How To Wean Off Metoprol 25mg Tablet?

i have taken metoprol 25mg for 6 years. I was first given it for a enlarged heart muscle. after 1 year the muscle was normal, but i continued taking it for heart palpatation. I have low blood pressure. my heart is good. I'm a female 60 years old. I would like to wean myself off of it. I have moved from the state that the cardiologist first prescribed & my drs here have continued to fill Rx. I just had an ekg & stress test & it was all good. how do I wean off of it?