Inflectra and Synthroid drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Inflectra (infliximab-dyyb) and Synthroid (levothyroxine sodium). Common drug interactions include neutropenia among females and blood pressure fluctuation among males.

The phase IV clinical study analyzes what interactions people have when they take Inflectra and Synthroid. It is created by eHealthMe based on reports of 1,335 people who take the same drugs from the FDA, and is updated regularly.

What is Inflectra?

Inflectra has active ingredients of infliximab-dyyb. eHealthMe is studying from 52,370 Inflectra users. Check the latest studies of Inflectra.

What is Synthroid?

Synthroid has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. eHealthMe is studying from 249,194 Synthroid users. Check the latest studies of Synthroid.



On Apr, 21, 2026

1,335 people who take Inflectra and Synthroid together, and have interactions are studied.

Inflectra and Synthroid drug interactions.

What are the common drug interactions of Inflectra and Synthroid, by gender? *

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What are the common drug interactions of Inflectra and Synthroid, by age (0-1 to 60+)? *

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What are the existing conditions these people have? *

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* Approximation only. Some reports may have incomplete information.

Do you take Inflectra and Synthroid?

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Related studies:

Effectiveness of, side effects of, and alternative drugs to the 2 drugs:

Browse all drug interactions of Inflectra and Synthroid:

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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+

Browse all side effects of Inflectra:

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 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 interactions between Inflectra and drugs from A to Z:

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 interactions between Synthroid and drugs from A to Z:

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

How the study uses the data?

The study uses data from the FDA. It is based on infliximab-dyyb and levothyroxine sodium (the active ingredients of Inflectra and Synthroid, respectively), and Inflectra and Synthroid (the brand names). 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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