Autoinjectors.

Now they are one-use, as they were intended.
You can still change their contents with syringes before they are used.
To mitigate their one-use nature, box of them is added to medical closets and supply pack.

code/datums/supplypacks.dm

@@ -359,7 +359,8 @@ var/list/all_supply_groups = list("Operations","Security","Hospitality","Enginee
 					/obj/item/weapon/reagent_containers/glass/bottle/antitoxin,
 					/obj/item/weapon/reagent_containers/glass/bottle/inaprovaline,
 					/obj/item/weapon/reagent_containers/glass/bottle/stoxin,
-					/obj/item/weapon/storage/box/syringes)
+					/obj/item/weapon/storage/box/syringes,
+					/obj/item/weapon/storage/box/injectors)
 	cost = 10
 	containertype = /obj/structure/closet/crate/medical
 	containername = "Medical crate"

code/game/objects/items/weapons/storage/boxes.dm

@@ -424,6 +424,13 @@
 		W.update_icon()
 		return
 
+/obj/item/weapon/storage/box/injectors
+	name = "box of injectors"
+	desc = "Contains autoinjectors."
+	New()
+		..()
+		for (var/i; i < storage_slots; i++)
+			new /obj/item/weapon/reagent_containers/hypospray/autoinjector(src)
 
 /obj/item/weapon/storage/box/lights
 	name = "replacement bulbs"

code/game/objects/structures/crates_lockers/closets/secure/medical.dm

@@ -13,6 +13,7 @@
 	New()
 		..()
 		sleep(2)
+		new /obj/item/weapon/storage/box/injectors
 		new /obj/item/weapon/storage/box/syringes(src)
 		new /obj/item/weapon/reagent_containers/dropper(src)
 		new /obj/item/weapon/reagent_containers/dropper(src)

code/modules/reagents/reagent_containers/hypospray.dm

@@ -20,17 +20,17 @@
 
 /obj/item/weapon/reagent_containers/hypospray/New() //comment this to make hypos start off empty
 	..()
-	reagents.add_reagent("doctorsdelight", 30)
+	reagents.add_reagent("tricordrazine", 30)
 	return
 
 /obj/item/weapon/reagent_containers/hypospray/attack(mob/M as mob, mob/user as mob)
 	if(!reagents.total_volume)
-		user << "\red The hypospray is empty."
+		user << "\red [src] is empty."
 		return
 	if (!( istype(M, /mob) ))
 		return
 	if (reagents.total_volume)
-		user << "\blue You inject [M] with the hypospray."
+		user << "\blue You inject [M] with [src]."
 		M << "\red You feel a tiny prick!"
 
 		src.reagents.reaction(M, INGEST)
@@ -41,7 +41,7 @@
 				injected += R.name
 
 			var/trans = reagents.trans_to(M, amount_per_transfer_from_this)
-			user << "\blue [trans] units injected.  [reagents.total_volume] units remaining in the hypospray."
+			user << "\blue [trans] units injected.  [reagents.total_volume] units remaining in [src]."
 
 			var/contained = english_list(injected)
 
@@ -50,3 +50,40 @@
 			user.attack_log += text("\[[time_stamp()]\] <font color='red'>Used the [src.name] to inject [M.name] ([M.ckey]) with [contained]</font>")
 
 	return
+
+/obj/item/weapon/reagent_containers/hypospray/autoinjector
+	name = "autoinjector"
+	desc = "A rapid and safe way to administer small amounts of drugs by untrained or trained personnel."
+	icon_state = "autoinjector"
+	item_state = "autoinjector"
+	amount_per_transfer_from_this = 5
+	volume = 5
+
+/obj/item/weapon/reagent_containers/hypospray/autoinjector/New()
+	..()
+	reagents.remove_reagent("tricordrazine", 30)
+	reagents.add_reagent("inaprovaline", 5)
+	update_icon()
+	return
+
+/obj/item/weapon/reagent_containers/hypospray/autoinjector/attack(mob/M as mob, mob/user as mob)
+	..()
+	if(reagents.total_volume <= 0)
+		flags &= ~OPENCONTAINER
+	update_icon()
+	return
+
+/obj/item/weapon/reagent_containers/hypospray/autoinjector/update_icon()
+	if(reagents.total_volume > 0)
+		icon_state = "[initial(icon_state)]1"
+	else
+		icon_state = "[initial(icon_state)]0"
+
+/obj/item/weapon/reagent_containers/hypospray/autoinjector/examine()
+	..()
+	if(reagents && reagents.reagent_list.len)
+		usr << "\blue It is currently loaded."
+	else
+		usr << "\blue It is spent."
+
+