I was just prescribed Erythromycin for a pertussis infection and after 4 days feel worse than I started. I kept feeling very tired, my ptosis was very bad yesterday, and my arms and legs feel kind of tingly-heavy. I had no idea that all that was caused by the antibiotic until I forgot to take it this morning. Felt fine, until I remembered to take it and within an hour bam, felt bad again. Now I know what it feels like to have full blown MG, instead of only ocular symptoms. I looked it up online to find out that it does interact with MG even though I was told that it wouldn't by the dr.

I have a call into them to hopefully get something else, but I am worried they may not be able to offer an alternative that works either because the medicines used to treat it are also interactive with MG. My neuro is out until Tuesday, I already tried calling there to see if she would recommend a certain antibiotic to treat it.