Addiction

Addiction is a group of negative effects acquired from repeated substance use. It represents a dependency to a substance, or activity, meaning that one's body (or mind) is in need of a regular dose in order to avoid withdrawal symptoms.

Overview

 * Addiction can happen from using too many chems. An addict suffers withdrawal symptoms that can cause ill effects when a drug wears off. Many substances in the Fallout games are addictive. Each chem has a chance of addiction. One of the most addictive chems is Jet.
 * For Fallout 1 and Fallout 2, withdrawal effects occur after becoming addicted and going for some amount of time without using that chem. For non-Jet addictions, addiction lasts seven days from the onset of the withdrawal effects (nine days of non-use), while Jet addiction can only be cured with the Jet antidote.
 * Certain NPCs have addictions, not just the player character.

Types of addiction

 * ¹All alcohols are flagged to use this addiction in Tactics, but have a chance of 0.
 * ²Only used in game files; possible bug.
 * ³Cut from the game.

Fallout and Fallout 2
Selecting the Chem Resistant trait results in a 50% resistance to the addictive effect of individual chems, while the Chem Reliant trait doubles it, but with faster recovery. Chems which normally have a 10% addiction rate will be reduced to a 5% rate. If the trait is taken, however, chems will only last half as long.