Fallout: New Vegas addictions

Overview
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 Blues add-on. Alternatively, a new chem called Fixer will provide temporary relief from the symptoms of withdrawal.

Legend

 * 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.

Bugs

 * 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 will immediately remove the addiction on the PC version.
 * If you attempt to cure hydra addiction, sometimes it will not work.