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For the addiction mechanism in Fallout 76, see Addiction (Fallout 76). |
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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[]
| Type | Fallout | Fallout 2 | Fallout 3 | Fallout: New Vegas | Fallout 4 | Fallout 76 | Fallout: The Roleplaying Game | Fallout Tactics |
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| After Burner addiction | 
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| Alcohol addiction |
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| Ant nectar addiction |
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| Buffout addiction |
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| Buzzbites addiction |
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| Calmex addiction |
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| Daddy-O addiction |
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| Day Tripper addiction |
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| Formula P addiction |
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| Fury addiction |
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| Happy pie addiction |
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| Hydra addiction |
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| Jet addiction |
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| Med-X addiction |
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| Mentats addiction |
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| Mutie addiction |
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| Nuka-Cola addiction |
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| Nuka-Cola Quantum addiction |
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| Overdrive addiction |
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| Psycho addiction |
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| Rebound addiction |
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| RadAway addiction |
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| Steady addiction |
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| Tobacco addiction |
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| Tragic addiction |
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| Turbo addiction |
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| Ultrajet addiction |
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| Voodoo addiction |
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| X-cell addiction |
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- 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[]
| ITEM | RISK | DELAY | DURATION | FORM | WITHDRAWAL EFFECTS |
|---|---|---|---|---|---|
| Alcohol | 5% | 2 days | 7 days | Alcohol addiction | -1 AG, -1 CH |
| Buffout | 25% | 2 days | 7 days | Buffout addiction | -2 ST, -2 EN, -3 AG |
| Jet | 50% | 2 days | Until cure is taken | Jet addiction | -1 ST, -1 PE, -1 Action Point |
| Mentats | 15% | 7 days | 7 days | Mentats addiction | -3 IN, -2 AG |
| Nuka-Cola | 10% | 30 minutes | 7 days | Nuka-Cola addiction | N/A: "You crave more Nuka-Cola"[1] |
| Psycho | 20% | 7 days | 7 days | Psycho addiction | -2 IN |
| RadAway | 10% | 10 days | 7 days | RadAway addiction | -20 Radiation Resistance |
| Tragic | Cut from Fallout 2. | Cut from Fallout 2. | Cut from Fallout 2. | Tragic addiction | N/A: "You feel a burning desire to open another box of Tragic cards" |
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.
Fallout Tactics[]
| ITEM | RISK | DURATION | FORM | WITHDRAWAL EFFECTS |
|---|---|---|---|---|
| After Burner gum | 50% | 2 days | After Burner addiction | -3 ST, -3 PE, -2 Max AP |
| Buffout | 25% | 2 days | Buffout addiction | -2 ST, -2 EN, -3 AG |
| Happy Pie | 0% | 10 days | Happy Pie Addiction
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-1 PE, -2 IN |
| Mentats | 15% | 7 days | Mentats addiction | -4 PE, -4 IN, -4 CH |
| Mutie | 10% | 10 days | Mutie addiction | -20 Radiation Resistance |
| Nuka-Cola | 10% | 7 days | Nuka-Cola addiction | N/A: "You crave more Nuka-Cola"[1] |
| Psycho | 20% | 7 days | Psycho addiction | +1 IN, -3 AG, -25 Damage Resistance |
| RadAway | 10% | 10 days | RadAway addiction | -20 Radiation Resistance |
| Voodoo | 20% | 1 day | Voodoo addiction | +1 PE, -1 CH, -1 IN |
Unlike Fallout and Fallout 2, chems do not have an addiction delay, instead immediately applying the effect after the chem's duration has expired. The Psychotic perk reduces the withdrawal effects from Psycho, while the Chem Resistant and Chem Reliant traits behave as they do in the previous games.
Alcohol addiction is present in Tactics, but is completely cut: all beverages that could provide it instead have zero addiction chance and no penalties set up, instead giving an unseen Drunk status for 1 minute. Happy Pies were also set up to be addictive, however the effect was left disabled in the final game with a chance of 0%. While Mutie has an addiction, it will not indicate the player is currently addicted outside of the stat detriment due to no indicator flags being set up for it. Given it shares the same effect and duration as RadAway, this may be an unintended bug.
