Multiple Sclerosis: BIIB091 Treatment Study

We are studying the safety of BIIB091 alone and with Diroximel Fumarate in adults with relapsing forms of multiple sclerosis. The goal is to see how these treatments affect brain inflammation.

What diseases are being studied?

Health conditions and diseases that the clinical trial is designed to study and treat.

Who can participate in the clinical trial?

These questions help us understand your situation so we can let the trial team know whether you might be a potential match. This is not a medical evaluation and is not part of the official screening, the study doctor will make the final decision..

What medicines are being studied?

Medicines that are officially approved for use in the European Union and considered safe by EMA. These medicines are already on the market and may be tested for new conditions or populations.

Clariscan
Clariscan is a contrast agent used during MRI scans to help doctors obtain clearer images of organs and tissues.
Vumerity
Vumerity is a medicine used to treat relapsing forms of multiple sclerosis by reducing flare-ups and slowing disease progression.

What active substances are being studied?

Active substances that are officially approved for use in the European Union and considered safe by EMA. These substances are already on the market and may be tested for new conditions or populations.

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Diroximel Fumarate
Diroximel fumarate is a substance used to reduce relapses in people with relapsing forms of multiple sclerosis.
Gadoteric Acid
Gadoteric acid is a contrast agent used to improve visibility of tissues and blood vessels during MRI scans.

What experimental substances are being tested?

Experimental substances that are being investigated in this clinical trial. These are not yet approved for general use.

Solu-Moderín
BIIB091
Triazole

What similar medicines might you know?

Don't worry if you don't know the medicines tested in the trial. There is a chance you have heard about the similar medicines. Check the list below to see if you are familiar with any of them.

Acide Gadoterique Guerbet
Artirem
Claricyclic

Where is the clinical trial being conducted?

Locations and medical facilities where this clinical trial is currently recruiting or conducting research. Select the locations where you would like to participate.

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Multiprofile Hospital For Active Treatment Avis Medika OOD
Department of Neurology
Pleven, Bulgaria
University Multiprofile Hospital For Active Treatment Dr. Georgi Stranski EAD
Neurology Clinic
Pleven, Bulgaria
University Multiprofile Hospital For Active Treatment Saint Georgi EAD
Clinic of Neurology Diseases
Plovdiv, Bulgaria

Sponsor: Biogen Idec Research Limited
Last updated: Nov 26, 2025

Disclaimer: Parts of this content have been automatically extracted from the EU Clinical Trials registry. While we strive for accuracy, please always contact the trial site or sponsor directly for correct and official information before making any decisions about participation. View on EU Clinical Trials.