Give opium a painkilling effect (#34876)

* Update shock.dm

* Update Chemistry-Reagents.dm

* Update shock.dm

code/modules/mob/living/carbon/shock.dm

@@ -46,11 +46,10 @@
 /mob/living/carbon/proc/handle_shock() //Currently only used for humans
 	update_pain_level()
 
+
+/mob/living/carbon/proc/total_painkillers()
+	for(var/datum/reagent/R in reagents.reagent_list)
+		. += R.pain_resistance
+
 /mob/living/carbon/proc/has_painkillers()
-	if(reagents.has_reagent(PARACETAMOL))
-		return TRUE
-	if(reagents.has_reagent(TRAMADOL))
-		return TRUE
-	if(reagents.has_reagent(OXYCODONE))
-		return TRUE
-	return FALSE
+	return total_painkillers() > 0 

code/modules/reagents/Chemistry-Reagents.dm

@@ -9232,6 +9232,7 @@ var/global/list/tonio_doesnt_remove=list("tonio", "blood")
 	name = "Opium"
 	id = OPIUM
 	description = "Opium is an exceptional natural analgesic."
+	pain_resistance = 80
 	color = "#AE9260" //rgb: 174, 146, 96
 
 /datum/reagent/bicaridine/opium/on_plant_life(obj/machinery/portable_atmospherics/hydroponics/T)