Afraid to take a beta blocker med - I am concern about side effects 25 mgs of metoprolol ER for hrt race. HR up/down 2day, hrt r been ok till 2day.?

Side effects minimal. 25mg metoprolol is a low dose and should cause minimal if any side effects but should be effective for heart racing. I take 100mg daily for high blood pressure and have no noticeable side effects. Thanks for trusting HealthTap!