Syracuse (WSYR-TV) -- If you take a beta blocker to control your high blood pressure, it may not be as effective as you thought.
A study in the Journal of the American Medical Association raises doubts about how well beta blockers work.
Researchers looked at almost 45,000 patients taking beta blockers for more than four years. Some patients had had a prior heart attack; some had cardiovascular disease with no heart attack; and others had cardiovascular risk factors only.
The authors conclude that use of beta blockers was not associated with a lower risk of cardiovascular events, even among patients with a prior history of heart attack.
Beta blockers have been widely and safely used for many reasons, but more research may be needed to identify subgroups that can benefit from them.