Stimpak

Stimpaks are a popular healing chem. When injected, the chem provides immediate healing of minor wounds.

Superior versions of this chem (but with some drawbacks) are Super Stimpak and Ultra Stimpak.

Fallout, Fallout 2 and Fallout Tactics
In Fallout, Fallout 2 and Fallout Tactics, stimpaks can only restore Hit Points, but cannot heal crippled limbs.

In Fallout 2, Myron can make these if you give him the proper ingredients:
 * Empty Hypodermic
 * Xander Root
 * Broc Flower

Fallout 3
Unlike previous games, in Fallout 3 they can also be used on crippled limbs to heal them.

Appearances
Stimpaks appear in all Fallout games, as well as in DOOM. Super Stimpaks appear in Fallout, Fallout 2, Fallout Tactics and Fallout: Brotherhood of Steel, while Ultra Stimpaks appear only in Fallout Tactics.