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). Owning a house in either Megaton or Tenpenny Tower enables no-cost addiction removal if the My First Laboratory house improvement is installed. Also, the healing archways in Mothership Zeta include removing addictions as part of their healing effects.
Usage Monitor[]
In addition to standard addiction chance, certain items have an additional tracker value which builds up with each subsequent use of a substance. Internally, this effect is referred to as the "Usage Monitor Effect," or "UMON." Each use of an item adds its UMON value to the total UMON value and remains a part of it until its specified time limit elapses, at which point it is removed from the current running total. An accumulated value of 75 seems to equate to +1% addiction chance (added, not multiplied - % is percentage points, not percent), whereas a value of 175 seems to be equivalent to a +100% chance.
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. UMON is an accumulating chance of addiction. See Usage Monitor 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.
| ITEM | CLASS | RISK | DURATION | UMON | WITHDRAWAL EFFECTS |
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| Buffout | Chems | 10% | 30 hours | 30 | -1 EN, -1 ST |
| Jet | Chems | 20% | 30 hours | 30 | -1 AG, -1 CH |
| Ultrajet | Chems | 20% | 48 mins | 12 | -2 AG, -1 PE, -1 ST |
| Mentats¹ | Chems | 5% | 30 hours | 30 | -1 IN, -1 PE |
| Beer | Alcohol | 5% | N/A | N/A | -1 AG, -1 CH |
| Vodka | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Wine | Alcohol | 5% | N/A | N/A | -1 AG, -1 CH |
| Psycho | Chems | 10% | 30 hours | 30 | -1 EN, -1 PE |
| Med-X | Chems | 10% | 30 hours | 30 | -1 AG, -1 IN |
| Scotch | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Whiskey | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Ant nectar² | Chems | 5% | 1 hour | 20 | -2 ST |
| Nuka-Cola Quantum | Food | 10% | 48 mins | 12 | -1 CH, -15 Radiation Resistance |
- ¹Only applies to plain Mentats, the other variations (Berry Mentats, Orange Mentats, and Grape Mentats) are nonaddictive.
- ²Only applies to plain ant nectar, the other variation (Fire ant nectar) is nonaddictive.
Fallout: New Vegas[]
New drugs and addiction-causing substances are found in the Mojave Wasteland. Addiction is permanent unless seen to by a doctor. Fixer will remove the player character's addictions permanently, the only drawback being the application of a temporary "nausea" debuff. With Old World Blues, the Sink Auto-Doc cures addictions for free as part of the basic physical exam. The Logan's Loophole trait prevents addiction entirely at the cost of limiting the Courier to level 30. Perks in Fallout: New Vegas such as Chem Resistant, Brainless and Old World Gourmet reduce addiction chance.
| ITEM | ADDICTION | CLASS | RISK | DURATION | UMON | WITHDRAWAL EFFECTS |
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| Buffout | Buffout addiction | Chems | 10% | 30 hours | 30 | -1 EN, -1 ST |
| Jet | Jet addiction | Chems | 20% | 30 hours | 30 | -1 AG, -1 CH |
| Ultrajet | Ultrajet addiction | Chems | 20% | 0.8 hours (48 minutes) | 12 | -2 AG, -1 PE, -2 ST |
| Mentats | Mentats addiction | Chems | 5% | 30 hours | 30 | -1 IN, -1 PE |
| Beer | Alcohol addiction | Alcohol | 5% | N/A | N/A | -1 AG, -1 CH |
| Vodka | Alcohol addiction | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Wine | Alcohol addiction | Alcohol | 5% | N/A | N/A | -1 AG, -1 CH |
