Those totally awesome people over at the Food Allergy Support Boards have done it again. I think I previously wrote about their resources page that contains tons and tons of great and useful information before. At the bottom of this general page they have added a link to two great things.
The first is an Anaphalyxis Grading Chart. These are charts that help you figure out when you should give the epi-pen. They have even put up two versions of it, the Medical Professionals Chart, and the Average Joe Chart. These charts help assign a grade level to the anaphalyxis based on the symptoms of 5 different body systems, such as cardiovascular and respiratory. They also bold face the symptoms that they feel make an epi-pen necessary.
The second piece of great info is a link entitled Top Ten Mistakes People Make When Using an Epi-Pen. These are some really useful tips to think about now, and not in an emergency situation.