A variety of new chems were introduced in Fallout: New Vegas. Addiction in Fallout: New Vegas works very similarly to addiction in Fallout 3 in that addiction does not go away after quitting cold turkey. Fallout: New Vegas also makes use to the "usage monitor" system (or UMON), which tracks successive uses of a chem and raises the chance of addiction in accordance. A UMON value of 75 infers an addiction chance by 1%, and a value of 175 raises addiction chance to 100%.
However, addictions may be handled by paying a doctor to remove them or by using the Sink Auto-Doc with the Old World Bluesadd-on. Alternatively, a new chem called Fixer will provide temporary relief from the symptoms of withdrawal.
Types of addiction[]
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Risk is a base chance of addiction per use for alcohol only.
UMON is an accumulating chance of addiction for chems. See above for a detailed explanation.
Duration is the length of time required to pass without consuming the drug for the accumulated UMON value to be reduced.
Fixer can permanently remove addictions in an unpatched game.
Ant nectar addiction used to be incurable due to a bug, but this was fixed in Fallout: New Vegas patch 1.2.0.31x. The console command Player.RemoveSpell 0006DC6E will immediately remove the addiction on the PC version.
If you attempt to cure hydra addiction, sometimes it will not work.
(uses jet addiction)