<font color=BLUE>Hello, and I am pleased to help, use of my answers are for educational purposes only.<font>
What is happening?
Is it possible for her blood pressure to change so radically in the course of a day?
She could have a change this DRASTICALLY if the blood pressure is working, but decreasing the pressure this quickly when her blood pressure has been elevated for awhile - she probably should be closer to 130/80 for her to feel better.
Should I take her to the emergency room to have her checked out?
Is she is not feeling well, and her blood pressure is making her feel weak and having other symptoms - then I would recommend that she does get checked out in the emergency room
I hope this helps, If you have additional questions, please ask, and Please click on ACCEPT as this would be appreciated, thank you.
Is it possible that her blood pressure can change so dramatically in two days?
If the blood pressure pills she was given was too much for her, yes, it can change that drastically.