Left handed nazle powder was a magical dust which is used in potions, and possibly caused the consumer to become left handed. A bottle of this substance was located in the potions classroom at Hogwarts School of Witchcraft and Wizardry from c.1996 onwards. The said sample was described as belonging to the Hogwarts Apothecary Department.
- Harry Potter and the Order of the Phoenix (film) (First appearance)
- Harry Potter and the Half-Blood Prince (film)