I was on Ativan and Serzone (still am) when I had my hysterectomy 3 years ago. Just let the doctor and anesthesiologist know what you are taking. I was so scared, but the anesthesiologist gave me something to relax me in the waiting area and next thing I knew it was over and I was back in my room.
God bless you! We're here for you. Please let me know if I can do anything for you.