Rat spleen

Rat spleen is a common ingredient used in the preparation of various potions. It can be found in potions such as Shrinking Solution and Dragon Dung Fertiliser.

In 1993, Neville Longbottom added too many rat spleens and too much leech juice into his Shrinking Solution, making it posionous. Hermione Granger helped Neville fix the potion before Snape had a chance to test it on Neville's toad, Trevor.

Appearances

 * Harry Potter and the Prisoner of Azkaban
 * Harry Potter and the Prisoner of Azkaban (video game)
 * Harry Potter and the Half-Blood Prince (video game)