Overview
Myasthenia gravis blocks signals between nerves and muscles.
Weakness gets worse with activity and better with rest.
Symptoms
Common signs:
- Droopy eyelids or double vision
- Double vision or droopy eyelids that get worse when tired
Less common
- Weak arms or legs
- Trouble swallowing
- Weak neck
When to get medical care
Call 911Trouble breathing or swallowing: call 911.
Get care todayWorse weakness.
See a doctor soonNew weakness.
Causes
Immune system.
Does it spread or run in families?
- It isn't contagious. You can't catch it from someone else.
Who is more likely to get it
- Women under 40
- Men over 60
Diagnosis
Blood tests.
Tests
Tests, if needed:
- Antibody tests:
- EMG:
Treatment
Pace activities.
Self-care
- Rest between tasks
- Rest between tasks
- Plan activities for the morning
Medicines
Medicines that may help:
| Medicine | Helps with | Good to know |
|---|---|---|
| Pyridostigmine | Weakness | |
| Immune treatments | Control |
OwieClear doesn't give doses: follow the label or your healthcare professional. Medicine names here are examples, not a full list.
Which doctor treats this
- Start with your primary care provider (family doctor or internist).
- They may send you to a neurologist (brain and nerve doctor).
Living with it
Support groups and helplines
- Muscular Dystrophy Association (MDA): Care centers and support for neuromuscular diseases.
- Genetic and Rare Diseases Information Center (GARD): Free NIH information on rare diseases, including where to find experts and patient groups.
- National Organization for Rare Disorders (NORD): Patient groups, help finding care, and aid programs for rare diseases.
Children, pregnancy, and older adults
- Women under 40 and men over 60: Most common.
Pregnancy and breastfeeding
- If you're pregnant or planning to be, tell your prenatal provider about this condition.
- Don't start or stop any medicine on your own. Some are safe in pregnancy and some need to be changed.
- Ask before taking any pain reliever. The FDA advises avoiding ibuprofen and naproxen after 20 weeks unless your doctor says to.
- Breastfeeding: Most medicines are fine, but ask. The NIH LactMed database lists what's known about each one.
Outlook
Well controlled for most.
Getting ready for your visit
Bring a list of your symptoms and medicines.
What to bring
- A list of your medicines and supplements
- Notes on when symptoms started and what makes them better or worse
Questions to ask
- Which medicines should I avoid?
Research studies
Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.
Sources
Last updated 2026-11-12.