This is actually more about the Gabapentin (sp) that your son is on. Please do some research and talk to your sons Nuero about this drug. It can be very dangerous for myasthenics and can actually cause mg to become present where it had otherwise been dormant. I was on it for a few months to help control my pain, and quickly went into a downward spiral.

I also suffer from memory lapses and loss of communication.
Hope this finds you all strong and well
Jess