Antidote

is a type of medicine that act as a cure from various poisons. They can be administered to an infected person through several mediums. Some poisons are really complex and require careful attention or else the victim will die. However, specially trained, genius medical ninjas like Tsunade or Sakura Haruno can actually analyze and decipher the many different elements used in complex poisons and create a cure. Sasori noted that when making antidotes not even a hairline mistake could be made or else it wouldn't work.

Types
There are different types of antidotes.
 * Antidotes are able to take liquid form and can thus be drank by people.
 * Members of the Aburame clan are able to use their kikaichū insects to enter the body of a poisoned victim where upon they will remove and neutralize the poison in the person's body.
 * The poison of the nano-sized, venomous insects that are used by Torune and Shikuro Aburame also has an antidote.
 * During battle it is hard to treat a poisoned ally, for situations like these medical ninja can make the antidotes into capsules or shots and inject the injured victim with it.

Combating Poisons
Certain characters have encountered poisons throughout their careers as ninja. During the Second Shinobi World War, Tsunade, was able to produce antidotes to every one of Chiyo's poisons, much to the latter's resentment. During the mission to rescue Gaara, Sakura Haruno demonstrated the skill to not only extract and analyze Sasori's poison swiftly, but also produced an antidote to counter it.

Apart from using antidotes to poisons, a ninja can also work to build-up a tolerance to certain poisons by gradually exposing oneself to non-lethal amounts of those poisons. Orochimaru, in the effort to make Sasuke Uchiha into the perfect vessel for his Living Corpse Reincarnation technique, made it a point to make Sasuke immune to most poisons, such as the one that Shizune taught to Sakura Haruno in order to use on her kunai.