Forgetfulness Potion

The Forgetfulness Potion is a potion which causes an unknown degree of memory loss in the drinker. The recipe for this potion can be found in Magical Drafts and Potions; its key ingredients include Lethe River Water, mistletoe berries, and Valerian sprigs.

Professor Severus Snape had his first-year students brew this potion for their final exams in 1992.

Brewing instructions

 * 1) Add 2 drops of Lethe River Water to your cauldron
 * 2) Gently heat for 20 seconds
 * 3) Add 2 Valerian sprigs to your cauldron
 * 4) Stir 3 times, clockwise
 * 5) Wave your wand
 * 6) Leave to brew and return in 45-60 minutes
 * 7) Add 2 measures of Standard Ingredient to the mortar
 * 8) Add 4 mistletoe berries to the mortar
 * 9) Crush into a medium-fine powder using the pestle
 * 10) Add 2 pinches of the crushed mixture to your cauldron
 * 11) Stir 5 times, anti-clockwise
 * 12) Wave your wand to complete the potion

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (film)
 * Harry Potter Trading Card Game
 * Pottermore