Fallout Wiki
Fallout Wiki
Gameplay articles
Fallout 2Rad-X
Fallout 3Rad-X
Fallout: New VegasRad-X
Fallout 4Rad-X
Fallout 76Rad-X
Rad-X: diluted
Fallout TacticsRad-X
Fallout: New CaliforniaRad-X

Rad-X is a chem in Fallout, Fallout 2, Fallout Tactics: Brotherhood of Steel, Fallout 3, Fallout: New Vegas, Fallout 4 and Fallout 76.


A potent anti-radiation medicine that bolsters the user's natural Radiation Resistance. Taking it prior to exposure is recommended, as it can greatly reduce irradiation, particularly when combined with advanced radiation suits.[1][2] Unlike most other chems, Rad-X is addiction-free, making it perfectly safe to use without risking the chance of addiction. Furthermore, the duration can be stacked if multiple doses are taken at once.



Fallout4 Rad-X.png

A dose of brightly colored, red-and-yellow capsules.

Rad-X: diluted

Gameplay article: Fallout 76

A diluted version of Rad-X.


  1. Vault Dweller's Survival Guide p.5-18: "Rad-X is a preventive medication. Take Rad-X before exposure to radiation, and the total amount of radiation you receive will be reduced. Rad-X bolsters your bodies own Radiation Resistance. The stronger you are to start with, the more effective Rad-X will be."
  2. Fallout Official Survival Guide p.124: "Rad-X: A radiation prophylactic. Use this drug before you enter a radioactive area, and the total amount of radiation you receive will be reduced. Rad-X increases your body's natural Radiation Resistance."