- An ALS clinical trial is a research study testing whether a treatment is safe and works; taking part is voluntary and is not guaranteed treatment.
- Trials run in phases 1 through 4, testing safety, effectiveness, comparison with standard care, and long-term monitoring after approval.
- You can search ClinicalTrials.gov, the NEALS trial database, and join the National ALS Registry to be notified about studies you may qualify for.
- Informed consent means the team explains risks and benefits before you agree, and you may withdraw at any time without losing your regular care.
- Never stop an ALS medication or supportive treatment to qualify for a study without your neurologist's guidance.
- Because ALS progresses, timing matters; ask your ALS care team early about trials and about expanded access if you are not eligible for one.
A clinical trial for ALS (amyotrophic lateral sclerosis) is a research study that tests whether a treatment — usually an investigational drug, but also devices or supportive approaches — is safe and helps people living with ALS. Taking part is voluntary, it is not the same as receiving proven care, and you can leave at any time. This guide explains what ALS trials are, how the phases work, where to search, and how to weigh the decision with your ALS care team. It is educational and does not replace medical advice.
ALS is a serious, progressive neurological disease, and research participation is a meaningful, personal choice that many people and families consider. Deciding to explore a trial is reasonable and informed; deciding not to is equally valid. Either way, clear information helps.
What a clinical trial actually is
As MedlinePlus and the NIH describe it, a clinical trial is a research study that tests how well a new medical approach works in people, following a written plan called a protocol. An Institutional Review Board (IRB) — clinicians, statisticians, and community members — reviews and monitors each study to protect participants and confirm that the possible benefits justify the risks. Many trials compare a new treatment against standard care or a placebo, and often use randomization, so a computer, not the researcher, assigns your group. For a fuller primer, see how clinical trials work.
The four phases, briefly
Trials run in phases, each answering a different question. This framework comes from the NIH.
| Phase | Main question | Typical size |
|---|---|---|
| Phase 1 | Is it safe? What dose is tolerable? | Small (roughly 20–80 people) |
| Phase 2 | Does it work, and is it still safe? | Larger (roughly 100–300) |
| Phase 3 | How does it compare with standard treatment? | Large (hundreds to thousands) |
| Phase 4 | How does it perform long-term after approval? | Ongoing, post-approval |
ALS research includes drug trials across these phases as well as observational studies that track the disease over time. Because ALS progresses, timing and eligibility windows can matter, so it is worth asking your care team early.
How to search for an ALS trial
The main public database is ClinicalTrials.gov, run by the U.S. National Library of Medicine. Each study record shows recruitment status, eligibility criteria, locations, and contacts, plus a unique NCT number. To search:
- Enter “ALS” or “amyotrophic lateral sclerosis” and your city or state.
- Filter by recruitment status to see studies actively enrolling.
- Read the eligibility criteria, which often depend on how recently you were diagnosed and your current function.
- Use the listed contact to reach the study team with your questions.
ALS also has dedicated resources. The ALS Association partners with the Northeast ALS Consortium (NEALS), which maintains a searchable trial database and offers trial liaisons who can answer questions and help with finding and enrolling in studies. You can also join the National ALS Registry (run by the CDC’s ATSDR), which includes a research notification system that can alert you to trials and studies you may qualify for. The NINDS additionally funds research on expanded access to investigational drugs for people who are not eligible for a trial. Your ALS clinic is often the best first contact.
Informed consent and your right to withdraw
Before enrolling, the study team must take you through informed consent: a process in which they explain the purpose, procedures, possible risks and benefits, and your alternatives. Take the form home, ask questions, and involve your neurologist or a family member. Consent is not a lock-in — you have the right to withdraw at any time, for any reason, without penalty and without losing the standard care you would otherwise receive. To learn more, see informed consent in clinical trials.
Research is not guaranteed treatment
A trial may test something that turns out not to help, and you may be assigned to a comparison or placebo group. Enrolling does not guarantee benefit, and it should not replace the proven, supportive care that ALS multidisciplinary clinics provide. Treat a trial as one option to weigh alongside your care team’s recommendations, with realistic expectations about what any single study can offer.
Never stop your current treatment on your own
Do not stop an ALS medication or a supportive treatment to qualify for a study on your own. If a trial requires a change to your medications, your neurologist and the study team should plan it together. The safe order is: explore eligibility first, change nothing until a clinician guides it.
Frequently asked questions
Is it safe to join an ALS clinical trial?
Trials follow a protocol reviewed and monitored by an Institutional Review Board to protect participants, but no research is risk-free. The consent process explains the specific risks so you can decide. Review any trial with your ALS care team first.
Will I get a placebo instead of the drug?
Some ALS trials include a placebo or a comparison group, and assignment is often random, though designs vary. The consent form states whether a placebo is possible — ask the study team directly before agreeing.
What is NEALS and how does it help?
The Northeast ALS Consortium (NEALS), a partner of the ALS Association, maintains a searchable ALS trial database and offers trial liaisons who answer questions and help people find and enroll in studies.
What if I am not eligible for any trial?
Ask your care team about expanded access to investigational drugs, which the NINDS funds research on for people who cannot join a trial, and about observational studies and the National ALS Registry, which can notify you about future opportunities.
Can I leave the study after I start?
Yes. You can withdraw at any time, for any reason, without penalty and without losing your usual medical care. Tell the study team so any study treatment can be stopped safely.
Do I have to stop my ALS medication to qualify?
Not on your own. Never stop or change an ALS medication to join a study without your neurologist’s guidance. Let your clinician and the study team coordinate any change.
This article is general education and is not medical advice. Talk to a qualified clinician about your situation.
Sources
- ClinicalTrials.gov — U.S. National Library of Medicine / National Institutes of Health (searching studies, phases, NCT numbers, eligibility)
- National Institutes of Health — “NIH Clinical Research Trials and You” (trial phases; informed consent)
- National Institute of Neurological Disorders and Stroke (NINDS) — ALS information; expanded access research
- The ALS Association — clinical trials for patients; partnership with the Northeast ALS Consortium (NEALS)
- National ALS Registry — CDC/ATSDR research notification mechanism
- MedlinePlus, U.S. National Library of Medicine — Clinical Trials overview (protocol, IRB oversight)
Related reading: start with how clinical trials work, understand informed consent in clinical trials, compare clinical trials for other neurological conditions, and browse the full Medical Conditions guide.