Avonex and Streptococcal bacteraemia - a phase IV clinical study of FDA data

Summary:

Streptococcal bacteraemia is reported as a side effect among people who take Avonex (interferon beta 1a), especially for people who are female, 60+ old, have been taking the drug for 10+ years also take Zanaflex, and have Depression.

The phase IV clinical study analyzes which people have Streptococcal bacteraemia when taking Avonex. It is created by eHealthMe based on reports of 198,141 people who have side effects when taking Avonex from the FDA, and is updated regularly.

What is Avonex?

Avonex has active ingredients of interferon beta 1a. It is often used in multiple sclerosis. eHealthMe is studying from 198,544 Avonex users. Check the latest studies of Avonex.

What is Streptococcal bacteraemia?

Streptococcal bacteraemia (a bacterial infection of blood) is found to be associated with 238 drugs and 316 conditions by eHealthMe. Check the latest studies of Streptococcal bacteraemia.

On Jul, 31, 2026

198,141 people reported to have side effects when taking Avonex.
Among them, 12 people (0.01%) have Streptococcal bacteraemia.

Could Avonex cause Streptococcal bacteraemia?

Among these 12 people:

How long have people been on Avonex when they have Streptococcal bacteraemia? *

What is the gender of people who have Streptococcal bacteraemia when taking Avonex? *

female: 91.67 %
male: 8.33 %

What is the age of people who have Streptococcal bacteraemia when taking Avonex? *

What are other drugs people take besides Avonex? *

What are other side effects people have besides Streptococcal bacteraemia? *

Pneumonia: 4 people, 33.33%
Memory Loss: 4 people, 33.33%
Confusional State: 3 people, 25.00%
Viral Infection: 3 people, 25.00%
Small Intestinal Obstruction (blockage in small intestine): 3 people, 25.00%
Impaired Healing: 3 people, 25.00%
Depression: 3 people, 25.00%
Pressure Ulcer: 3 people, 25.00%
Fatigue (feeling of tiredness): 2 people, 16.67%
Excoriation (to tear or wear off the skin of): 2 people, 16.67%

What are the existing conditions these people have? *

Depression: 2 people, 16.67%
Fever: 1 person, 8.33%
Abdominal Discomfort: 1 person, 8.33%

* Approximation only. Some reports may have incomplete information.

Do you take Avonex and have Streptococcal bacteraemia?

- Check whether Streptococcal bacteraemia 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 Avonex:

Avonex (198,544 reports)

Browse all side effects of Avonex:

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 Streptococcal bacteraemia:

Streptococcal bacteraemia (238 drugs)

Browse all the conditions that are associated with Streptococcal bacteraemia:

Streptococcal bacteraemia (316 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on interferon beta 1a (the active ingredients of Avonex) and Avonex (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.