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

Summary:

Neutrophilia is reported as a side effect among people who take Synthroid (levothyroxine sodium), especially for people who are female, 60+ old, also take Vitamin D, and have Irritability.

The phase IV clinical study analyzes which people have Neutrophilia 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 Neutrophilia?

Neutrophilia is found to be associated with 333 drugs and 481 conditions by eHealthMe. Check the latest studies of Neutrophilia.

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, 01, 2026

237,758 people reported to have side effects when taking Synthroid.
Among them, 26 people (0.01%) have Neutrophilia.

Among these 26 people:

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

female: 100 %
male: 0.0 %

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

What are other drugs people take besides Synthroid? *

What are other side effects people have besides Neutrophilia? *

Blood Creatine Phosphokinase Increased: 9 people, 34.62%
Fatigue (feeling of tiredness): 7 people, 26.92%
Acidosis (build-up of carbon dioxide in the blood): 7 people, 26.92%
Blood Urea Increased: 7 people, 26.92%
Subarachnoid Haemorrhage (blood leaks into the space between two membranes that surround the brain): 7 people, 26.92%
Culture Urine Positive: 7 people, 26.92%
Fall: 7 people, 26.92%
Diabetes Mellitus Aggravated (serious diabetes): 6 people, 23.08%
Weakness: 6 people, 23.08%
Thrombocytopenia (decrease of platelets in blood): 6 people, 23.08%

What are the existing conditions these people have? *

Irritability: 7 people, 26.92%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 4 people, 15.38%
Constipation: 4 people, 15.38%
Pain: 3 people, 11.54%
Oral Pain: 3 people, 11.54%
Nausea (feeling of having an urge to vomit): 3 people, 11.54%
Dyspnea (difficult or laboured breathing): 3 people, 11.54%
Schizophrenia (a mental disorder characterized by a breakdown of thought processes): 2 people, 7.69%
Schizoaffective Disorder (a mental disorder characterized by disordered thought): 2 people, 7.69%
Pneumonia: 1 person, 3.85%

* Approximation only. Some reports may have incomplete information.

Do you take Synthroid and have Neutrophilia?

- Check whether Neutrophilia 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)

Neutrophilia treatments and more:

Neutrophilia (6,291 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 Neutrophilia:

Neutrophilia (333 drugs)

Browse all the conditions that are associated with Neutrophilia:

Neutrophilia (481 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.