A few months ago, I cared for a 25 year old female who coded on the operating room table after getting an analgesic shot in the eyeball for Lasik surgery. I cared for her in LTAC after a few weeks of being unresponsive (forgot the Glasgow coma scales I gave her). Yes she had hypothyroidism, hypertension, and brittle diabetes, but to have such a violent reaction to a little shot that millions of people get every year... that's a freak occurence.
Anyone else have similar stories of incredibly rare occurences?