indicating a fully cleansed colon. The timeline is typically structured as follows:

  • Day Before Procedure:

    • Low-Residue Diet: Two to three days before the cleanout, you may be instructed to begin a low-fiber, low-residue diet to reduce the bulk in your colon.
    • Clear Liquid Diet: On the day before the procedure, you will switch to a clear liquid diet, which includes broth, water, clear juices, and popsicles. This is a crucial step to reduce the burden on your digestive system.
    • The Prep: The actual prep usually starts in the late afternoon or early evening. A large dose of MiraLAX powder (often the 238-gram bottle) is mixed into 64 ounces of a clear liquid like Gatorade. Many protocols also include a stimulant laxative like bisacodyl to accelerate the process.
    • Initial Bowel Movements: After beginning to drink the solution, bowel movements typically start within 30 to 60 minutes, though it can take longer. This phase can last several hours, with bowel movements becoming more frequent and watery.
  • Day of Procedure (Morning):

    • Second Dose: For some split-dose protocols, a second, smaller dose of the MiraLAX mixture is consumed the morning of the procedure, several hours before the appointment time.
    • Final Flush: The final dose, combined with continued clear fluid intake, helps achieve the final "clear" result required for the colonoscopy.

The Timeline for a Chronic Constipation Cleanout

For chronic or severe constipation, a cleanout may take longer than a single day. The goal is to evacuate significant, impacted stool over a few days in a more controlled, albeit still aggressive, manner.

  • Multi-day Process: A common regimen might involve higher-than-normal daily doses of MiraLAX for up to three days, often in combination with other laxatives under medical supervision.
  • Slower Onset: The initial effects may not be as immediate as a colonoscopy prep, but the sustained high dosage and hydration over several days will effectively clear the backlog.
  • Maintenance: Following the cleanout, a doctor will typically prescribe a daily maintenance dose of MiraLAX to prevent the problem from recurring.

Comparison of Cleanout Types

Feature Colonoscopy Prep Cleanout Chronic Constipation Cleanout
Goal Achieve a completely empty, clear bowel for a medical procedure. Relieve severe or impacted stool blockage and reset the system.
Timeline Typically a 24-hour process, with the drinking phase lasting 4-8 hours. Can take 1 to 3 full days to complete, depending on severity and protocol.
Dosage A single, large batch of MiraLAX (238g) mixed in 64 oz of liquid, sometimes split into two doses. Higher daily doses of MiraLAX, potentially paired with a stimulant, over multiple days.
Dietary Restriction Strict clear liquid diet on the day of the prep. Often a clear liquid diet during the intense phase, with a return to a specific maintenance diet afterward.
Medical Supervision Mandated and strictly outlined by the ordering physician. Recommended, especially for children or persistent issues, to manage dosage and side effects.

Potential Side Effects and Management

Because a MiraLAX cleanout involves a high dosage, it can lead to more pronounced side effects than standard use. Common side effects include nausea, cramping, gas, and bloating. To manage these, drinking the solution slowly, possibly with a chilled beverage, can help. Staying home and close to a bathroom is essential. For rectal irritation from frequent bowel movements, applying an ointment can provide relief. Staying well-hydrated with plenty of clear liquids is also critical to prevent dehydration.

Conclusion: How long does MiraLAX cleanout take?

In conclusion, the duration of a MiraLAX cleanout is dependent on its purpose. For a colonoscopy, the process is compressed into a tight timeframe, usually less than 24 hours, to ensure the bowel is clear for the procedure. For severe constipation, a cleanout can span two to three days to effectively resolve the impaction. In both scenarios, following a doctor's instructions precisely, staying hydrated, and being prepared for frequent bowel movements is key. Always consult a healthcare professional before beginning a cleanout, especially with higher-than-recommended doses, to ensure it is appropriate and safe for your specific condition.

Frequently Asked Questions

The initial bowel movements from a colonoscopy cleanout can start as quickly as 30 to 60 minutes after beginning to drink the large-volume solution. The entire prep phase, which involves drinking the solution over several hours, takes 4 to 8 hours to complete.

Due to the high dosage, common side effects include nausea, stomach cramping, bloating, and gas. Drinking the solution slowly or chilling it can help reduce nausea.

Most medical protocols recommend mixing the MiraLAX with a clear, non-red-colored electrolyte drink, such as Gatorade or Powerade. You can also use clear juices or water.

While it can be started in one day, a cleanout for severe, chronic constipation is often a multi-day process to ensure thorough evacuation. Medical supervision is recommended for the correct dosage and timing.

The cleanout is considered complete when your bowel movements are clear, watery, and a light yellow or greenish color, with no solid particles. Some protocols describe this as looking like 'pickle juice'.

During the active cleanout phase, you should only consume clear liquids, such as broth, clear juices, popsicles, and water. A low-fiber diet may be recommended in the days leading up to it.

MiraLAX cleanouts are sometimes used for children with severe constipation, but they must be done under strict medical supervision from a pediatrician or pediatric gastroenterologist.

References

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13

Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.