I have tried the mestinon 3 different times. I'm me to MG; diagnosed in May of this year. I am no longer taking it. I felt weird, so I took my BP. It was 179/80 which is unusual for me. Even weirder, my heart rate was 85bpm while just laying on the couch watching TV. These aren't expected reactions either, but like you, I react to most medications. I hope they find answers for you quickly.

I've been on it since 1987. I don't remember ever having it cause my BP to drop but I did have other side effects, particularly diarrhea and stomach issues but it's not as bad as it used to be back then. Hope the doctor can figure out what's causing your low BP.

Hope you get answers soon, Diane!

I really don’t have any side effects from the Mestinon on a daily basis.
Occasionally I do get diarrhea that lasts for a day, but then goes away. Nothing really serious.
I have been nesting since I was diagnosed in 2009. I have been in remission since 2009.
I take one day at a time and make it count.
Good luck and God Bless

No I have been on it for a very long time it shouldn't be a side effect but check with your Doctor or Pharmacist to see if another medication you are taking could be causing the problem