Synthroid and Vaginal fistula - a phase IV clinical study of FDA data

Summary:

Vaginal fistula is reported as a side effect among people who take Synthroid (levothyroxine sodium), especially for people who are 50-59 old, also take Fosamax, and have Crohn's disease.

The phase IV clinical study analyzes which people have Vaginal fistula when taking Synthroid. It is created by eHealthMe based on reports of 237,758 people who have side effects when taking Synthroid from the FDA, and is updated regularly.

What is Synthroid?

Synthroid has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. eHealthMe is studying from 249,198 Synthroid users. Check the latest studies of Synthroid.

What is Vaginal fistula?

Vaginal fistula (fistula or abnormal connection between the rectum and the vagina) is found to be associated with 48 drugs and 287 conditions by eHealthMe. Check the latest studies of Vaginal fistula.

On Jul, 12, 2026

237,758 people reported to have side effects when taking Synthroid.
Among them, 19 people (0.01%) have Vaginal fistula.

Among these 19 people:

What is the age of people who have Vaginal fistula when taking Synthroid? *

What are other drugs people take besides Synthroid? *

Boniva: 8 people, 42.11%
Fosamax: 8 people, 42.11%
Aciphex: 7 people, 36.84%
Gabapentin: 7 people, 36.84%
Pantoprazole: 7 people, 36.84%
Hydrochlorothiazide: 7 people, 36.84%
Midamor: 7 people, 36.84%
Nexium: 6 people, 31.58%
Duloxetine Hydrochloride: 2 people, 10.53%
Amitriptyline Hydrochloride: 2 people, 10.53%

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

Abdominal Pain: 10 people, 52.63%
High Blood Pressure: 10 people, 52.63%
Depression: 8 people, 42.11%
Insomnia (sleeplessness): 8 people, 42.11%
Low Turnover Osteopathy (slow removal of old bone and its replacement by new bone): 8 people, 42.11%
Hip Fracture: 8 people, 42.11%
High Blood Cholesterol: 8 people, 42.11%
Haematuria (presence of blood in urine): 8 people, 42.11%
Gastrointestinal Ulcer: 8 people, 42.11%
Foot Fracture: 8 people, 42.11%

What are the existing conditions these people have? *

Osteopenia (a condition where bone mineral density is lower than normal): 8 people, 42.11%
Crohn's Disease (a condition that causes inflammation of the gastrointestinal tract): 8 people, 42.11%
Stress And Anxiety: 2 people, 10.53%
High Blood Pressure: 2 people, 10.53%
Endometrial Cancer: 1 person, 5.26%
Back Pain: 1 person, 5.26%
Colorectal Cancer Metastatic (cancer of colon and rectal spreads to other parts): 1 person, 5.26%
Depression: 1 person, 5.26%
Disturbance In Attention: 1 person, 5.26%
Dry Eyes (lack of adequate tears): 1 person, 5.26%

* Approximation only. Some reports may have incomplete information.

Do you take Synthroid and have Vaginal fistula?

- Check whether Vaginal fistula 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 Synthroid:

Synthroid (249,198 reports)

Browse all side effects of Synthroid:

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 fistula:

Vaginal fistula (48 drugs)

Browse all the conditions that are associated with Vaginal fistula:

Vaginal fistula (287 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on levothyroxine sodium (the active ingredients of Synthroid) and Synthroid (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.