--- a/net/minecraft/world/item/ThrowablePotionItem.java
+++ b/net/minecraft/world/item/ThrowablePotionItem.java
@@ -22,11 +22,29 @@
             ThrownPotion thrownPotion = new ThrownPotion(world, user);
             thrownPotion.setItem(itemStack);
             thrownPotion.shootFromRotation(user, user.getXRot(), user.getYRot(), -20.0F, 0.5F, 1.0F);
-            world.addFreshEntity(thrownPotion);
+            // Paper start - PlayerLaunchProjectileEvent
+            com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent event = new com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent((org.bukkit.entity.Player) user.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemStack), (org.bukkit.entity.Projectile) thrownPotion.getBukkitEntity());
+            if (event.callEvent() && world.addFreshEntity(thrownPotion)) {
+                if (event.shouldConsume()) {
+                    itemStack.consume(1, user);
+                } else if (user instanceof net.minecraft.server.level.ServerPlayer) {
+                    ((net.minecraft.server.level.ServerPlayer) user).getBukkitEntity().updateInventory();
+                }
+
+                user.awardStat(Stats.ITEM_USED.get(this));
+            } else {
+                if (user instanceof net.minecraft.server.level.ServerPlayer) {
+                    ((net.minecraft.server.level.ServerPlayer) user).getBukkitEntity().updateInventory();
+                }
+                return InteractionResultHolder.fail(itemStack);
+            }
+            // Paper end - PlayerLaunchProjectileEvent
         }
 
+        /* // Paper start - PlayerLaunchProjectileEvent; moved up
         user.awardStat(Stats.ITEM_USED.get(this));
         itemStack.consume(1, user);
+        */ // Paper end
         return InteractionResultHolder.sidedSuccess(itemStack, world.isClientSide());
     }
 
