Synthroid and Under active thyroids - a phase IV clinical study of FDA data
Summary:
Under active thyroids is reported as a side effect among people who take Synthroid (levothyroxine sodium), especially for people who are female, 60+ old, have been taking the drug for 10+ years also take Lasix, and have Rheumatoid arthritis.
The phase IV clinical study analyzes which people have Under active thyroids 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 249,182 Synthroid users. Check the latest studies of Synthroid.
What is Under active thyroids?
Under active thyroids is found to be associated with 2,678 drugs and 2,608 conditions by eHealthMe. Check the latest studies of Under active thyroids.
237,758 people reported to have side effects when taking Synthroid.
Among them, 3,676 people (1.55%) have Under active thyroids.

Among these 3,676 people:
How long have people been on Synthroid when they have Under active thyroids? *
What is the gender of people who have Under active thyroids when taking Synthroid? *
What is the age of people who have Under active thyroids when taking Synthroid? *
What are other drugs people take besides Synthroid? *
What are other side effects people have besides Under active thyroids? *
What are the existing conditions these people have? *
* Approximation only. Some reports may have incomplete information.
Do you take Synthroid and have Under active thyroids?
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Related studies:
Effectiveness of, long term effects of, and alternative drugs to Synthroid:
- Synthroid (249,182 reports)
Under active thyroids treatments and more:
- Under active thyroids (168,015 reports)
How severe was Under active thyroids and when was it recovered:
Expand to all the drugs that have ingredients of levothyroxine sodium:
Sub-studies by gender and age:
Female: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+
Male: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+
Common Synthroid side effects:
- Synthroid side effect: Nausea (feeling of having an urge to vomit) (19,698 reports)
- Synthroid side effect: Headache (pain in head) (16,760 reports)
- Synthroid side effect: Weakness (15,162 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 zCommon drugs associated with Under active thyroids:
- Synthroid side effect: Under active thyroids (3,676 reports)
- Prednisone side effect: Under active thyroids (2,540 reports)
- Fosamax side effect: Under active thyroids (2,486 reports)
- Levothyroxine sodium side effect: Under active thyroids (2,407 reports)
- Aspirin side effect: Under active thyroids (2,085 reports)
- Keytruda side effect: Under active thyroids (1,828 reports)
- Metformin side effect: Under active thyroids (1,581 reports)
- Pantoprazole side effect: Under active thyroids (1,404 reports)
- Methotrexate side effect: Under active thyroids (1,265 reports)
- Furosemide side effect: Under active thyroids (1,244 reports)
Browse all the drugs that are associated with Under active thyroids:
- Under active thyroids (2,678 drugs)
Common conditions associated with Under active thyroids:
- High blood pressure: 2,349 reports
- Osteoporosis: 2,226 reports
- Thin bones: 2,139 reports
- Hypothyroidy: 1,680 reports
- Rheumatoid arthritis: 1,641 reports
- Low thyroid: 1,572 reports
- Renal cell carcinoma: 1,475 reports
- Depression: 1,352 reports
- Ms hug: 1,348 reports
- Underactive thyroid: 1,216 reports
Browse all the conditions that are associated with Under active thyroids:
- Under active thyroids (2,608 conditions)
Drugs similar to Synthroid and Under active thyroids :
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.
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