Sneezewort is a flowering plant used to make the Befuddlement Draught, Confusing Concoction, and the Strong Invigoration Draught. According to texts, it's a powerful ingredient because it causes inflammation of the brain. It doesn't need to be added to a potion to have this effect. It is also poisonous to sheep, cattle, and horses.

It gets its name from the Muggle world, where it is used to make sneezing powders.