I mean, the same situation could happen even with medical records, unless you give every hospital instant access to everyone's medical info. I assume you're referring to the sort of situation where one is taken to the ER for emergency treatment; even were an electronic record system to be implemented, how would the hospital obtain records from an unconscious person? That's absolutely the sort of situation where doctors must try emergency treatment and have to risk an adverse reaction. I acknowledge there are flaws to the system, but I fail to see how an electronic system mitigates those flaws.