The pill helps train the immune system to not over-react to peanuts. Phase three trials show it's safe and effective and worked in about 70 percent of patients tested.
It's not a cure but it can lower the risk of a life-threatening reaction in case someone accidentally eats a nut.
Amy Gurango's son has a peanut allergy.
"This gives us hope that through the pill he'll be able to eventually tolerate peanuts and it'll be less scary for him," she said.
The treatment would be a life-long therapy. Researchers expect it to be available in one to two years.
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