I've only ever heard of people doing it as part of a research study. There was one I was reading about that's in CA, I think. The researcher is hoping to take it national. There was a really interesting piece about it in the NYTimes a few months ago.
Yes, oral immunotherapy. There are a handful of private practice clinics around the country that do offer this. I am part of a board on FB called Peanut Anaphylaxis Cure and there are a lot of people on there who are either going through it or have already done it. The closest allergist to me that offers it is 5 hours away. I hope it becomes more widespread soon.
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i heard great things about it. Recently there was a post on the yahoo group about a young boy going to the ER from an ana reaction even though he's been on 3 nightly peanuts. But the mom said she thinks it happened because after he had his peanuts he ran for a short distance and when you're eating your daily peanut you're suppose to keep your heart rate steady. So elevated heart rate can cause a reaction. I can't imagine doing this with my hyper kid now. Maybe that's why the doctors want to wait until a child is older too.
Re: OIT for peanut allergy?
ITA, it would be so nice not to have to worry about it all the time. It's stressful even just to visit a friend's house if I know they eat PB.