Never used Epipens in the office, maybe because I spent enough time in ER and use to drawing up Epi from 1/1000 vials.
I think in 29 years have only had to give Epi twice. The Epi is always in the front of my supply cabinet with an allergy syringe taped to the inside of that cabinet door
[Linked Image from amazingcharts.com]
Suppose a little dosing chart could be taped on the door also but since I don't do little patients I rely on memory.