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

Summary:

Gad 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 2 - 5 years also take Vioxx, and have Depression.

The phase IV clinical study analyzes which people have Gad 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 249,189 Synthroid users. Check the latest studies of Synthroid.

What is Gad?

Gad is found to be associated with 849 drugs and 1,474 conditions by eHealthMe. Check the latest studies of Gad.

On Jan, 15, 2026

237,758 people reported to have side effects when taking Synthroid.
Among them, 167 people (0.07%) have Gad.

Among these 167 people:

* Approximation only. Some reports may have incomplete information.

Do you take Synthroid and have Gad?

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Related studies:

Effectiveness of, long term effects of, and alternative drugs to Synthroid:

Synthroid (249,189 reports)

Gad treatments and more:

Gad (31,248 reports)

How severe was Gad and when was it recovered:

Gad in Synthroid

Expand to all the drugs that have ingredients of levothyroxine sodium:

Gad and drugs with ingredients of levothyroxine sodium (398 reports)

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:

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 Gad:

Vioxx side effect: Gad (562 reports)
Fosamax side effect: Gad (475 reports)
Aspirin side effect: Gad (349 reports)
Xanax side effect: Gad (345 reports)
Prednisone side effect: Gad (279 reports)
Singulair side effect: Gad (266 reports)
Diazepam side effect: Gad (258 reports)
Ibu side effect: Gad (246 reports)
Zoloft side effect: Gad (245 reports)
Profen side effect: Gad (242 reports)

Browse all the drugs that are associated with Gad:

Gad (849 drugs)

Common conditions associated with Gad:

Antidepressant therapy: 526 reports
Blood pressure increased: 462 reports
Osteoporosis: 435 reports
Pain: 423 reports
Alternative medicine - pain relief: 422 reports
Anxiety, apprehension, feeling uptight, jitters, stress, stress and anxiety, tension: 399 reports
Acupuncture and pain: 229 reports
Asthma: 204 reports
Osteopenia: 203 reports
Ms hug: 200 reports

Browse all the conditions that are associated with Gad:

Gad (1,474 conditions)

Drugs similar to Synthroid and Gad :

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.