Yeah, I had not even heard of it. I guess it's primary purpose is to treat high blood pressure. I didn't want to tweak any meds or start taking anything new so close to surgery, but I was really left with no choice.

I had to call the people at the hospital to let them know I'm taking a new med and left a message. Because it effects blood pressure, I'm sure I'll be given some kind of instructions such as withholding it prior to surgery.