But the only diseases that cause FATIGABLE weakness are MG, LEMS, or a CMS.

Have you been to a neuro-ophthalmologist? They can do specific tests to check for fatigable muscle weakness.

Has any neuro seen fatigable weakness on a clinical exam?

Have you been to a pulmonologist to see if you have fatigable breathing issues?

Before you slam down any heavy duty drugs, make sure what is going on first. After you take immunosuppressants, it's near to impossible to determine what is going on!

I hope you can figure all this out for sure and then get more help!

Annie