It is not a poison. Only people [most of us] allergic to it will react. I have seen hundreds of reactions to it, including severe skin reactions from proximity to burning materials, but have never seen a reaction in the throat or mouth. read more
See your PCP. If you have placed the leaves in contact with your mouth you might get an allergic reaction. read more
If this in any way comes even a little close to impairing your breathing, off you go to the Emergency room. Poison Ivy works as an allergy works, with all the incumbant dangers allergies present. You can also get it in your mouth or tongue by burning it. The toxins travel in the smoke as well. read more