Chem Resistant (perk)

Chem Resistant is a perk in Fallout 3, Fallout: New Vegas and Fallout 4.

Effects
Having the Chem Resistant perk means you're 50% less likely to develop an addiction to chems, like psycho or jet.

This perk is rendered useless if the Courier opts for Logan's Loophole trait in Old World Blues.