Fixes and test.

code/modules/projectiles/ammunition/special/syringe.dm

@@ -61,8 +61,8 @@
 	..()
 
 /obj/item/ammo_casing/syringegun/dart
-	name = "syringe gun spring"
-	desc = "A high-power spring that throws syringes."
-	projectile_type = /obj/item/projectile/bullet/dart/syringe
+	name = "dart gun air canister"
+	desc = "A small canister of compressed gas."
+	projectile_type = /obj/item/projectile/bullet/dart/syringe/dart
 	firing_effect_type = null
 	harmful = FALSE

code/modules/projectiles/guns/misc/syringe_gun.dm

@@ -110,6 +110,7 @@
 	item_state = "dartgun"
 	materials = list(MAT_METAL=2000, MAT_GLASS=500)
 	suppressed = TRUE //Softer fire sound
+	can_unsuppress = FALSE
 
 /obj/item/gun/syringe/dart/Initialize()
 	..()

code/modules/projectiles/projectile/bullets/dart_syringe.dm

@@ -9,12 +9,14 @@
 	create_reagents(50)
 	reagents.set_reacting(FALSE)
 
-/obj/item/projectile/bullet/dart/on_hit(atom/target, blocked = FALSE)
+/obj/item/projectile/bullet/dart/on_hit(atom/target, blocked = FALSE, skip = FALSE)
 	if(iscarbon(target))
 		var/mob/living/carbon/M = target
 		if(blocked != 100) // not completely blocked
 			if(M.can_inject(null, FALSE, def_zone, piercing)) // Pass the hit zone to see if it can inject by whether it hit the head or the body.
 				..()
+				if(skip == TRUE)
+					return
 				reagents.reaction(M, INJECT)
 				reagents.trans_to(M, reagents.total_volume)
 				return TRUE
@@ -37,3 +39,49 @@
 /obj/item/projectile/bullet/dart/syringe
 	name = "syringe"
 	icon_state = "syringeproj"
+
+//I am in a mess of my own making
+/obj/item/projectile/bullet/dart/syringe/dart
+	name = "Smartdart"
+	icon_state = "syringeproj"
+	damage = 0
+
+/obj/item/projectile/bullet/dart/syringe/dart/on_hit(atom/target, blocked = FALSE)
+	message_admins("Dart landed!")
+	if(iscarbon(target))
+		var/mob/living/carbon/M = target
+		if(blocked != 100) // not completely blocked
+			if(M.can_inject(null, FALSE, def_zone, piercing)) // Pass the hit zone to see if it can inject by whether it hit the head or the body.
+				..(target, blocked, TRUE)
+				message_admins("Checking reagents")
+				for(var/datum/reagent/R in reagents.reagent_list) //OD prevention time!
+					message_admins("Reagent: [R]")
+					if(istype(R, /datum/reagent/medicine)) //Is this a medicine?
+						message_admins("Is a medicine")
+						if(M.reagents.has_reagent(R.id))
+							message_admins("reagent found! with new")
+							var/datum/reagent/medicine/Rm = locate(R) in M
+							if(R.overdose_threshold == 0) //Is there a possible OD?
+								M.reagents.add_reagent(R.id, R.volume)
+							else
+								var/transVol = CLAMP(R.volume, 0, (R.overdose_threshold - Rm.volume) -1)
+								M.reagents.add_reagent(R.id, transVol)
+							target.visible_message("<span class='notice'>\The [src] beeps!</span>")
+							return TRUE
+						else
+							if(!R.overdose_threshold == 0)
+								var/transVol = CLAMP(R.volume, 0, R.overdose_threshold-1)
+								M.reagents.add_reagent(R.id, transVol)
+							else
+								M.reagents.add_reagent(R.id, R.volume)
+							target.visible_message("<span class='notice'>\The [src] beeps!</span>")
+							to_chat("<span class='notice'><i>You feel a tiny prick, and turn around to see a smartdart embedded in your butt.</i.</span>")
+							return TRUE
+
+			else
+				blocked = 100
+				target.visible_message("<span class='danger'>\The [src] was deflected!</span>", \
+									   "<span class='userdanger'>You see a [src] bounce off you, booping sadly!</span>")
+
+	target.visible_message("<span class='danger'>\The [src] fails to land on target!</span>")
+	return TRUE

code/modules/reagents/reagent_containers/syringes.dm

@@ -14,7 +14,6 @@
 	var/proj_piercing = 0 //does it pierce through thick clothes when shot with syringe gun
 	materials = list(MAT_METAL=10, MAT_GLASS=20)
 	container_type = TRANSPARENT
-	var/Sname = "syringe"
 
