Use caution if contacted. The sap will cling to clothing and or any other object it has come in contact with, so if someone later touches that object, he or she may develop a rash. Burning poison ivy or poison oak will create toxic oils that are carried by the smoke. If the smoke is inhaled, a rash may develop inside the lungs. Nausea, vomiting, oral burning sensation, sore throat, and blurred vision.
Large amounts can be fatal.
Small sharp crystals may cause intense burning of mouth, tongue, throat and lips. Swollen lips and tongue may interfere with speaking, swallowing, or breathing. Corrosive action to gastrointestinal tract, nausea, vomiting, abdominal pain, diarrhea and headache. Vomiting, diarrhea, abdominal pain, muscle tremors and spasms, nervousness, trembling, weakness, dilated pupils, convulsions. May cause difficulty in breathing.