Extavia and Appendicitis - a phase IV clinical study of FDA data

Summary:

Appendicitis is reported as a side effect among people who take Extavia (interferon beta-1b), especially for people who are female, 30-39 old, have been taking the drug for < 1 month and have Chronic fatigue syndrome.

The phase IV clinical study analyzes which people have Appendicitis when taking Extavia. It is created by eHealthMe based on reports of 4,879 people who have side effects when taking Extavia from the FDA, and is updated regularly.

What is Extavia?

Extavia has active ingredients of interferon beta-1b. It is often used in multiple sclerosis. eHealthMe is studying from 4,888 Extavia users. Check the latest studies of Extavia.

What is Appendicitis?

Appendicitis (inflammation of the appendix) is found to be associated with 853 drugs and 884 conditions by eHealthMe. Check the latest studies of Appendicitis.

On Feb, 05, 2026

4,879 people reported to have side effects when taking Extavia.
Among them, 10 people (0.2%) have Appendicitis.

Among these 10 people:

How long have people been on Extavia when they have Appendicitis? *

What is the gender of people who have Appendicitis when taking Extavia? *

female: 80 %
male: 20 %

What is the age of people who have Appendicitis when taking Extavia? *

What are other side effects people have besides Appendicitis? *

Abdominal Pain: 4 people, 40.00%
Fever: 4 people, 40.00%
Malaise (a feeling of general discomfort or uneasiness): 4 people, 40.00%
Injection Site Erythema (redness at injection site): 3 people, 30.00%
Injection Site Pain: 3 people, 30.00%
Nasopharyngitis (inflammation of the nasopharynx): 2 people, 20.00%
Constipation: 2 people, 20.00%
Hot Flush (sudden feelings of heat): 2 people, 20.00%
Influenza Like Illness: 2 people, 20.00%
Urine Ketone Body Present: 2 people, 20.00%

What are the existing conditions these people have? *

Thrombosis (formation of a blood clot inside a blood vessel): 1 person, 10.00%
Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 1 person, 10.00%
Chronic Fatigue Syndrome (disorder that causes extreme fatigue): 1 person, 10.00%

* Approximation only. Some reports may have incomplete information.

Do you take Extavia and have Appendicitis?

- Check whether Appendicitis 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 Extavia:

Extavia (4,888 reports)

Appendicitis treatments and more:

Appendicitis (11,953 reports)

Browse all side effects of Extavia:

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 Appendicitis:

Appendicitis (853 drugs)

Browse all the conditions that are associated with Appendicitis:

Appendicitis (884 conditions)

Drugs similar to Extavia and Appendicitis :

How the study uses the data?

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