It's not allowed in this case because the FDA, rightly or wrongly, wants the patient trained in the use of the specific injector they are being prescribed. Hav

It's not allowed in this case because the FDA, rightly or wrongly, wants the patient trained in the use of the specific injector they are being prescribed. Having never needed one I don't know what the practical differences between the operation of an Epipen injector and Adrenaclick injector are, but the FDA seems to think they exist.