Miralax and Myositis - a phase IV clinical study of FDA data

Summary:

Myositis is reported as a side effect among people who take Miralax (polyethylene glycol 3350), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Aredia, and have Multiple myeloma.

The phase IV clinical study analyzes which people have Myositis when taking Miralax. It is created by eHealthMe based on reports of 80,819 people who have side effects when taking Miralax from the FDA, and is updated regularly.

What is Miralax?

Miralax has active ingredients of polyethylene glycol 3350. It is often used in constipation. eHealthMe is studying from 81,754 Miralax users. Check the latest studies of Miralax.

What is Myositis?

Myositis (inflammation of the muscles) is found to be associated with 827 drugs and 1,138 conditions by eHealthMe. Check the latest studies of Myositis.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Sep, 02, 2026

80,819 people reported to have side effects when taking Miralax.
Among them, 51 people (0.06%) have Myositis.

Among these 51 people:

How long have people been on Miralax when they have Myositis? *

What is the gender of people who have Myositis when taking Miralax? *

female: 60 %
male: 40 %

What is the age of people who have Myositis when taking Miralax? *

What are other drugs people take besides Miralax? *

What are other side effects people have besides Myositis? *

Pain: 32 people, 62.75%
Fatigue (feeling of tiredness): 31 people, 60.78%
Stress And Anxiety: 29 people, 56.86%
Osteonecrosis Of Jaw (death of bone of jaw): 27 people, 52.94%
Weakness: 26 people, 50.98%
Pneumonia: 26 people, 50.98%
Multiple Myeloma (cancer of the plasma cells): 25 people, 49.02%
Bone Disorder: 25 people, 49.02%
Osteopenia (a condition where bone mineral density is lower than normal): 25 people, 49.02%
Intervertebral Disc Protrusion (spinal disc protrusion): 24 people, 47.06%

What are the existing conditions these people have? *

Prostatitis (inflammation of the prostate gland): 6 people, 11.76%
Multiple Myeloma (cancer of the plasma cells): 6 people, 11.76%
Pain: 3 people, 5.88%
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect): 2 people, 3.92%
Hypocalcaemia (levels of calcium in blood serum are abnormally low): 2 people, 3.92%
Hypokalemia (low potassium): 2 people, 3.92%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 2 people, 3.92%
Transitional Cell Carcinoma Metastatic (cancer of urinary inner most layer spreads to other part of body): 2 people, 3.92%
Lung Cancer - Non-Small Cell (lung cancer): 2 people, 3.92%
Nausea And Vomiting: 2 people, 3.92%

* Approximation only. Some reports may have incomplete information.

Do you take Miralax and have Myositis?

- Check whether Myositis is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously

Related studies:

Effectiveness of, long term effects of, and alternative drugs to Miralax:

Miralax (81,754 reports)

Myositis treatments and more:

Myositis (13,181 reports)

Browse all side effects of Miralax:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Browse all the drugs that are associated with Myositis:

Myositis (827 drugs)

Browse all the conditions that are associated with Myositis:

Myositis (1,138 conditions)

Related publications that referenced our studies

Proti? D, Balti? S, Stupar N, Pavlov-Dolijanovi? S, Mugo?a S, Todorovi? Z, "A case of myositis with immunological background associated with statin use", Open Medicine, 2014 Oct .
Proti? D, Balti? S, Stupar N, Pavlov-Dolijanovi? S, Mugo?a S, Todorovi? Z, "A case of myositis with immunological background associated with statin use", Open Medicine, 2014 Oct .

How the study uses the data?

The study uses data from the FDA. It is based on polyethylene glycol 3350 (the active ingredients of Miralax) and Miralax (the brand name). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered. Dosage of drugs is not considered in the study.

How to use the study?

DO NOT STOP MEDICATIONS without first consulting your doctor. If there are any serious or long term adverse effects discovered in the study, discuss the study with your doctor to ensure that proper medication management will be in place if applicable.

Who is eHealthMe?

With medical big data and proven AI/ML algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. We study millions of patients and 5,000 more each day. Results of our real-world drug study have been referenced on 800+ peer-reviewed medical publications, including The Lancet, Mayo Clinic Proceedings, and Nature. Our analysis results are available to researchers, health care professionals, patients (testimonials), and software developers (open API).

WARNING, DISCLAIMER, USE FOR PUBLICATION

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on eHealthMe.com is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only. Our phase IV clinical studies alone cannot establish cause-effect relationship. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.