Aa
A
A
A
Close
Heart Disease Community
20.1k Members
Avatar universal

Beta Blocker and PACs

Maybe this is a dumb question, but is there any chance that a beta blocker (metoprolol ER, the generic form of toprol XL) could actually increase the frequency of PACs? I was put on toprol almost a year ago after an episode of a-fib. After taking it for several weeks, I began to have PACs more and more often. My cardiologist kept increasing the dose to reduce the PACs, but every time they just kept increasing. Now I am having extended periods every day where every 3rd or 4th beat is a PAC. I am wondering if this could be a paradoxical effect of the toprol, since before I started taking it I only had occasional isolated PACs, never long strings of them. They almost always start around the same time of day (10am-noon), which is about 4 hours after I take my morning dose of toprol. My doctor's solution always seems to be to keep ramping up the dosage, but I am reluctant to continue doing this since it doesn't seem to be working and I am concerned about side effects. I would appreciate any insight anyone might have about this.
2 Responses
61536 tn?1340701763
It's not a dumb question at all.  Yes, in some people beta blockers can actually increase PACs (or PVCs).  It's unfortunate and quite annoying, but it can happen.
Avatar universal
It absolutely did it to me along with a host of other awful side effects......see my response post detailing this.........its in response to your similar post on the 15th regarding the same question.

My best to you.....
Have an Answer?
Top Heart Disease Answerers
159619 tn?1538184537
Salt Lake City, UT
11548417 tn?1506084164
Netherlands
Learn About Top Answerers
Didn't find the answer you were looking for?
Ask a question
Popular Resources
Is a low-fat diet really that heart healthy after all? James D. Nicolantonio, PharmD, urges us to reconsider decades-long dietary guidelines.
Can depression and anxiety cause heart disease? Get the facts in this Missouri Medicine report.
Fish oil, folic acid, vitamin C. Find out if these supplements are heart-healthy or overhyped.
Learn what happens before, during and after a heart attack occurs.
What are the pros and cons of taking fish oil for heart health? Find out in this article from Missouri Medicine.
How to lower your heart attack risk.