It could be the diagnosis isn’t correct or else you would also be taking Mestinon (pyridostigmine bromide) to help with your symptoms. Mestinon is typically the first drug prescribed for MG. For me Mestinon alone didn’t help at all even at high doses with my droopy left eyelid and double vision until I was started on Prednisone. When I reached the 40mg Prednisone level the double vision started to go away and is currently gone while now I am at the 20mg level and taking Mestinon. Have you had a positive diagnosis of your MG?