| Psycho | Psycho addiction | Chems | 10% | 30 hours | 30 | -1 EN, -1 PE |
| Med-X | Med-X addiction | Chems | 10% | 30 hours | 30 | -1 AG, -1 IN |
| Scotch | Alcohol addiction | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Whiskey | Alcohol addiction | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Ant nectar | Ant nectar addiction | Chems | 5% | 1 hour | 20 | -2 ST |
| Fire ant nectar | none | Chems | 5% | 1 hour | 20 | -2 ST |
| Irradiated Scotch | Alcohol addiction | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Irradiated whiskey | Alcohol addiction | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Moonshine | Alcohol addiction | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Jake Juice | Alcohol addiction | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Coyote tobacco chew | Tobacco addiction | Chems | 10% | 30 hours | 30 | -1 PE, -1 CH |
| Party Time Mentats | Mentats addiction | Chems | 15% | 30 hours | 30 | -1 IN, -1 PE |
| Rebound | Jet addiction | Chems | 20% | 30 hours | 30 | -1 AG, -1 CH |
| Slasher | Psycho addiction | Chems | 20% | 30 hours | 30 | -1 EN, -1 PE |
| Rocket | Jet addiction | Chems | 30% | 30 hours | 30 | -1 AG, -1 CH |
| Irradiated beer | Alcohol addiction | Alcohol | 5% | N/A | N/A | -1 AG, -1 CH |
| Hydra | Hydra addiction | Chems | 10% | N/A | N/A | -3 EN |
| Turbo | Turbo addiction | Chems | 20% | N/A | N/A | -2 AG |
| Absinthe | Alcohol addiction | Alcohol | 10% | N/A | N/A | -1 AG, -1 CH |
| Dixon's whiskey | Alcohol addiction | Alcohol | 50% | N/A | N/A | -1 AG, -1 CH |
| Dixon's Jet | Jet addiction | Chems | 50% | 30 hours | 30 | -1 AG, -1 CH |
| Steady | Steady addiction | Chems | 80% | 30 hours | 30 | -1 ST, -1 AG |
Sierra Madre martini 
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Alcohol addiction | Alcohol | 15% | 30 hours | 30 | -1 AG, -1 CH |
Bugs[]
Addictions in effect at the conclusion of the add-on Dead Money may become incurable.- Fixer can permanently remove addictions due to a scripting error.
- 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.
Fallout 4[]
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Missing data (addiction odds, item use counter timer)
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In Fallout 4, addictions can be viewed on the STAT page of the Pip-Boy by choosing Show Effects. Repeated use of a substance within a short period of time may lead to the player developing an addiction.[citation needed]
- On average, it takes around three repeated uses in order to develop an addiction.
- Addiction withdrawal will impact the player cosmetically, such as giving them a slightly emaciated appearance (though this is less pronounced if large or muscular body types were selected during character creation).[citation needed]
- The Chem Resistant and Party Girl/Party Boy perks can render the player immune to specific addictions.
- The Junkie's legendary effect increases weapon damage for each addiction negatively affecting the player.
- Dark Craving does not count as an addiction for this effect.
- Addiction can be cured either by visiting a doctor or by using certain aid items such as:
- Addictol - Widely available from medics or merchants.
- Radscorpion egg omelette - Craftable at a cooking station.
- Refreshing beverage - Craftable at a chemistry station.
