Mixture of powdered silver and dittany

A mixture of powdered silver and dittany is used by wizards to treat werewolf bites, thus preventing a victim from bleeding to death. Despite this, there are several tales of wizards who begged to be allowed to die, rather than face life as a werewolf.

The different ways of treating werewolf bites were covered on the first-year Defence Against the Dark Arts curriculum at Hogwarts School of Witchcraft and Wizardry (something that the Ministry of Magic deemed an "age appropriate subject" ).

This mixture is, with all likelihood, behind the (false) Muggle belief that a werewolf can be killed by using a silver bullet.

Appearances

 * Pottermore