Synthroid and Ed - a phase IV clinical study of FDA data

Summary:

Ed is reported as a side effect among people who take Synthroid (levothyroxine sodium), especially for people who are male, 60+ old, have been taking the drug for 5 - 10 years also take Viagra, and have High blood pressure.

The phase IV clinical study analyzes which people have Ed 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 249,174 Synthroid users. Check the latest studies of Synthroid.

What is Ed?

Ed is found to be associated with 1,309 drugs and 1,989 conditions by eHealthMe. Check the latest studies of Ed.

On Nov, 27, 2025

237,758 people reported to have side effects when taking Synthroid.
Among them, 343 people (0.14%) have Ed.

Among these 343 people:

How long have people been on Synthroid when they have Ed? *

What is the gender of people who have Ed when taking Synthroid? *

female: 13.81 %
male: 86.19 %

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

What are other drugs people take besides Synthroid? *

What are other side effects people have besides Ed? *

Fatigue (feeling of tiredness): 76 people, 22.16%
Stress And Anxiety: 66 people, 19.24%
Weakness: 60 people, 17.49%
Depression: 52 people, 15.16%
Nausea (feeling of having an urge to vomit): 46 people, 13.41%
Headache (pain in head): 45 people, 13.12%
Pain: 44 people, 12.83%
Insomnia (sleeplessness): 42 people, 12.24%
Libido Decreased (loss of interest in sex): 39 people, 11.37%
Diarrhea: 35 people, 10.20%

What are the existing conditions these people have? *

High Blood Pressure: 37 people, 10.79%
Depression: 33 people, 9.62%
Pain: 32 people, 9.33%
High Blood Cholesterol: 23 people, 6.71%
Insomnia (sleeplessness): 18 people, 5.25%
Multiple Myeloma (cancer of the plasma cells): 17 people, 4.96%
Enlarged Prostate: 15 people, 4.37%
Blood Testosterone Decreased: 14 people, 4.08%
Neoplasm Malignant (cancer tumour): 12 people, 3.50%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 12 people, 3.50%

* Approximation only. Some reports may have incomplete information.

Do you take Synthroid and have Ed?

- Check whether Ed 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 (249,174 reports)

Ed treatments and more:

Ed (80,334 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

Common drugs associated with Ed:

Propecia side effect: Ed (4,164 reports)
Viagra side effect: Ed (2,800 reports)
Finasteride side effect: Ed (2,433 reports)
Levitra side effect: Ed (2,130 reports)
Aspirin side effect: Ed (1,608 reports)
Abilify side effect: Ed (1,519 reports)
Risperdal side effect: Ed (1,457 reports)
Zyprexa side effect: Ed (1,279 reports)
Lipitor side effect: Ed (1,269 reports)
Lisinopril side effect: Ed (1,009 reports)

Browse all the drugs that are associated with Ed:

Ed (1,309 drugs)

Common conditions associated with Ed:

Alopecia: 2,770 reports
Hair loss: 2,769 reports
Erectile dysfunction: 2,724 reports
Antidepressant therapy: 2,680 reports
Depression: 2,669 reports
Impotence and age: 2,647 reports
Erection problems: 2,625 reports
Ed: 2,565 reports
Drugs that may cause impotence: 2,555 reports
Androgenetic alopecia: 2,193 reports

Browse all the conditions that are associated with Ed:

Ed (1,989 conditions)

Drugs similar to Synthroid and Ed :

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.