Being in pharmacy school, I was forced to learn these. I have worked as an intern in a pharmacy for over 2 years now and in that time I have seen ONE prescription written in other than the international system. It was for a "5 grain" asparin, which is just the standard 325 mg dose. They also taught us in school that although we need to learn it, it's all pretty much obsolete.
Honestly, I've already forgotten it
