Great question for discussion and some good points above. Although not a "medication" I would suggest a permanent marker go into your med kit. Handy for a range of things but I think it might be useful in the event that you need to write on a person or yourself about what injuries/bites have been sustained and treatments received. Think about a snake bite when out on your own. Write down type of snake, date and time, known allergies etc in case you are found unresponsive.