Hi Sandy,
3 years ago, I flew from France to Canada while on Pred, Mestinon and Cellcept for a one-month stay at our sonīs home in Montreal.
4 years ago, I also took a one week vacation tour in Sicily from France which included a flight.
I have a generalized myastenia since 2007 but without any peculiarity except a relapse 3 months after the Sicily trip due to a pneumonia shot.
I never experienced anything abnormal during these 2 trips and we are booked for a Mediterranean cruise end of June for our 50 year wedding anniversary...
Each time, I took the following precautions:
-carry ample supply of prescribed drugs,
-bring a copy of each prescription,
-have some litterature and references on myastenia with me
in your case, see for example
http://www.orpha.net/consor/www/cgi-...raphicType=Cnt
With a little browsing in this site, you can have adresses of reference centers in Italy and patient organization plus print some documentation in Italian.
-be covered by a comprehensive insurance which covers pre-existing illness.
This is my personal experience which is different from those reported above...
Should you go, have a good trip!
Maurice.