sigh

code/modules/mob/mob_defines.dm

@@ -162,6 +162,3 @@
 	var/typing_indicator_timerid
 	/// Current state of our typing indicator. Used for cut overlay, DO NOT RUNTIME ASSIGN OTHER THAN FROM SHOW/CLEAR. Used to absolutely ensure we do not get stuck overlays.
 	var/typing_indicator_current
-
-	///For storing what do_after's someone has, in case we want to restrict them to only one of a certain do_after at a time
-	var/list/do_afters

code/modules/reagents/reagent_containers.dm

@@ -69,7 +69,8 @@
 				to_chat(user, "<span class='notice'>[src]'s transfer amount is now [amount_per_transfer_from_this] units.</span>")
 				return
 
-/obj/item/reagent_containers/attack(mob/M, mob/user, def_zone)
+/obj/item/reagent_containers/attack(mob/living/M, mob/living/user, attackchain_flags = NONE, damage_multiplier = 1)
+	. = ..()
 	if(user.a_intent == INTENT_HARM)
 		return ..()
 

code/modules/reagents/reagent_containers/glass.dm

@@ -9,6 +9,11 @@
 	container_HP = 2
 
 /obj/item/reagent_containers/glass/attack(mob/M, mob/user, obj/target)
+	// WARNING: This entire section is shitcode and prone to breaking at any time.
+	INVOKE_ASYNC(src, .proc/attempt_feed, M, user, target)		// for example, the arguments in this proc are wrong
+	// but i don't have time to properly fix it right now.
+
+/obj/item/reagent_containers/glass/proc/attempt_feed(mob/M, mob/user, obj/target)
 	if(!canconsume(M, user))
 		return
 

code/modules/reagents/reagent_containers/hypospray.dm

@@ -368,6 +368,10 @@
 	return
 
 /obj/item/hypospray/mkii/afterattack(atom/target, mob/user, proximity)
+	. = ..()
+	INVOKE_ASYNC(src, .proc/attempt_inject, target, user, proximity)
+
+/obj/item/hypospray/mkii/proc/attempt_inject(atom/target, mob/user, proximity)
 	if(!vial || !proximity || !isliving(target))
 		return
 	var/mob/living/L = target

code/modules/reagents/reagent_containers/pill.dm

@@ -28,22 +28,24 @@
 /obj/item/reagent_containers/pill/get_w_volume() // DEFAULT_VOLUME_TINY at 25u, DEFAULT_VOLUME_SMALL at 50u
 	return DEFAULT_VOLUME_TINY/2 + reagents.total_volume / reagents.maximum_volume * DEFAULT_VOLUME_TINY
 
-/obj/item/reagent_containers/pill/attack(mob/M, mob/user, def_zone)
+/obj/item/reagent_containers/pill/attack(mob/living/M, mob/living/user, attackchain_flags = NONE, damage_multiplier = 1)
+	INVOKE_ASYNC(src, .proc/attempt_feed, M, user)
+
+/obj/item/reagent_containers/pill/proc/attempt_feed(mob/living/M, mob/living/user)
 	if(!canconsume(M, user))
-		return 0
+		return FALSE
 
 	if(M == user)
 		M.visible_message("<span class='notice'>[user] attempts to [apply_method] [src].</span>")
 		if(self_delay)
 			if(!do_mob(user, M, self_delay))
-				return 0
+				return FALSE
 		to_chat(M, "<span class='notice'>You [apply_method] [src].</span>")
-
 	else
 		M.visible_message("<span class='danger'>[user] attempts to force [M] to [apply_method] [src].</span>", \
 							"<span class='userdanger'>[user] attempts to force [M] to [apply_method] [src].</span>")
 		if(!do_mob(user, M))
-			return 0
+			return FALSE
 		M.visible_message("<span class='danger'>[user] forces [M] to [apply_method] [src].</span>", \
 							"<span class='userdanger'>[user] forces [M] to [apply_method] [src].</span>")
 
@@ -56,8 +58,7 @@
 		reagents.reaction(M, apply_type)
 		reagents.trans_to(M, reagents.total_volume)
 	qdel(src)
-	return 1
-
+	return TRUE
 
 /obj/item/reagent_containers/pill/afterattack(obj/target, mob/user , proximity)
 	. = ..()
@@ -77,6 +78,7 @@
 						"<span class='notice'>You dissolve [src] in [target].</span>", vision_distance = 2)
 	reagents.trans_to(target, reagents.total_volume)
 	qdel(src)
+	return STOP_ATTACK_PROC_CHAIN
 
 /obj/item/reagent_containers/pill/tox
 	name = "toxins pill"

code/modules/reagents/reagent_containers/syringes.dm

@@ -52,8 +52,11 @@
 /obj/item/reagent_containers/syringe/attackby(obj/item/I, mob/user, params)
 	return
 
-/obj/item/reagent_containers/syringe/afterattack(atom/target, mob/user , proximity)
+/obj/item/reagent_containers/syringe/afterattack(atom/target, mob/user, proximity)
 	. = ..()
+	INVOKE_ASYNC(src, .proc/attempt_inject, target, user, proximity)
+
+/obj/item/reagent_containers/syringe/proc/attempt_inject(atom/target, mob/user, proximity)
 	if(busy)
 		return
 	if(!proximity)