 /obj/item/reagent_containers/syringe/Initialize()
 	. = ..()
@@ -73,7 +72,7 @@
 		if(SYRINGE_DRAW)
 
 			if(reagents.total_volume >= reagents.maximum_volume)
-				to_chat(user, "<span class='notice'>The [Sname] is full.</span>")
+				to_chat(user, "<span class='notice'>The syringe is full.</span>")
 				return
 
 			if(L) //living mob
@@ -138,8 +137,8 @@
 						return
 					if(L.reagents.total_volume >= L.reagents.maximum_volume)
 						return
-					L.visible_message("<span class='danger'>[user] injects [L] with the [Sname]!", \
-									"<span class='userdanger'>[user] injects [L] with the [Sname]!</span>")
+					L.visible_message("<span class='danger'>[user] injects [L] with the syringe!", \
+									"<span class='userdanger'>[user] injects [L] with the syringe!</span>")
 
 				if(L != user)
 					log_combat(user, L, "injected", src, addition="which had [contained]")
@@ -148,7 +147,7 @@
 			var/fraction = min(amount_per_transfer_from_this/reagents.total_volume, 1)
 			reagents.reaction(L, INJECT, fraction)
 			reagents.trans_to(target, amount_per_transfer_from_this)
-			to_chat(user, "<span class='notice'>You inject [amount_per_transfer_from_this] units of the solution. The [Sname] now contains [reagents.total_volume] units.</span>")
+			to_chat(user, "<span class='notice'>You inject [amount_per_transfer_from_this] units of the solution. The syringe now contains [reagents.total_volume] units.</span>")
 			if (reagents.total_volume <= 0 && mode==SYRINGE_INJECT)
 				mode = SYRINGE_DRAW
 				update_icon()
@@ -159,7 +158,7 @@
 	var/rounded_vol
 	if(reagents && reagents.total_volume)
 		rounded_vol = CLAMP(round((reagents.total_volume / volume * 15),5), 1, 15)
-		var/image/filling_overlay = mutable_appearance('icons/obj/reagentfillings.dmi', "[Sname][rounded_vol]")
+		var/image/filling_overlay = mutable_appearance('icons/obj/reagentfillings.dmi', "syringe[rounded_vol]")
 		filling_overlay.color = mix_color_from_reagents(reagents.reagent_list)
 		add_overlay(filling_overlay)
 	else
@@ -265,23 +264,64 @@
 	return mutable_appearance('icons/obj/clothing/belt_overlays.dmi', "pouch")
 
 /obj/item/reagent_containers/syringe/dart
-	name = "medicinal dart"
-	desc = "A non-harmful dart that can administer medication from a range. Unable to hold any caustic or toxic chemicals without disintegrating"
+	name = "medicinal smartdart"
+	desc = "A non-harmful dart that can administer medication from a range. Once it hits a patient, only medicines are administered to the patient using a smart nanofilter and capillary action."
 	volume = 20
 	amount_per_transfer_from_this = 20
 	icon = 'icons/obj/dart.dmi'
-	Sname = "dart"
+	item_state = "dart_0"
 	//harmful = FALSE
 
 /obj/item/reagent_containers/syringe/dart/afterattack(atom/target, mob/user , proximity)
-	..()
-	for(var/datum/reagent/R in src.reagents.reagent_list)//(!R == /datum/reagent/fermi) ||
-		if((!R == /datum/reagent/medicine) || (!R == /datum/reagent/consumable))
-			qdel(src)
-			to_chat(user, "<span class='notice'>The dart dissolves under the caustic nature of the chems!</span>")
+
+	if(busy)
+		return
+	if(!proximity)
+		return
+	if(!target.reagents)
+		return
+
+	var/mob/living/L
+	if(isliving(target))
+		L = target
+		if(!L.can_inject(user, 1))
+			return
+
+	switch(mode)
+		if(SYRINGE_DRAW)
+
+			if(reagents.total_volume >= reagents.maximum_volume)
+				to_chat(user, "<span class='notice'>The dart is full!</span>")
+				return
+
+			if(L) //living mob
+				to_chat(user, "<span class='warning'>You can't draw blood using a dart!</span>")
+				return
+
+			else //if not mob
+				if(!target.reagents.total_volume)
+					to_chat(user, "<span class='warning'>[target] is empty!</span>")
+					return
+
+				if(!target.is_drawable())
+					to_chat(user, "<span class='warning'>You cannot directly remove reagents from [target]!</span>")
+					return
+
+				var/trans = target.reagents.trans_to(src, amount_per_transfer_from_this) // transfer from, transfer to - who cares?
+
+				to_chat(user, "<span class='notice'>You soak the [src] with [trans] units of the solution. It now contains [reagents.total_volume] units.</span>")
+			if (reagents.total_volume >= reagents.maximum_volume)
+				mode=!mode
+				update_icon()
+
+		if(SYRINGE_INJECT)
+			src.visible_message("<span class='danger'>The smartdart gives a frustrated boop! It's ready and full; You need to shoot someone with it!</span>")
+
+/obj/item/reagent_containers/syringe/dart/attack_self(mob/user)
+	return
 
 /obj/item/reagent_containers/syringe/dart/bluespace
-	name = "bluespace dart"
+	name = "bluespace smartdart"
 	desc = "A non-harmful dart that can administer medication from a range, with extended 60u capacity. Unable to hold any caustic or toxic chemicals without disintegrating"
 	amount_per_transfer_from_this = 20
 	volume = 60