Used in Polyjuice Potion (see).
Leeches are used in Polyjuice Potion, apparently whole (see).
Leech juice is used in Shrinking Solution (see).
ingredients: unknown, but it is derived from the Philosopher's Stone
The Elixir of Life extends life, but requires that the drinker consume it regularly for all eternity if the drinker is to maintain his or her immortality (HBP23).
Someone dependent on the Elixir can die if the supply runs out (for instance, if the Philosopher's Stone being used to make it is stolen or destroyed) or if the supply of Elixir is contaminated (HBP23).
Spine of lionfish is part of a student's standard potion-making kit (GF10)
Effect: Causes someone to fall into a deep sleep.
First potion brewed in Slughorn's sixth-year N.E.W.T. Potions class. Instructions for brewing this potion can be found in Advanced Potion-Making starting on page 10, but the textbook's uncorrected instructions do not cover the most effective way of squeezing the juice out of the sopophorous beans (crushing with the flat side of a silver dagger rather than cutting) and do not indicate that a clockwise stir should be added after every seventh counter-clockwise stir. While brewing, the potion releases blue steam. The ideal halfway stage should be of a blackcurrant colour (deep purple), although at a later stage if stirred properly the potion will turn a light shade of lilac and then, eventually, "clear as water" (HBP9).
An herb used in Confusing and Befuddlement Draughts.
Effect: Does not really causes the person who drinks it to fall in love with someone, as it is impossible to manufacture or imitate love. A love potion simply causes the drinker to develop a powerful infatuation or obsession with the target (HBP9).
Weasleys' Wizard Wheezes sell powerful love potions as part of their WonderWitch products line (HBP6). As part of their Owl Order Service, Weasleys' Wizard Wheezes delivers such products disguised as more innocent items, such as perfumes and cough potions, a fact they make clear on the products' own labels (HBP9).
The duration of the effects of a love potion vary depending on such factors as the weight of the person drinking the potion and the attractiveness of the person with whom the potion is supposed to make the drinker obsessed (HBP6).
The effects of a love potion wear off naturally over time, but can be renewed by administering further doses of potion (HBP10).
A love potion can be administered so that the consumer becomes obsessed with the target even if the target is not present when the love potion is consumed (HBP18).
The effects of an item spiked with love potion can strengthen the longer the item is kept before consumption (HBP18).
c.f. Hate Potion