The U.S. Food and Drug Administration is ratcheting up its warning about the potential side effects of a type of commonly-prescribed powerful antibiotic often known by the brand name Cipro.
The FDA says the potential side effects of fluoroquinolone anti-bacterial drugs often outweigh their benefits when it comes to treating people with bronchitis or basic sinus or urinary tract infections.
As a result, the FDA says doctors should use these types of drugs only if they have no alternatives.
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The FDA issued previous warnings about the drugs in 2008 and 2013, but didn't go so far as to advise doctors to restrict their use.