All of a sudden metoprolol does not work...

Question

I started taking Metoprolol er a month ago for tachycardia. I take 25mg daily. My BP was not an issue. The med now is not bringing my heart rate down any where near as well as it was in the beginning. When I first took the drug my heart rate was in the 50s ....now its averaging in a 24hr period about 15 bpms higher thank before. What is going on ? Something doesn't make sense ? Why is this happening ? I do not feel anxious. The metoprolol  is not working as well. Has anyone else had experiences where the metoprolol is not working as well after a month.I do not want to increase the dosage.  My heart rate was in the low 50s when I first started taking the beta blocker...now its in the mid to upper 70 s and i don't want take more of the drug. My goal is to get off the drug....but, its not working as well as its was. Has this happened to other people ? Is it a termporary thing ?

jrbon · Answer

By any chance have you started a new batch?

It happened twice to me with Carvedilol, the batch did not have the dose that it was suppose to have.

Jesus

Bamajoe · Answer

I am taking 100mg a day of Metoprolol since I had open heart to remove a benin tumor. Although my BP was elevated at some parts of the day I was not on any meds prior to surgery. Unbeknownst to me, my surgeon and others. I was having A fib prior to surgery. I still had it after the surgery too. I started out like you on 25 mg a day of Metoprolol now I am up to 100mg. My HR still gets up sometimes to the 90's I also developed pericardial effusion. (inflammation and fluid build up around the heart) It could be that an increase of Metoprolol would do the trick. It might make you tired though. But if your HR is not more than 90 at any point of the day I think your doc may not increase it. I don't think Occupant was being sarcastic because normal resting HR is 60-100 BPM. I hope you find out what is going on this stuff is very frustrating for sure.

Flycaster305 · Answer

Our bodies do tend to adjust to to medications and our organs do tend to get used to them and return to earlier patterns. Metoprolol is a pretty basic Beta Blocker, there are much stronger beta blockers that will indeed take your blood pressure lower, like Coreg, but drugs of that class are very difficult to take. It's possible that you need to evaluated for a different medication or perhaps a pacemaker. I'd suggest Occupant asked a very good question based on your inquiry. Does it rise higher than65 bpm? I'm wondering if you have been checked for A-Fib. Keep us informed.

LorrieLee · Answer

because it doesn't stay at 65 bpm  and thats not what its been doing since I started taking that medication .

I would appreciate no more of your sarcastic replies.