Synthroid and Progesterone decreased - a phase IV clinical study of FDA data

Summary:

Progesterone decreased is reported as a side effect among people who take Synthroid (levothyroxine sodium), especially for people who are female, 40-49 old, have been taking the drug for 6 - 12 months also take Xyrem, and have Narcolepsy.

The phase IV clinical study analyzes which people have Progesterone decreased 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 249,205 Synthroid users. Check the latest studies of Synthroid.

What is Progesterone decreased?

Progesterone decreased is found to be associated with 34 drugs and 138 conditions by eHealthMe. Check the latest studies of Progesterone decreased.

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

237,758 people reported to have side effects when taking Synthroid.
Among them, 15 people (0.01%) have Progesterone decreased.

Could Synthroid cause Progesterone decreased?

Among these 15 people:

How long have people been on Synthroid when they have Progesterone decreased? *

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

female: 100 %
male: 0.0 %

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

What are other drugs people take besides Synthroid? *

Cymbalta: 9 people, 60.00%
Xyrem: 9 people, 60.00%
Vitamin D3: 7 people, 46.67%
Oxycontin: 6 people, 40.00%
Ritalin: 6 people, 40.00%
Nucynta: 6 people, 40.00%
Norco: 6 people, 40.00%
Movantik: 6 people, 40.00%
Adderall: 6 people, 40.00%
Hydrocodone Bitartrate And Acetaminophen: 6 people, 40.00%

What are other side effects people have besides Progesterone decreased? *

Malignant Melanoma (skin cancer rises from melancytes): 6 people, 40.00%
Kidney Enlargement: 6 people, 40.00%
Immune System Disorder: 6 people, 40.00%
Osteoarthritis (a joint disease caused by cartilage loss in a joint): 6 people, 40.00%
Gastritis (inflammation of stomach): 6 people, 40.00%
Alcohol Intolerance: 6 people, 40.00%
Scar: 5 people, 33.33%
Abdominal Discomfort: 5 people, 33.33%
Adrenal Disorder: 4 people, 26.67%
Drug Ineffective: 4 people, 26.67%

What are the existing conditions these people have? *

Cataplexy (loss of muscle tone accompanied by full conscious awareness): 9 people, 60.00%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 9 people, 60.00%
Pain: 3 people, 20.00%
Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 2 people, 13.33%
Fatigue (feeling of tiredness): 2 people, 13.33%
Adverse Drug Reaction: 2 people, 13.33%
Inflammation: 1 person, 6.67%
Hypertensive Crisis: 1 person, 6.67%
Heart Rate Increased: 1 person, 6.67%
Psychomotor Hyperactivity (feelings of extreme restlessness): 1 person, 6.67%

* Approximation only. Some reports may have incomplete information.

Do you take Synthroid and have Progesterone decreased?

- Check whether Progesterone decreased 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 (249,205 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 Progesterone decreased:

Progesterone decreased (34 drugs)

Browse all the conditions that are associated with Progesterone decreased:

Progesterone decreased (138 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.