Narcan can be given by injection...

...using Evzio, a ready to use product. It comes with 2 doses and a trainer. To use the product open the box and there is voice step by step instructions on its use. 

1. Remove cartridge from the case (it will start speaking to you)
2. Pull off red safety guard
3. Place back end on outer thigh press firmly and hold in place for 5 seconds.* 

* It can be given through the clothes