© 2020 Texas Public Radio
Real. Reliable. Texas Public Radio.
Play Live Radio
Next Up:
Available On Air Stations

Some Antibiotics May Cause Tendon Problems

Ciproflaxin is one of the antibiotics in the class called fluoroquinolones.

Antibiotics are supposed to make people better. Now, though, a Texas doctor has documented more evidence of a risk the Food and Drug Administration highlighted in a recent warning. He’s concerned about one class of antibiotics that can increase the risk of tendon ruptures. 


They’re called fluoroquinolones – the class of broad spectrum antibiotics used to treat bacterial infections like pneumonia, urinary tract infections and sinusitis. You may have heard of Levoquin or Cipro, the medication in the news a few years back for treating anthrax when Americans were frightened of an attack.

Baylor College of Medicine orthopedic sports medicine specialists, Theodore Shybut, MD, said he’s noticed an association between the use of fluoroquinolones and an increased risk of tendon ruptures.

Credit Baylor College of Medicine
Theodore Shybut, MD, is an orthopedic sports medicine specialist with Baylor College of Medicine.


"People that might be prescribing antibiotics to athletes, it’s very important to be aware of how serious the potential side effects could be," Shybut stressed.

Shybut recently published two case studies in the journal Sports Health where he documented triceps tendon ruptures, a rare injury, in two men who had taken a round of these antibiotics three months before.

In 2016, the FDA issued a warning about fluoroquinolones, citing the potential for quote “disabling and potentially permanent serious side effects involving tendons, muscles, joints and nerves.”

Shybut said while most peple treated with these drugs are just fine and don’t develop problems, he says physicians may want to consider other antibiotics, if they will work, before they try Cipro or Levoquin.

"We’ll certainly be curious to see in people who present with other ruptures how many of them have been on fluoroquinolones," he added.

Side effects from the use of this class of antibiotics usually show up within six months of use.