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- Hermione Granger: "What are the three most crucial ingredients in a Forgetfulness Potion?"
- Ron Weasley: "I forgot."
- — Ron and Hermione studying for their final exams.[src]
The Forgetfulness Potion was a potion which caused an unknown degree of memory loss in the drinker.[1] Key ingredients included Lethe River Water, mistletoe berries, and valerian sprigs. It can be found in Magical Drafts and Potions.[1]
Professor Severus Snape had his first-year students brew this potion for their final exams in 1992.
Brewing instructions
- Add 2 drops of Lethe River Water to your cauldron
- Gently heat for 20 seconds
- Add 2 Valerian Sprigs to your cauldron
- Stir 3 times, clockwise
- Wave your wand
- Leave to brew and return in 95 minutes
- Add 2 measures of Standard Ingredient to the mortar
- Add 4 Mistletoe Berries to the mortar
- Crush into a medium-fine powder using the pestle
- Add 2 pinches of the crushed mixture to your cauldron
- Stir 5 times, anti-clockwise
- Wave your wand to complete the potion
Appearances
- Harry Potter and the Philosopher's Stone (First appearance)
- Harry Potter and the Philosopher's Stone (film) (Mentioned in a deleted scene)
- Harry Potter Trading Card Game
- Pottermore