Thank you both for your responses. Let me ask this if I may: I have high blood pressure. Prior to getting it under control, I had vertigo very badly. Ever since last night, its back after not experiencing it for six months. It looks like this is evolving into two questions...

Does Mestinon affect blood pressure?
Does Mestinon cause vertigo?

Too, I've had a number of very severe stabbing pains in my head since last evening which have come with the episodes of vertigo. I don't always get the stabbing pain when I experience vertigo, but if the stabbing pain comes, I know my world is about to spin.

Anywho, I've taken one complete day of 60mg now and no relief <insert sad face here>.