Avonex and Vaginal bleeding between periods - a phase IV clinical study of FDA data

Summary:

Vaginal bleeding between periods is reported as a side effect among people who take Avonex (interferon beta 1a), especially for people who are 40-49 old, have been taking the drug for 1 - 6 months also take Neurontin, and have Birth control.

The phase IV clinical study analyzes which people have Vaginal bleeding between periods 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 Vaginal bleeding between periods?

Vaginal bleeding between periods is found to be associated with 573 drugs and 1,470 conditions by eHealthMe. Check the latest studies of Vaginal bleeding between periods.

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

198,141 people reported to have side effects when taking Avonex.
Among them, 54 people (0.03%) have Vaginal bleeding between periods.

Could Avonex cause Vaginal bleeding between periods?

Among these 54 people:

How long have people been on Avonex when they have Vaginal bleeding between periods? *

What is the age of people who have Vaginal bleeding between periods when taking Avonex? *

What are other drugs people take besides Avonex? *

What are other side effects people have besides Vaginal bleeding between periods? *

Ovarian Cysts (fluid filled sacs of the ovary): 10 people, 18.52%
Amenorrhea (absence of a menstrual period in a woman of reproductive age): 9 people, 16.67%
Headache (pain in head): 9 people, 16.67%
Influenza Like Illness: 7 people, 12.96%
Dysmenorrhea (painful menstruation): 7 people, 12.96%
Weight Increased: 6 people, 11.11%
Heavy Or Prolong Menstrual Bleeding: 6 people, 11.11%
Fall: 5 people, 9.26%
Asthma: 4 people, 7.41%
Fatigue (feeling of tiredness): 4 people, 7.41%

What are the existing conditions these people have? *

Birth Control: 7 people, 12.96%
Gait Disturbance: 2 people, 3.70%
Spinal Pain (pain in spine): 1 person, 1.85%
Postmenopause: 1 person, 1.85%
Movement - Uncoordinated: 1 person, 1.85%
Menstrual Discomfort: 1 person, 1.85%
Joint Pain: 1 person, 1.85%
Influenza Like Illness: 1 person, 1.85%
High Blood Pressure: 1 person, 1.85%
Dysmenorrhea (painful menstruation): 1 person, 1.85%

* Approximation only. Some reports may have incomplete information.

Do you take Avonex and have Vaginal bleeding between periods?

- Check whether Vaginal bleeding between periods 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 Vaginal bleeding between periods:

Vaginal bleeding between periods (573 drugs)

Browse all the conditions that are associated with Vaginal bleeding between periods:

Vaginal bleeding between periods (1,470 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.