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Most kids with peanut allergies do not outgrow them. But, with a little help, some might be able to better tolerate accidental exposures.

In January, the Food and Drug Administration approved Palforzia, a new drug designed to help kids who are allergic to peanuts react better, if they are accidentally exposed.

"Because there is no cure, allergic individuals must strictly avoid exposure to prevent severe and potentially life-threatening reactions," Dr. Peter Marks, director of the FDA's Center for Biologics Evaluation and Research said at the time in a news release. "When used in conjunction with peanut avoidance, Palforzia provides an FDA-approved treatment option to help reduce the risk of these allergic reactions."

Palforzia is not designed to be administered during an allergic reaction, instead it works as an allergy exposure therapy: children ages 4 through 17 receive daily doses of peanut powder under clinical supervision, and slowly up-dose it over time.

In clinical trials, the strategy worked well, but not perfectly. When peanut-allergic kids were fed 600 milligrams of peanut protein, 67.2% of Palforzia recipients who'd been using the medication for six months tolerated it, while only 4% of the control group did.

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