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%% Trope was declared Administrivia/NoRealLifeExamplesPlease via crowner by the Real Life Maintenance thread: https://tvtropes.org/pmwiki/crowner.php?crowner_id=ju8ngqwd
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%% Commented-out examples are zero-context examples. Please do not re-add without adding context.
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->''"I'm a functioning alcoholic. The trick is not to get hung up on the 'alcoholic', but celebrate the 'functioning' part of the sentence."''
-->-- '''Nathan Ford''', ''Series/{{Leverage}}''

%% One quote is sufficient. Move excess quote to the Quotes tab.

Because DrugsAreBad, the world of fiction is famous for treating drug addicts as feeble, broken people living in disheveled apartments (or in a worst-case scenario, [[CrazyHomelessPeople homeless]]) and constantly muttering to themselves. However, there has been a general trend lately towards portraying addicts in a different light. These drug users, with addictions just as serious, can lead very normal lives, at least to the strangers on the street. They can wake up in the morning, go to work, have a family, and interact socially without any noticeable problems, as long as they are getting their "fix" when necessary.

Simply put, the addiction does not entirely dictate this person's actions. Typically, this kind of addict can go long periods of time without getting their "medicine" and doesn't depend on their drugs as a "crutch". Often, this is because they can always get the drug when they need it or have the willpower to keep themselves from getting out of control. The milder the drug, the more available it is, and the less taking it affects reasoning and decision-making, the more likely the addict is to stay functional.

In RealLife, these kinds of addicts can sometimes go their entire lives without ever becoming dysfunctional. Fiction, on the other hand, almost always treats them as ticking time-bombs, slowly working up to the one event that will send them over the edge. While crossing the line into dysfunctional territory definitely happens in RealLife as well, the key difference is that fictional sources treat this as inevitable.

Could be justified because fiction typically involves putting characters through unusual, dramatic, and stressful situations which do increase the likelihood of an addict becoming dysfunctional. Also, {{conservation of detail}} comes into play. It's usually not worth mentioning that the character has an addiction if it plays no role in the plot and tells us nothing important about the character.

It's common for none of the other characters in the work to [[DarkSecret even know]] that there is an issue until it becomes a severe problem. It is also commonly used as TheReveal for a particular character on a VerySpecialEpisode, where it is revealed that they have been a functional addict throughout the series and are now coming to terms with it.

Technically, the most common substances used by functional addicts are [[MustHaveCaffeine caffeine]] and [[MustHaveNicotine nicotine]], both of which are easy to obtain and have few immediate adverse effects. But because both of these substances have different roles in society than more heavily intoxicating drugs, their usage in storytelling is different, too; so examples of functional addicts who depend entirely on one or both of these substances should go on the corresponding pages.

Compare DarkSecret, for characters with any kind of sinister secret in hiding, and DrugsAreBad, for when problematic drug use is the ''only'' kind of drug use. Also compare/contrast AddledAddict, when drugs are taking their toll. Compare RecoveredAddict, who may cycle into and out of addiction.

----
!! Examples:
[[foldercontrol]]

