allergic reactions
"I had a severe allergic reaction to something and was in the ambulance when I was given epinephrine intravenously after Benadryl failed to slow the reaction. The epinephrine hurt as it entered my blood stream; I could trace a burning pins and needles sensation as it traveled up my arm, across my back, and into my head. Then it hit - sudden terrible throbbing headache, my limbs going numb, absolute instant vomiting and involuntary bowel movement. I said "I'm going to die," since it felt like my body was shutting down. My heart rate jumped but my blood pressure dropped like a rock - from 145/95 to 85/50 within thirty seconds. It took several minutes for the pain to subside and the numbness to fade. Did it help? Yes, but I don't think I'll use it again."