diff --git a/qw.rc b/qw.rc
index 177d09c..1d3d4c4 100644
--- a/qw.rc
+++ b/qw.rc
@@ -1205,7 +1205,8 @@ function want_potion(it)
   end
   if sub ~= "curing" and sub ~= "heal wounds" and sub ~= "haste"
      and sub ~= "resistance" and sub ~= "experience" and sub ~= "might"
-     and sub ~= "beneficial mutation" and sub ~= "cure mutation" then
+     and sub ~= "beneficial mutation" and sub ~= "cure mutation" 
+     and sub ~= "cancellation" then
     return false
   end
   return true
@@ -5856,6 +5857,9 @@ function plan_cure_confusion()
       end
       return false
     end
+    if drink_by_name("cancellation") then
+      say("(to cure confusion)")
+      return true
     if drink_by_name("curing") then
       say("(to cure confusion)")
       return true
@@ -5868,6 +5872,18 @@ function plan_cure_confusion()
   return false
 end
 
+function plan_cure_sentinel_mark()
+  if not (danger) then
+    return false
+  end
+  if you.sentinel_mark() then
+    if drink_by_name("cancellation") then
+      say("(to cure sentinel_mark)")
+      return true
+    end
+  end
+return false
+
 function plan_cure_starving()
   if you.hunger_name() == "fainting"
      or (you.hunger_name() == "starving" and not hp_is_low(50)) then
@@ -6460,6 +6476,7 @@ plan_pre_explore2 = cascade {
 plan_emergency = cascade {
   {plan_cure_starving, "cure_starving"},
   {plan_cure_confusion, "cure_confusion"},
+  {plan_cure_sentinel_mark, "cure_sentinel_mark"},
   {plan_choose_tactical_step, "choose_tactical_step"},
   {plan_coward_step, "coward_step"},
   {plan_remove_terrible_jewellery, "remove_terrible_jewellery"},