I'm taking one 60 mg tab per day for three days, then two per day for three days, then 3 per day after that. Trying it out for a few weeks to see if it improves my DV, Ptosis, leg and trunk weakness, etc. I am negative for all the antibodies and nine (yes, 9) different neurologists over the last three years have tested me for everything from ALS to ms, etc and they all stated I could not have MG because the antibody tests were normal. Now I saw a Neuro opthalmologist who said that is nonsense, you can have all normal testing and still have MG so she put my on mestinon to see. Today is day two, and I think it helps a lot, although see,s to wear off in about 3 hours.