diff --git a/code/modules/reagents/chemistry/reagents/drug_reagents.dm b/code/modules/reagents/chemistry/reagents/drug_reagents.dm
index 44b6e85f47..0b44c33926 100644
--- a/code/modules/reagents/chemistry/reagents/drug_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/drug_reagents.dm
@@ -171,11 +171,13 @@
 
 /datum/reagent/drug/methamphetamine/on_mob_metabolize(mob/living/L)
 	..()
-	L.ignore_slowdown(type)
+	ADD_TRAIT(L, TRAIT_IGNOREDAMAGESLOWDOWN, type)
+	L.update_movespeed()
 	ADD_TRAIT(L, TRAIT_TASED_RESISTANCE, type)
 
 /datum/reagent/drug/methamphetamine/on_mob_end_metabolize(mob/living/L)
-	L.unignore_slowdown(type)
+	REMOVE_TRAIT(L, TRAIT_IGNOREDAMAGESLOWDOWN, type)
+	L.update_movespeed()
 	REMOVE_TRAIT(L, TRAIT_TASED_RESISTANCE, type)
 	..()