[[folder:Anime & Manga]]
* ''Manga/ChainsawMan'': Kishibe, despite being a severe alcoholic, has no lasting repercussions that impede him in the slightest as a fighter.
* ''Manga/CopernicusBreathing'': Bird's Nest takes drugs when he is overwhelmed by the memory/ghost of his little brother Michel and is borderline DrivenToSuicide.
* ''Manga/ACruelGodReigns'': Jeremy becomes a drug addict and prostitute to help him cope with the Post-Traumatic Stress Disorder he suffers from due to months of torture and rape at the hands of his stepfather. So not quite "functional", but more functional than he would have been.
* ''Manga/JoJosBizarreAdventure'':
** ''[[Manga/JoJosBizarreAdventureGoldenWind Golden Wind]]'': In ''Literature/PurpleHazeFeedback'', Angelica's Manic Depression implant drugs that numb the pain of her illness, but she's gotten hooked on them as a result; she's still happier that she has them, even though she is kind of crazy.
** ''[[Manga/JoJosBizarreAdventureStoneOcean Stone Ocean]]'': Sports Maxx has an addiction to heroin but seems to operate with the same calculative ruthlessness as he did outside the prison walls. Although, it certainly doesn't help him with his truly sadistic personality, either.
** ''[[Manga/JoJosBizarreAdventureTheJoJoLands The JoJoLands]]'': Usagi worries the other members of the heist team since he was seen earlier taking a drug pack from Paco, but Meryl May reassures them that he's perfectly functional despite being a drug addict.
* ''Manga/MaidenRose'': Klaus exhibits the {{deconstructed|Trope}} form of this trope. He is implied to have been addicted to morphine in the past, so once he is injured and needs it to help enhance his performance, it's not very effective and he has to increase dosages. As one would expect, he doesn't stop using it after that and it's still up in the air whether he'll be able to curb the addiction again or not.
* ''Manga/MissKobayashisDragonMaid'': Kobayashi drinks a lot of beer (and is often seen suffering from hangovers), but it never interferes with her job as a programmer or her role as Kanna's ParentalSubstitute.
* ''Anime/NeonGenesisEvangelion'': Misato drinks ''a lot'' of alcohol, to the point of having a fridge full of nothing but beer. However, it's never shown to interfere with her job, where she's actually quite competent and is one of the (relatively speaking) more well-adjusted members of an extremely dysfunctional cast. She also seems to quit near the end of the show, [[AddictionDisplacement replacing alcohol with coffee and cigarettes]].
* ''Manga/PrivateActress'': Ruriko Daichi is an extremely famous and talented actress. She's also a very bitter LadyDrunk, which is driving people away from her.
* ''Anime/TrigunStampede'': Roberto drinks enough to appear red in the face in many scenes, but it doesn't seem to hinder his movement or sense of judgment. Even while speaking in a slurred and tipsy manner, he's able to pick up just fine that Vash is clearly hiding something behind his goofy behavior.
[[/folder]]

[[folder:Comic Books]]
* In ''ComicBook/AllRoads'', the graphic novel prequel to ''VideoGame/FalloutNewVegas'', readers follow the story of Chance, a Great Khan tribal who has fallen into drug abuse due to the trauma of the Bitter Springs Massacre. Despite being constantly and concerningly doped-up on high-end narcotics, he remains an incredible fighter; though he has his share of issues they mainly stem from his trauma rather than his addiction.
* ''ComicBook/BakerStreet'': According to Inspector Pinner, even when she was addicted to cocaine, Sharon Ford was still the best detective in CID.
%%* In ''ComicBook/BlueIsTheWarmestColor'', [[spoiler:Clémentine, who's an English language teacher, becomes one after being dumped by Emma for cheating on her.]] (Administrivia/ZeroContextExample; what is she addicted to, and how does it, or rather does not, affect her life?)
* In ''ComicBook/{{Chassis}}'', Covergirl is in constant pain and addicted to painkillers as a result of the accident that nearly crippled her. However, she is still one of the top drivers in the Aero-run despite her addiction.
%%* In ''ComicBook/{{Cruelty}}'', Reis Northcotte's mother is definitely dysfunctional, but Reis himself fits the bill. The facade is beginning to crack, however. (Administrivia/ZeroContextExample; what is she addicted to, and how does it, or rather does not, affect her life?)
* Dynaman, the Tex Thompson-created Franchise/{{Superman}} expy in ''ComicBook/TheGoldenAge'', is shown to be a cocaine addict long before it is revealed that [[spoiler:he is actually Adolf Hitler's brain transplanted in Daniel Dunbar's body]], yet it doesn't affect his abilities as a superbeing, as he can still take quite a beating in the final massive superhero confrontation before Alan Scott as Franchise/GreenLantern starts turning him into hamburger.
* ''ComicBook/IronMan'': Despite his far more well-known breakdowns, Tony Stark actually spent a lot of time beforehand as a ''functioning'' alcoholic. Of course, as is typical of works of fiction, that went downhill so steeply that he [[DespairEventHorizon slammed straight into rock bottom]]. ''Hard.'' Granted, Tony's gone through [[TraumaCongaLine a lot of awful shit]], so his descent into [[TheAlcoholic full-blown alcoholism]] wasn't unjustified.
* Derrick Hinch of ''ComicBook/{{Revival}}'' smokes weed regularly during his downtime, but he's holding down a job as a freelance tattoo artist, maintaining relationships with his girlfriend and son, and is very useful to Dana on high-risk missions. None of that redeems him in Dana's eyes due to the addiction and his lack of ambition.
* Cade Skywalker in ''ComicBook/StarWarsLegacy'' seems to do fairly well despite his death stick addiction. Especially since many users don't survive too long once they're addicted.
* Tarn of the Decepticon Justice Division in ''ComicBook/TransformersMoreThanMeetsTheEye'' is addicted to transformation but carries out his duty (torturing and killing Decepticon criminals) nonetheless. Somewhat subverted in that it causes him to rapidly burn through transformation cogs, which could lead to death [[spoiler:if he wasn't getting replacements from Pharma]].
[[/folder]]

