It's really impossible to say why one reading would have been lower than your norm. There could be LOTS of different reasons, none of them which are a big concern. My guess would be that if you've been on the Xanax for a while, which you have, it's probably not related to that at all. Are you taking any other medications? Do you take any BP/heart medications? Did you have any symptoms at the time you got the lower reading? Where was your BP taken and why?
I would mention it to your doctor, who may or may not recommend keeping track of your BP for a while to see if that one reading was a fluke, or if you're consistently running lower than normal.
Keep us updated!
I don't take any other medications. I have no other health issue so far but my wife has hypertension. She is on medication and her BP is controlled. We have just bought a BP monitor for her. My BP reading has been normal. I'm asking this question because I thought that the last reading might be too low. I read that some medications can cause one's BP to be higher and lower. I feel giddy sometimes.
Thank you!