diff --git a/code/modules/surgery/helpers.dm b/code/modules/surgery/helpers.dm
index afa0429bdc0..1c54b24ba6b 100644
--- a/code/modules/surgery/helpers.dm
+++ b/code/modules/surgery/helpers.dm
@@ -81,7 +81,24 @@
 			return 1
 	return 0
 
-
+/proc/get_pain_modifier(mob/living/carbon/human/M) //returns modfier to make surgery harder if patient is conscious and feels pain
+	if(M.stat && !M.sleeping) //stat=0 if CONSCIOUS, 1=UNCONSCIOUS and 2=DEAD. Operating on dead people is easy, too. Just sleeping won't work, though.
+		return 1
+	if(NO_PAIN in M.species.species_traits)//if you don't feel pain, you can hold still
+		return 1
+	if(M.reagents.has_reagent("hydrocodone"))//really good pain killer
+		return 0.99
+	if(M.reagents.has_reagent("morphine"))//Just as effective as Hydrocodone, but has an addiction chance
+		return 0.99
+	if(M.drunk >= 80)//really damn drunk
+		return 0.95
+	if(M.drunk >= 40)//pretty drunk
+		return 0.9
+	if(M.reagents.has_reagent("sal_acid")) //it's better than nothing, as far as painkillers go.
+		return 0.85
+	if(M.drunk >= 15)//a little drunk
+		return 0.85
+	return 0.8 //20% failure chance
 
 /proc/get_location_modifier(mob/M)
 	var/turf/T = get_turf(M)
diff --git a/code/modules/surgery/surgery.dm b/code/modules/surgery/surgery.dm
index 8861380527a..1d836259cbe 100644
--- a/code/modules/surgery/surgery.dm
+++ b/code/modules/surgery/surgery.dm
@@ -116,6 +116,12 @@
 			prob_chance = allowed_tools[implement_type]
 		prob_chance *= get_location_modifier(target)
 
+
+		if(!ispath(surgery.steps[surgery.status], /datum/surgery_step/robotics))//Repairing robotic limbs doesn't hurt
+			if(ishuman(target))
+				var/mob/living/carbon/human/H = target //typecast to human
+				prob_chance *= get_pain_modifier(H)//operating on conscious people is hard.
+
 		if(prob(prob_chance) || isrobot(user))
 			if(end_step(user, target, target_zone, tool, surgery))
 				advance = 1