My b/p sitting for the last 20 yrs can run as high as 220/115 but fairly common to run 175/100 but upon standing can drop 100 points but usually drops about 50 to 75 points. I just was RX a medicine with a half life of only 3 hrs. to lower pressure, I have had it now about 2 wks but afraid to take it, thinking my pressure may go too low. Heart rate is usually 66 to 69 regardless of pressure. Quite frankly I do not know what to do, since I have had it for over 20 yrs.