Quote Originally Posted by Kelly
120/80 is "normal"

Mine is usually a little low. It has been as low as 40 for the bottom number.
a diastolic number of 40 is a sign of hypotension. It could cause you to pass out, especially if you have ever had any symptoms of orthostatic hypotension, which means your bp drops more when you stand or sit up. Are you anemic? you might have hypovolemia (blood volume deficit). Has your MD ever said anything about it?