Vulneraries (傷薬 Kizu-gusuri) are Hit Pointrestoring items that appear in all of the Fire Emblem games in the series. In the majority of the Fire Emblem games, they heal 10 hit points.
Not much information is given related to their origins, only in the manner they are used. Vulneraries are described as medical solutions that are contained within flasks. In different instances, characters have spoken about either rubbing the solution on a wound or simply drinking its contents. Due to this, it is unclear how the vulneraries are supposed to be used, whether they can be used either way, or if it varies by the game.
The amount of uses the vulneraries have also varies from game to game. They have 3 uses in the majority of the Fire Emblem games. Finally they had 8 uses in Fire Emblem: Radiant Dawn, possibly due to the increased difficulty of several stages in the game.
Vulneraries can be purchased in most of the Fire Emblem games at any vendor. The price of a vulnerary varies from game to game. As an example, they cost 300 Gold in Fire Emblem: Path of Radiance. Many enemies in the games also carry vulneraries for the purpose of healing themselves; with the services of a thief(or any promotions therein), they can be stolen from enemy units.
In Fire Emblem: The Sacred Stones, there is an unused vulnerary that has 60 uses, and two others that look like musical notes (One red, one bluish-green) that have 60 uses as well, but have no use, as they cannot heal. It is unknown as to why these two are shaped like musical notes.