Annie is right about the Benadryl, I have to take it with everything, even the mestinon.

I am like you in that I am super sensitive to all medications. But you do need to talk to your Dr. asap about just how bad a reaction you are having to the mestinon. I know I used to react that way but I guess after taking it awhile my body became adjusted to it and I don't react like that anymore, plus I do take the benadryl and I really think that helps.