I was feeling off balance, nauseated, w/ some chest pains. Doc thought I was dehydrated, n had me drink a lot of gaterade. Checked my blood pressure at laying, sitting, standing, & noticed my pulse was high n kept going up to 150 w/ standing. My blood pressure runs around 96 over 60 to 120 over 80, and dropped to where they almost lost me during hysterectomy surgery. Cardiologist prescribed Atenol 25 mg to take at bedtime. Is this safe? They r not running any other tests (had me walk on treadmilll with ekg connected. My dad has a pacer, my brother had valve replaced due to mitral-valve prolapse. Last July I had felt light headed & gotten diarhea/threw up, ambulance came & my blood pressure dropped & I had fainted, first the said I was dehydrated & then they said I had a kidney infection caused from Ecoli. Please not that I have a cyst on my one ovary that I have left, & too many cysts too count-I believe on my liver (but nothing huge). I also have a kidney stone lodged in my left side that has been there for a long time, but they say is fine, as it is not moving. I was taking Psyllium Hulls every day since I got sick last year until very recently, to try to stay regular ( I had been prescribed Imodium AD a for months last year before & after they said that IO had Ecoli, & after had to go to hospital a lot to get IV fluids as I could not stay hidrated no matter how much I drank. My question mainly is, will taking Atenol make me paass out or lose my balance more? & is it safe for me? Is there any over the counter things I could do?