My doctor told me that the Metoprolol ER shouldn't be cut in half even though it had the line in it to do so. When I checked with a friend of mine who is a nurse she told me the same thing. She was the one who told me instead of cutting them in half to start taking them every other day for a week then every third day for another week and then stop. But I decided on my own after the first week of every other day to just stop on my own.
I was put on Metoprolol after the heart attack. I was on a ventilator for about the first 10 days in the hospital and was given everything through an IV. After they removed the tube from the ventilator and they deemed that I could swallow I started taking it in pill form.