Is it possible to be allergic to peanut butter and not boiled peanuts?

Unlikely: Roasted peanuts (peanut butter) are more allergenic than peanuts processed in other manners (boiled, pickled or fried) . Ara h2 peanut protein is more responsible for anaphylaxis. However, once a person is sensitized and allergic to peanuts (especially if severe), i would be very cautious and continue to avoid peanuts in all forms including boiled until better tests are available.