Is it possible to be allergic to peanut butter, but u can eat peanuts without any allergy reaction?

Check Ingredients: If you tolerate a food in one form but not another, this does not represent an ige mediated allergy (type 1 hypersensitivity). For example, a person who does not tolerate milk but eats dairy based ice cream without a problem does not have a dairy allergy. For your question regarding peanut butter, if you had an immediate reaction, it may be another ingredient in the peanut butter besides peanut.