Avonex and Facial paresis - a phase IV clinical study of FDA data

Summary:

Facial paresis is reported as a side effect among people who take Avonex (interferon beta 1a), especially for people who are female, 50-59 old, have been taking the drug for 5 - 10 years also take Tysabri, and have High blood pressure.

The phase IV clinical study analyzes which people have Facial paresis 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 Facial paresis?

Facial paresis (weakness in facial muscle movement) is found to be associated with 339 drugs and 937 conditions by eHealthMe. Check the latest studies of Facial paresis.

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, 03, 2026

198,141 people reported to have side effects when taking Avonex.
Among them, 26 people (0.01%) have Facial paresis.

Among these 26 people:

How long have people been on Avonex when they have Facial paresis? *

What is the gender of people who have Facial paresis when taking Avonex? *

female: 80.77 %
male: 19.23 %

What is the age of people who have Facial paresis when taking Avonex? *

What are other drugs people take besides Avonex? *

What are other side effects people have besides Facial paresis? *

Headache (pain in head): 6 people, 23.08%
Hypoaesthesia (reduced sense of touch or sensation): 5 people, 19.23%
Speech Impairment (Adult) (inability to speak (adult)): 5 people, 19.23%
Weakness: 5 people, 19.23%
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect): 3 people, 11.54%
Pupillary Reflex Impaired: 3 people, 11.54%
Fever: 3 people, 11.54%
Fatigue (feeling of tiredness): 3 people, 11.54%
Nausea (feeling of having an urge to vomit): 3 people, 11.54%
Optic Neuritis (optic nerve inflammation): 3 people, 11.54%

What are the existing conditions these people have? *

Depression: 2 people, 7.69%
High Blood Pressure: 2 people, 7.69%
Seizures (abnormal excessive or synchronous neuronal activity in the brain): 1 person, 3.85%
Asthma: 1 person, 3.85%
Atrophic Vulvovaginitis (inflammation of the vulva): 1 person, 3.85%
Birth Control: 1 person, 3.85%
Chronic Lymphocytic Leukaemia (cancer in which the bone marrow makes too many lymphocytes (a type of white blood cell)): 1 person, 3.85%
Convulsion (muscles contract and relax rapidly and repeatedly, resulting in an uncontrolled shaking of the body): 1 person, 3.85%
Cough: 1 person, 3.85%
Deep Venous Thrombosis (blood clot in a major vein that usually develops in the legs and/or pelvis): 1 person, 3.85%

* Approximation only. Some reports may have incomplete information.

Do you take Avonex and have Facial paresis?

- Check whether Facial paresis 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)

Facial paresis treatments and more:

Facial paresis (4,285 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 Facial paresis:

Facial paresis (339 drugs)

Browse all the conditions that are associated with Facial paresis:

Facial paresis (937 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.