I searched for any topics with Epi-Pen in them, couldn't find any so here's my suggestion. So in DayZ, if you drop to low blood, specifically below 5000, you have a chance of randomly going to an unconscious state right? My suggestion is that if you use an epi-pen on yourself while having a low blood level, it reduces or eliminates this chance of going unconscious for a certain amount of time. :)