Addiction

Addiction to a substance, or activity, means your body (or your mind) is in need of a daily dose to avoid withdrawal symptoms.

Overview

 * You can get addicted when you use too many drugs. As an addict, you suffer withdrawal symptoms only when you run out of supplies. Many substances in the Fallout games are addictive. Each chem has a chance of addiction. One of the most addictive drugs is Jet.
 * For Fallout 1 & 2, withdrawal effects occur after becoming addicted and going for some amount of time without using that chem. For non-jet addictions, addiction lasts 7 days from the onset of the withdrawal effects (nine days of non-use), while jet addiction lasts forever without the Jet Antidote.

Types of addiction
* Only in modded versions.

Fallout, Fallout 2, Fallout Tactics

 * In Fallout Tactics you can gain the Psychotic perk which makes you suffer less withdrawal from Psycho.

Fallout 3

 * In Fallout 3, addiction is permanent. It can, however, be cured for a price in caps by visiting a doctor (like the one in Megaton). If you own a house in either Megaton or Tenpenny Tower, the addiction can be cleared for free if you own a My First Laboratory house improvement.


 * Items not listed in this table are not addictive in Fallout 3; This includes Rad-X, RadAway, and some other substances.


 * Risk is a base chance of addiction per use, and only applies to alcohol items in Fallout 3.
 * Magnitude is an accumulating chance of addiction. Each time you use an item, its magnitude is added to the total value before the addiction check is performed.  An accumulated value of 75 appears to be a 1% chance, while a value of 175 appears to be equivalent to a 100% chance.  The specifics of the algorithm remain unclear.
 * Duration is the length of time required to pass without consuming the drug for the accumulated magnitude to be reset to zero.


 * An easy way to avoid addiction is to save before consuming said substance. If you become addicted, simply load from the earlier save. This will not work if your addiction chance has reached 100%.


 * 1Note this only applies to plain mentats, the other variations (berry, orange, and grape) are non addictive.

Fallout: New Vegas
Practically, due to all the new chems in F:NV, most of them clearly addictive, the addictions seem to have no negative effects*. Just a message "You have become addicted to ". It is unknown whether that is simply just a glitch or that the developers did not intend any negative effects to addictions and respective withdrawals.


 * This is not true. I suffered negative effects from withdrawal, but it seemed to have disapeared by itself over time. (not sure if it disapeared permanently after a dose of Fixer)

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