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New study tracks safety of ALS drug tofersen over 7 years

NCT ID NCT07259980

Knowledge-focused Sponsor: Biogen Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at the long-term safety of the drug tofersen (Qalsody®) in people with a rare, inherited form of ALS called SOD1-ALS. Researchers will collect health information from about 125 participants in Europe and the US over at least 7 years. The main goal is to see what side effects occur, including serious ones, and to understand the participants' health over time. No new treatments are given—this is an observational study that follows patients receiving routine care.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 125 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jan 2026

Expected to finish

Dec 2033

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Participants with SOD1-ALS enrolled in TRICALS network's Precision-ALS programme with data from participating clinical centers across multiple European countries or at ALS/MND NHC with data from participating clinical centers in the United States (tofersen users and tofersen non-users).

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Key Inclusion Criteria: * Participants with an ALS diagnosis and a confirmed SOD1 mutation from contributing registry networks will be considered for inclusion in the study. Key Exclusion Criteria: * Data collected while a person with SOD1-ALS is participating in an interventional clinical trial (with tofersen or any other investigational medicinal product) will be excluded. NOTE: Other protocol- defined Inclusion/Exclusion criteria may apply.

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Conditions

The condition(s) this trial relates to.

amyotrophic lateral sclerosis amyotrophic lateral sclerosis type 1

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Amyotrophic lateral sclerosis

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Mass General Hospital -MGH

    RECRUITING

    Boston, Massachusetts, 02114, United States

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