Propecia and Hyperthyroidism - a phase IV clinical study of FDA data

Summary:

Hyperthyroidism is reported as a side effect among people who take Propecia (finasteride), especially for people who are male, 30-39 old, have been taking the drug for 2 - 5 years also take Synthroid, and have Androgenetic alopecia.

The phase IV clinical study analyzes which people have Hyperthyroidism when taking Propecia. It is created by eHealthMe based on reports of 9,411 people who have side effects when taking Propecia from the FDA, and is updated regularly.

What is Propecia?

Propecia has active ingredients of finasteride. It is often used in hair loss. eHealthMe is studying from 9,757 Propecia users. Check the latest studies of Propecia.

What is Hyperthyroidism?

Hyperthyroidism (over activity of the thyroid gland) is found to be associated with 972 drugs and 1,438 conditions by eHealthMe. Check the latest studies of Hyperthyroidism.

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, 03, 2026

9,411 people reported to have side effects when taking Propecia.
Among them, 22 people (0.23%) have Hyperthyroidism.

Among these 22 people:

How long have people been on Propecia when they have Hyperthyroidism? *

What is the gender of people who have Hyperthyroidism when taking Propecia? *

female: 0.0 %
male: 100 %

What is the age of people who have Hyperthyroidism when taking Propecia? *

What are other drugs people take besides Propecia? *

What are other side effects people have besides Hyperthyroidism? *

Erection Problems: 13 people, 59.09%
Depression: 12 people, 54.55%
Stress And Anxiety: 11 people, 50.00%
Libido Decreased (loss of interest in sex): 7 people, 31.82%
Hypersensitivity: 7 people, 31.82%
Pollakiuria (abnormally frequent passage of relatively small quantities or urine): 6 people, 27.27%
Blood Testosterone Decreased: 6 people, 27.27%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 6 people, 27.27%
Semen Volume Decreased: 5 people, 22.73%
Prostatitis (inflammation of the prostate gland): 5 people, 22.73%

What are the existing conditions these people have? *

Androgenetic Alopecia (common form of hair loss): 3 people, 13.64%
Seborrhea: 2 people, 9.09%
Metastatic Renal Cell Carcinoma (spreadable kidney cell tumour): 2 people, 9.09%
Enlarged Prostate: 2 people, 9.09%
Acne (skin problems that cause pimples): 2 people, 9.09%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 1 person, 4.55%
Hyperlipidaemia (presence of excess lipids in the blood): 1 person, 4.55%
High Blood Pressure: 1 person, 4.55%

* Approximation only. Some reports may have incomplete information.

Do you take Propecia and have Hyperthyroidism?

- Check whether Hyperthyroidism 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 Propecia:

Propecia (9,757 reports)

Hyperthyroidism treatments and more:

Hyperthyroidism (26,833 reports)

Browse all side effects of Propecia:

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 Hyperthyroidism:

Hyperthyroidism (972 drugs)

Browse all the conditions that are associated with Hyperthyroidism:

Hyperthyroidism (1,438 conditions)

Related publications that referenced our studies

Fouda AM, Bazeed AM, "Hematuria and Hematospermia Associated with the Use of Finasteride for the Treatment of Androgenic Alopecia: A Case Report", Drug Safety-Case Reports, 2017 Dec .
Dulani S, Dulani R, Lele S, Diagavane S, Anjankar S, Jaiswal N, Subramaniam PS, Juneja R, "Chronic Subdural Haematoma in a Case of Hyperthyroidism Presenting with Papilledema", Chinese Medicine, 2012 Dec .
Fouda AM, Bazeed AM, "Hematuria and Hematospermia Associated with the Use of Finasteride for the Treatment of Androgenic Alopecia: A Case Report", Drug Safety-Case Reports, 2017 Dec .
Dulani S, Dulani R, Lele S, Diagavane S, Anjankar S, Jaiswal N, Subramaniam PS, Juneja R, "Chronic Subdural Haematoma in a Case of Hyperthyroidism Presenting with Papilledema", Chinese Medicine, 2012 Dec .

How the study uses the data?

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