| Fallout 4 addiction | ||||
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| Addiction | Effects | Chance | Source | FormID |
| Alcohol addiction | Charisma -1 · Agility -1 | 15-25% | Alcoholic beverages¹ | 00245EF1 |
| Buffout addiction | Strength -1 · Endurance -1 | 25-35% | Buffout ·Buffjet ·Bufftats | 00033066 |
| Calmex addiction | Agility -2 · Perception -2 | 35% | Calmex ·Calmex Silk | 00246BF5 |
| Daddy-O addiction | Intelligence -1 · Perception -1 | 35% | Daddy-O | 00245EFF |
| Dark Craving | Can't satiate hunger with food (can satiate with corpses), become hungry every 12 hours rather than 6, only possible hunger states are satisfied and ravenous (intermediate states are ignored). | 100% | Corpses | 000008C2 |
| Day Tripper addiction | Luck -1 · Charisma -1 | 35% | Day Tripper | 00245F02 |
| Fury addiction | Strength -1 · Perception -1 | 35% | Fury | 00246BFE |
| Jet addiction | Agility -1 | 25% | Jet · Jet Fuel · Ultra jet | 00245F05 |
| Med-X addiction | Agility -1 · DR -10 | 25% | Med-X | 00245AC5 |
| Mentats addiction | Charisma -1 | 10% (may be 25% for some variants; Berry and Grape contradict the addiction article) | (Berry, Grape, Orange) Mentats | 00245EF3 |
| Overdrive addiction | Strength -1 · Agility -1 | 35% | Overdrive | 00245F09 |
| Psycho addiction | Strength -1 · DR -10 | 25-35% | Psycho · Psycho jet · Psychobuff | 00245EFA |
| X-cell addiction | SPECIAL -1 | 35% | X-cell | 00245EFC |
- ¹ - Alcohol: Beer, Bobrov's Best moonshine, bourbon, rum, vodka, whiskey, wine, Gwinnett ale, Gwinnett brew, Gwinnett lager, Gwinnett pale, Gwinnett pilsner, Gwinnett stout, Nuka-Bombdrop, Nuka-Cola Dark (Nuka-World), and all ice cold variations.
Fallout 76[]
- Addiction can be cured by using certain consumables such as:
- Addictol - cures all addictions (found while exploring Appalachia),
- Radscorpion egg omelette - randomly cures 1 addiction (craftable at a cooking station),
- Tasty radscorpion egg omelette - cures all addictions (craftable at a cooking station).
- The Chem Resistant and Professional Drinker perks can render the player character immune to addictions.
- The Junkie's legendary effect uses each addiction to increase the weapon's damage by 10% per addiction, up to a maximum of 50% for 5 addictions. Addictions suppressed by using the related consumable do not count towards the bonus.
Fallout: The Roleplaying Game[]
| Fallout: The Roleplaying Game addiction | ||||
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| Addiction | Effects | Effect rolls to become addicted | ||
| Alcohol addiction | CHA and AGI tests difficulty increased by +1 | Amount of alcohol | ||
| Buffout addiction | STR and END tests difficulty increased by +1 | 2 (Buffout) 1 (other variants) | ||
| Calmex addiction | Suffer complications on AGI tests on all rolls of 18 or higher | 1 | ||
| Daddy-O addiction | PER and INT tests difficulty increased by +1 | 1 | ||
| Day Tripper addiction | CHA and LUK tests difficulty increased by +1 | 1 | ||
| Fury addiction | STR and PER tests difficulty increased by +1 | 1 | ||
| Jet addiction | AGI tests difficulty increased by +1 | 2 (Jet) 3 (Ultra jet) 1 (Jet fuel) | ||
| Med-X addiction | AGI tests difficulty increased by +1, and suffer +1d6 additional damage from all physical attacks | 2 | ||
| Mentats addiction | CHA tests difficulty increased by +1 | 3 (Mentats) 2 (flavored mentats) | ||
| Overdrive addiction | STR and AGI tests difficulty increased by +1 | 1 | ||
| Psycho addiction | STR tests difficulty increased by +1, and suffer +1d6 additional damage from all physical attacks | 2 (Psycho) 1 (other variants) | ||
| X-cell addiction | All test difficulty increased by +1 | 1 | ||
Featuring a plethora of chems, many of these chems are addictive just like in prior titles. When a player takes an addictive chem, they must roll a number of d6s equal to the number of doses they have taken the current session. If the player rolls a number of Effects that equals or exceeds that chem's addiction number, they have become addicted to that chem. Each chem lists the addiction effects in their descriptions in the corebook.
The same goes for Alcohol. All alcoholic drinks have the same effect: Until the end of the scene, the player may re-roll 1d20 on STR and CHA tests, but increase the difficulty of INT tests by +1. After drinking the beverage, the player must attempt an addiction roll like for chems but the DC equals the number of all alcoholic drinks consumed during the session. If two or more Effects are rolled, they are addicted, and add +1 to the difficulty of CHA and AGI tests while not under the effects of an alcoholic drink.
The Party Girl/Party Boy perk renders players immune to alcohol addiction.