A potion of amnesia (unidentified, a "sparkling potion") is SLASH'EM specific item.
Quaffing it will cause you to forget all of the current map, has a 1/3 chance of causing you to forget some level maps, and another 1/3 chance to forget some discoveries. If it is non-blessed, it also may cause you to forget some spells. If it is blessed, it will cure lycanthropy and sickness and give you 51-100 nutrition points. Monsters will throw this at the player, with the same effects.
Dipping into it will damage items. They may rust or lose rustfroofing, lose enchantment, and magic tools and stones become non-magical. The dipped items will become uncursed.
This potion cannot be cancelled.
Dipping the potion into a water source will cause it to become a potion of water in one dipping, without the diluted stage. This preserves the beattitude of the potion, and as such may be used as a source of (un)holy water if an appropriately aligned altar is unavailable.
This potion can also be used to pacify angry shopkeepers "Shopkeeper looks at you curiously!". They will forget about any debt that you have, but if you are carrying unpaid items, they remain unpaid. However, if you have already stolen the items, by exiting the shop, the shopkeeper will forget about them (since the items are technically considered yours, and you owe the shopkeeper their value). Note that this only seems to work with angry shopkeepers and stolen items. Debt owed to peaceful shopkeepers does not seem to be forgotten.
Hitting a non-covetous monster with a potion of amnesia has a 75% chance of making them peaceful (and untame if they were tame) if they do not resist "Monster looks bewildered!". Hitting a flame sphere or iron golem will do 1d6 damage. Hitting a gremlin will cause it to split, with no other effects. Hitting the Wizard of Yendor will cause you to forget, as per reading a blessed scroll of amnesia. Hitting certain monsters with the potion will produce YAFM and no other effects
|Medusa||Medusa looks like she's having a bad hair day!|
|Croesus||Creosus says: 'My gold! I must count my gold!'|
|Death||Death pauses, then looks at you thoughtfully!|
|Famine||Famine looks unusually hungry!|
|Pestilence||Pestilence looks unusually well!|