|For a cross-game overview of this perk, see Chem Resistant (perk).|
For the trait, see Chem Resistant (trait).
The perk has two ranks, with the first rank reducing the chance for an addiction by 50 percent, and the second rank granting complete immunity to addictions. It requires having reached level 43 and takes up one point of Endurance per rank.
This perk synergizes well with the Chem Fiend perk.