atrial fibrillation
"4 years ago i had my first Afib 200 heart beat.   they keeped me over night with IV in me and slowed the heart down to about 120   sometime over night it reset its self.

I take Metoprolol  twice a day.  Morning and Night.   and the Doc said if needed take 1 more.

when I first was taken Metoprolol I got tired.  and it took a few weeks to get over that feeling.    But now I don't get tired.  My heart beat is about 65.  

I do still get Afib but not as bad as i did.   I am 47"