Methimazole and Vaginal bleeding - a phase IV clinical study of FDA data

Summary:

Vaginal bleeding is reported as a side effect among people who take Methimazole (methimazole), especially for people who are 40-49 old, also take Plan B One-Step, and have Atrial fibrillation/flutter.

The phase IV clinical study analyzes which people have Vaginal bleeding when taking Methimazole. It is created by eHealthMe based on reports of 7,420 people who have side effects when taking Methimazole from the FDA, and is updated regularly.

What is Methimazole?

Methimazole has active ingredients of methimazole. It is often used in hyperthyroidism. eHealthMe is studying from 8,016 Methimazole users. Check the latest studies of Methimazole.

What is Vaginal bleeding?

Vaginal bleeding is found to be associated with 1,130 drugs and 1,537 conditions by eHealthMe. Check the latest studies of Vaginal bleeding.

On Jul, 31, 2026

7,420 people reported to have side effects when taking Methimazole.
Among them, 11 people (0.15%) have Vaginal bleeding.

Could Methimazole cause Vaginal bleeding?

Among these 11 people:

What is the age of people who have Vaginal bleeding when taking Methimazole? *

What are other drugs people take besides Methimazole? *

What are other side effects people have besides Vaginal bleeding? *

Fatigue (feeling of tiredness): 2 people, 18.18%
White Blood Cell Count Decreased: 1 person, 9.09%
Eye Pain: 1 person, 9.09%
Hyperventilation: 1 person, 9.09%
Heavy Or Prolong Menstrual Bleeding: 1 person, 9.09%
Heart Palpitations (feelings or sensations that your heart is pounding or racing): 1 person, 9.09%
Haemorrhagic Cyst (bleeding cyst): 1 person, 9.09%
Haemoglobin Decreased: 1 person, 9.09%
Gait Disturbance: 1 person, 9.09%
Fever: 1 person, 9.09%

What are the existing conditions these people have? *

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): 2 people, 18.18%
Ovarian Cancer (cancer of ovary): 1 person, 9.09%
Nausea (feeling of having an urge to vomit): 1 person, 9.09%
Hypokalemia (low potassium): 1 person, 9.09%
High Blood Cholesterol: 1 person, 9.09%
Epilepsy (common and diverse set of chronic neurological disorders characterized by seizures): 1 person, 9.09%
Endocrine Ophthalmopathy (increased water content of retroocular orbital tissues; associated with thyroid disease, usually hyperthyroidism): 1 person, 9.09%
Constipation: 1 person, 9.09%
Bone Pain: 1 person, 9.09%
Basedow's Disease (autoimmune disease where the thyroid is overactive, producing an excessive amount of thyroid hormones): 1 person, 9.09%

* Approximation only. Some reports may have incomplete information.

Do you take Methimazole and have Vaginal bleeding?

- Check whether Vaginal bleeding 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 Methimazole:

Methimazole (8,016 reports)

Vaginal bleeding treatments and more:

Vaginal bleeding (49,485 reports)

Browse all side effects of Methimazole:

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 Vaginal bleeding:

Vaginal bleeding (1,130 drugs)

Browse all the conditions that are associated with Vaginal bleeding:

Vaginal bleeding (1,537 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on methimazole (the active ingredients of Methimazole) and Methimazole (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.