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You might not think of a double chin as something that cries out for medical treatment but if it's something that bothers you, you'll be glad to know the U.S. Food and Drug Administration (FDA) has approved a new drug for the condition.

It's called Kybella and when injected below the chin, it destroys the fat cells that cause double chins. It's a version of deoxycholic acid, whicih occurs naturally in the body and helps destroy fat. 

Up to 50 injections can be used in a single treatment, the FDA said but warned against inadvertently injecting it elsewhere, as it can destroy skin.

The drug fillsl a void, since drugs like Botox and dermal fillers aren't approved for fixing fat and loose skin under the chin. 

“It is important to remember that Kybella is only approved for the treatment of fat occurring below the chin, and it is not known if Kybella is safe or effective for treatment outside of this area,” Amy Egan, deputy director of the Office of Drug Evaluation III at the FDA, said in the statement.

Egan warned that the drug should only be administered by a licensed medical professional.

Kybella can cause serious side effects, including nerve injury in the jaw that can cause an uneven smile or facial muscle weakness, and trouble swallowing, the FDA said. The most common side effects of Kybella include swelling, bruising, pain, numbness, redness and areas of hardness in the treatment area.

The drug is manufactured by Kythera Biopharmaceuticals Inc.

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