I actually haven't even heard of that drug, but I tend to check all my meds for interactions before I take them...and you can actually input all the meds together and see if they interact...but please be careful taking so much mestinon....even if it helps ur Myasthenia, it can cause the same symptoms as your MG but send you into a medicine induced crises....Mestinon can only do SOOO much, and if you are still very weak depending on the level of weakness, I would go to the hospital at least they can watch you there to make sure you aren't headed into a crisis....I hope this finds you feeling much better.
Sending Prayers
Jessica