Miralax and Obstruction - from FDA reports

Obstruction is found among people who take Miralax, especially for people who are female, 60+ old , have been taking the drug for < 1 month, also take medication Aspirin, and have Atrial fibrillation/flutter. This study is created by eHealthMe based on reports of 35,362 people who have side effects when taking Miralax from FDA, and is updated regularly.

Who is eHealthMe: we are a data analysis company who specializes in health care industry. Our independent and original studies have been referenced on 400+ peer-reviewed medical publications, including The Lancet, Mayo Clinic Proceedings, and EANO.

On Aug, 18, 2018

35,362 people reported to have side effects when taking Miralax.
Among them, 9 people (0.03%) have Obstruction

Number of reports submitted per year:

Could Miralax cause Obstruction?

Time on Miralax when people have Obstruction *:

  • < 1 month: 100 %
  • 1 - 6 months: 0.0 %
  • 6 - 12 months: 0.0 %
  • 1 - 2 years: 0.0 %
  • 2 - 5 years: 0.0 %
  • 5 - 10 years: 0.0 %
  • 10+ years: 0.0 %

Gender of people who have Obstruction when taking Miralax *:

  • female: 77.78 %
  • male: 22.22 %

Age of people who have Obstruction when taking Miralax *:

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 16.67 %
  • 30-39: 0.0 %
  • 40-49: 0.0 %
  • 50-59: 16.67 %
  • 60+: 66.67 %

Top conditions involved for these people *:

  1. Short-Bowel Syndrome (a condition in which the body cannot absorb enough fluids and nutrients because part of the small intestine is missing): 1 person, 11.11%
  2. Preventive Health Care: 1 person, 11.11%
  3. Intestinal Obstruction: 1 person, 11.11%
  4. Colonoscopy: 1 person, 11.11%
  5. Atrial Fibrillation/flutter (atrial fibrillation and flutter are abnormal heart rhythms in which the atria, or upper chambers of the heart, are out of sync with the ventricles): 1 person, 11.11%
Check whether a drug or a condition causes Obstruction

Top co-used drugs for these people *:

  1. Imdur: 2 people, 22.22%
  2. Aspirin: 2 people, 22.22%
  3. Zofran: 1 person, 11.11%
  4. Cozaar: 1 person, 11.11%
  5. Januvia: 1 person, 11.11%
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Top other side effects for these people *:

  1. Drug Ineffective: 3 people, 33.33%
  2. Diarrhea: 3 people, 33.33%
  3. Pain: 3 people, 33.33%
  4. Hypotension (abnormally low blood pressure): 2 people, 22.22%
  5. Anaemia (lack of blood): 2 people, 22.22%
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* Approximation only. Some reports may have incomplete information.

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Miralax has active ingredients of polyethylene glycol 3350. It is often used in constipation. (latest outcomes from Miralax 35,967 users)


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NOTE: The study is based on active ingredients and brand name. Other drugs that have the same active ingredients (e.g. generic drugs) are NOT considered.

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