[[folder:Fan Works]]
* In ''[[https://www.fanfiction.net/s/3665921/53/Black-Flames-Dance-In-The-Wind-Rise-of-Naruto Black Flames Dance in the Wind: Rise of Naruto]]'', Asuma reveals to Naruto that in his youth he took a SuperSerum that makes you far stronger but also kills you if you don't take it daily. His cigarettes are actually laced with minute traces of the drug, just enough to keep him from suffering withdrawal but not enough to continue improving him.
* ''Fanfic/{{Eugenesis}}'' has Springer, a former junkie who's attempting to wean himself off the normal drugs he used to take and is also dosing up the Franchise/{{Transformer|s}} equivalent of steroids to try and keep up on the battlefield. [[spoiler:He [[SurprisinglyRealisticOutcome falls off the wagon at the worst possible time]] and ends up OD'ing just as Autobot City is swarmed by Quintessons.]]
%%* Howard is described as going through a period of this in ''[[Fanfic/ForeverCaptain The Hemingway Trip]]''. (Administrivia/ZeroContextExample; what is he addicted to, and in what way is he still functional?)
* ''Fanfic/NewTamaran'': ComicBook/{{Supergirl}} is a sex addict who's proudly banged almost every other young hero (and heroine) in the world. This doesn't stop her from being an inspiring superheroine or a good friend. She also harbors romantic feelings for [[Characters/SupermanJimmyOlsen Jimmy Olsen]] and claims that she would gladly give up her promiscuity to be an OfficialCouple with him.
* ''[[https://archiveofourown.org/works/38962401 Raise Your Glass]]'': [[Manga/JoJosBizarreAdventureGoldenWind Leone Abbachio]] is a function alcoholic, able to control his intake thanks to his own resolve and the help of his husband Bruno. He was able to remain functioning as both a jaded police man and a efficient mafioso that it took a movie drinking game for him to realize he had a problem when he was the only one out of a group of six men still conscious when watching ''Film/TopGun''
* ''Fanfic/ShipsAhoy'': Just like in canon, Oprah has an addiction to juice boxes, and Olesya, her boss, has an addiction to jellybeans. Both addictions are likened to substance abuse by Olesya himself, although it doesn't appear to be at the point of concern, and both girls practice moderation. ''Fanfic/PatternsOfThePast'' expands on it by having Olesya state that even after she retired from Odd Squad, she could never kick her jellybean addiction and that she's a "horrible quitter". Oprah counters with her juice bar, and Olesya tells her that she definitely doesn't see her juice addiction going away anytime soon, which they both laugh at.
* ''Fanfic/SugarPlums'': The main character Ume is mentioned in passing to be dependent on sleeping pills to get more than few hours of sleep a night because of constant nightmares [[ShellShockedVeteran caused by her experiences]]. This isn't treated as a big deal by anyone until [[spoiler:she also starts using antidepressants, but neglects to tell most of her companions for fear that they'll think she's broken. Not only do said antidepressants cause negative side effects (like headaches and nausea) when she uses jutsu (because chakra is linked to emotions, so chemicals that regulate emotions messes with the drug) but after being heavily injured in a fight and going unconscious for several days she almost dies in the hospital because she starts [[SurprisinglyRealisticOutcome suffering seizures from withdrawal]].]]
* In ''Fanfic/YourAlicornIsInAnotherCastle'', Bowser is a fairly unusual variant of this trope. He is required by destiny to kidnap princesses, and when he tried to avoid doing so he started suffering from something similar to withdrawal symptoms. However, he has since discovered a loophole: his destiny requires that he kidnap princesses, but it does ''not'' require that the princesses in question be unwilling to be kidnapped or that he hang onto them once they've been kidnapped. And it turns out that quite a few princesses and other authority figures throughout the multiverse will pay handsomely to be temporarily kidnapped in order to have an ironclad excuse to lay aside their duties and just ''relax'' for a few days.
[[/folder]]

[[folder:Film -- Animation]]
* Evelyn in ''WesternAnimation/Incredibles2'' is implied to be an alcoholic, but she's functional nevertheless.
[[/folder]]

