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