One thing I do for quick absorption of mestinon is chew it up and hold it under my tongue. I have heard it produces less stomach upset doing it this way too. After it of it has been swallowed, drink a bit of water. It is not lovely to have to taste but it is manageable.

UC Davis is THE place for a muscle biopsy so rest assured you are going to the right place for your son.

Good luck and best wishes, debra