[[folder:Film -- Live Action]]
* ''Film/TheAssistant'': It's [[ShowDontTell implied]] that Jane's powerful BadBoss is one due to the sheer volume of prescription medication she loads into his office desk. She even has to pick syringes from his garbage to put into medical waste bags.
* The title character in ''Film/TheBadLieutenantPortOfCallNewOrleans'', to the nth degree -- he spends the entire movie high on Vicodin, heroin, marijuana, crack cocaine, regular cocaine, or more than one at once. He's still a good cop and even a badass, but always in a believable way (i.e., not an overblown action movie way).
* ''Film/BetterLivingThroughChemistry'': Doug Varney is addicted to pharmaceutical drugs, but manages to fulfill his obligations despite his addiction, although it's clearly taking a toll on him. It helps that, as the chief pharmacist, he knows the effects of the drugs and tries to balance them out to avoid lasting damage.
* ''Film/CarlitosWay'': David Kleinfeld is a mob lawyer and frequent cocaine user. He starts off the film apparently able to keep his act together, but he rapidly goes downhill into a spiral of ego, paranoia, and making incredibly rash and foolish mistakes with the various criminals he surrounds himself with. It doesn't end well for him.
* By ''Film/DieHardWithAVengeance'', John [=McClane=] is a near-alcoholic, and as a result, almost always has a hangover. While it causes him no small amount of suffering, he manages to remain fully capable of kicking the bad guy's ass.
* ''Film/TheExpendables'': Gunnar is heavily suggested to be a junkie (a heroin addiction, presumably, based on the typical understanding of the word "junkie", but his exact addiction is a mystery), which heavily clouds his sense of better judgment and seriously afflicts his personality, yet he's still able to take on Ying Yang, and would have beaten him in one-on-one combat had Barney not interfered.
* [[{{Bandito}} El Indio]], the BigBad of ''Film/ForAFewDollarsMore'', spends the entire film in an opium-induced haze. While it definitely affects his personality, it doesn't seem to impair his planning, and he remains an efficient, competent, and frightening villain, who stays one step ahead of [[BountyHunter Monco]] and [[ColonelBadass Colonel Mortimer]] until the final act of the movie.
* ''Film/GhostsOfMars'': Melanie Ballard is a drug addict, but manages to hold down a job as a police officer. Ironically, her drug use ends up saving her life. When she's possessed by a Martian ghost, Creator/JasonStatham's character gives her a puff of her own drug. Melanie can take it, the alien ghost can't and bails out. Compare one of the thugs, who is addicted to a different drug (a highly-nitrated compressed air) that results in him cutting off his own finger and, eventually, dropping a grenade at his own feet. Definitely ''not'' an example.
* In ''Film/ItsyBitsy'', Kara is still functional in her job, but she gets caught stealing pain pills from Walter, and Sheriff Jane notes that she's showing the signs of an addict jonesing for their fix.
* Michael of ''Film/LifeOfTheParty'' has managed to keep his life together pretty well for being drunk through a good bit of it. However, the movie opens as his attempts start to fall apart.
* ''Film/{{Looper}}'': Joe is efficient at his job in spite of his youthful addiction to the "eyedrop drug". His older self got help from his wife in getting off of the stuff.
* ''Film/TheMagnificentSeven2016'': Joshua Faraday's a heavy day-drinker while Goodnight Robicheaux and Billy Rocks smoke opium-laced cigarettes, but that doesn't stop any one of them from being three members of a BadassCrew.
* ''Film/MinorityReport'': John Anderton has become addicted to "Neuroin" as a means of dealing with the loss of his son [[spoiler:and his being framed for future-murder]]. He is able to hide this from all but his closest acquaintances, and it does not seem to hinder his ability to function as a cop. It's implied that New hEROIN is specifically designed to produce functional addicts. The same drug is also responsible for the creation of the precogs, whose mothers were addicts.
* Molly from ''Film/MollysGame'' starts abusing drugs and alcohol to cope with the stress and pressure of running her games. She holds it on a leash so that she is never visibly out of control to her clients of employees, but during the trial, she admits that her judgement was seriously compromised and that's why she made the blunders that brought everything down.
* Laura from ''Film/NathansKingdom'' is an opioid addict, but she still manages to hold down a job (at least until Nathan unintentionally gets her fired).
* ''Film/{{Ophelia}}'': Gertrude has become addicted to a tonic that her twin makes her. It doesn't appear to stop her from functioning as Queen of Denmark though.
* ''Film/PainAndGlory'': Alberto is clearly a heroin addict; he smokes it every day and at one point he calls his heroin use "slavery". But a regular heroin habit hasn't interfered with Alberto's cushy lifestyle in a nice house, and Alberto can also manage his heroin use, throttling back when he needs to get ready to put on a one-man show of Salvador's essay.
%%* Implied to be the case with Johns in ''Film/PitchBlack'', who steals morphine from the medkit and injects it into his eyesocket, possibly to avoid leaving visible needle marks. In the Director's Cut of the film, he explains that he got hooked on heroin due to chronic pain from a piece of metal lodged in his spine after a fight with Riddick. (Administrivia/ZeroContextExample; give a specific example of how he's still functional)
* ''Film/SchindlersList'': Oskar Schindler is shown to be a very heavy drinker. He uses this to his advantage by taking Nazi officers out in the town, matching them drink for drink, and staying level-headed while the Nazis get sloppy and easily manipulated.
* ''Film/{{Superdome}}'' has football player Dave Walecki, whose addiction started with painkillers for his bad knee and then expanded into other types of prescription drugs. It doesn't stop him from playing football, but it's bad for his marriage.
* In the film adaptation of ''Literature/{{Trainspotting}}'' and [[Film/T2Trainspotting its sequel]], this is what Sick Boy claims to be, first with heroin and then with cocaine. How functional he is actually is left ambiguous.
* ''Film/TropicThunder'': Creator/JackBlack's character Jeff Portnoy, who is a hardcore drug addict but also has a thriving career as a slapstick comedian in the movies. This works fine so long as he has access to drugs, but works less well when the troupe of actors gets cut off in the jungle and Jeff goes into withdrawal.
* ''Film/{{Valentine}}'': Adam Carr has a drinking problem but still holds a consistent job as a sports writer. He's also [[spoiler:a highly competent and dangerous SerialKiller, and it's heavily implied that he's been pretending to be more of a drinker than he usually is to [[ObfuscatingStupidity ward off suspicion]].]]
* "Teardrop" in ''Film/WintersBone''. He's competent and level-headed despite being hooked on meth.
* Gary King from ''Film/TheWorldsEnd'' is unquestionably an alcoholic, and harder drugs are implied. While he literally prioritizes getting drunk over his own survival at several points, [[spoiler:a hint at his suicidal tendencies]], he still manages to go hand-to-hand with the [[AlienInvasion Blanks]] and maintain his [[ToxicFriendInfluence toxic charisma]].
[[/folder]]

