What is the treatment for an anaphylactic reaction to tree nuts like pecans?

Epinephrine: The best treatment for an anaphylactic reaction to tree nuts would be injectable epinephrine.

Epinephrine, 911: People with nut allergy should always have an Epinephrine auto-injector and be versed in its indications and usage. Epinephrine is the first line treatment for anaphylaxis and its use in the field should always be followed by evaluation in an emergency room. Studies have repeatedly shown that delayed administration of Epinephrine is the number one predictor for bad outcomes in anaphylaxis.