References from the canon
- Harry copied down some additional tips on making Everlasting Elixirs found in the Half-Blood Prince's potion book (HBP15)
The term "elixir" is often associated with solutions created by alchemists to give immortality, which makes the name "everlasting" appropriate. These so-called Elixirs of Life are found in the legends from different cultures around the world. Nicolas Flamel, in the Potter universe, created the Elixir of Life using the Philosopher's Stone.
From the Web
Elixir of Life from Wikipedia