I asked my neurologist about the use of lidocaine or novacaine for dental work or stitches. Her response was that at the doses needed for a local anesthetic it would not be an issue at all except for some localized affects which are to be expected. When it becomes a problem is when it is used more systemically in IV form such as when someone is having a heart attack; in that case the dose is about 40 times higher and does become a problem for those with MG.

Joe