|Mixture of powdered silver and dittany|
"Seals" a werewolf bite.
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").
- Pottermore (Mentioned only)