Yes it is. After wearing a heart monitor for a month, he said I did not have one single pac the entire time, although I did have many pvc's. He doesn't think it's necessary for me to continue taking it. I am supposed to have an echo done the end of the month. He said he wanted me to be off it for at least two weeks prior. Evidently my last stress test showed something to do with reduced ejection fraction. Also he said my pulse rate is way too low. Thinks it's because of the metoprolol.