MedicAlert is a non-profit
foundation established to serve people with severe allergies and other conditions which need to be identified in a medical emergency. MedicAlert members wear a bracelet or pendant with the MedicAlert telephone number and caduceus logo, a concise medical
summary, and a personal ID number. Emergency responders
worldwide are trained to look for this emblem. When they call MedicAlert with the ID number, they can be given detailed information on medications, allergies, and medical conditions, as well as physician and family contact information.
For the last two years, I've worn one of these, engraved with NARCOLEPSY. ALLERGIC TO PENICILLIN. When you've passed out in a college dormitory hall, it's a good thing for security people to be able to differentiate between cataplexy and drunk off your ass.