I don’t know to be honest.  My son has only broken his toe and we just gave stress dose orally. 

I do caution you however, about the EMT’s administering the injectable.  Our community will not.  They will not administer any medication that they do not carry on board.  Fortunately for us the Nurse at my son’s school will.  Fortunately she hasn’t had to.  He changes schools next year and I only hope we are as lucky.  We meet with the two schools together on Thursday to discuss his needs.