When the doctor at the Urgent Care clinic determined that I had a blood clot in my leg, Mr. Sirius was told to take me to the local large hospital immediately, and that the clinic people would fax over the paperwork. He did, and the hospital had the paperwork when we got there. Fortunately it was after the local rush hour, so it took all of fifteen minutes to get to the hospital.
I've been told by various medical people and the diabetes teaching nurse at the above-mentioned large hospital that if I ever take my blood sugar and it's either way low (40ish) or way high (say 400+) I am to call an ambulance even if I don't feel that badly. The reason is, with blood sugar that is dangerously low or high, I could very easily pass out and cause an accident. I also don't drive if I'm experiencing a flare of my chronic vertigo to where my head is spinning no matter how I hold it.
(And when writing the above it suddenly occurred to me that the last nasty vertigo attack I had was in January of 2008. Yee-haw!!)