Treatments
Disease-Modifying Therapy (DMT)
What it is
Disease-modifying therapies are medications designed to change the long-term course of MS. They work by calming the immune system so it causes less damage to nerves over time. DMTs come as pills, injections, and infusions, and there are many different options.
Why it matters for you
Choosing a DMT is one of the biggest conversations you will have with your care team. Knowing what the umbrella term means makes it easier to compare options without getting lost in brand names.
Questions to ask your doctor
- Why are you recommending this specific medication?
- What are the most common side effects?
- How long before we know if it is working?
- What monitoring or bloodwork is required?
- What happens if I miss a dose?
Frequently asked
Will I have to take a DMT for the rest of my life?
DMTs are commonly used long-term, but the specific medication can change over time. Neurologists reassess based on MS activity, MRI changes, side effects, and other health factors.
How soon will I know if a DMT is working?
It usually takes at least six months to a year of scans and exams before your team can tell whether a DMT is effectively reducing activity.
DMT change notes in MS Buddy
Free in the MS Buddy app.
Related terms
Find MS treatment centers near you
MS care is specialized — the center you choose shapes access to DMTs, infusions, and clinical trials. Pick your state to see centers in your area.
Check out the MS Buddy App
It's free, no ads. How? It's made and supported by MS patients who get their ideas from other MS patients.
Reviewed by the MS Buddy editorial team · Last updated April 16, 2026
Not medical advice. Always consult your care team.
Not medical advice. Always consult your care team.