[[folder:Literature]]
%%* In ''[[Literature/AddictedSeries Addicted]]'', Loren and Lily seem like this at first, but it soon becomes clear that their addictions -- alcohol and sex, respectively -- rule their lives and ruin most of their relationships outside of each other. (Administrivia/ZeroContextExample; what about them makes them seem functional?)
* ''Literature/ChristianeF'': Christiane is a drug addict and a prostitute, but for all that she continues to attend school every morning (in Germany at the time, school was only half a day).
* ''Literature/DannyTheChampionOfTheWorld'': Mr. Snoddy is a kind, well-regarded teacher who's always sipping from a glass of "water", which Danny discovers is actually gin.
* ''Literature/{{Discworld}}'' black ribbon vampires specifically try to become this. Human blood isn't strictly necessary for Discworld vampires to survive, with animal blood being a perfectly serviceable if distinctly unsatisfying substitute. To help them be better neighbors and stop mobs from forming every few weeks, [[TheTeetotaler Black Ribboners]] take up drinking animal blood and shift the leftover addiction to a more benign hobby -- shown examples include photography, politics, and police work/spying. It doesn't matter what they're doing, they're all addicted to something.
* In ''Literature/DrugstoreInAnotherWorld'', protagonist Reiji's delicious and extremely effective "super (energy) potions" accidentally make functional addicts out of the entire town of Kalta. Out of the main cast, Reiji's beloved assistant, Noella, and the Red Cat Brigade's captain, Annabelle, are the ones most visibly addicted to the stuff, either sneaking from the backroom stock or nearly driving her organization to financial ruin from supporting her habit. However, aside from those neither show any side-effects or issues from excessive long-term consumption, which is especially notable as super (energy) potions are described as magical caffeinated energy drinks like Creator/RedBull.
* ''Franchise/{{Dune}}'' gives us the Spice Melange: A FantasticDrug found only on Arrakis that extends life and heightens awareness to supernatural levels, allowing certain individuals to [[JunkieProphet see into the future.]] Its use by the Spacing Guild for interstellar navigation, its exclusivity to Arrakis, its fatal withdrawal symptoms and the extreme danger of obtaining the stuff in the first place makes Spice the most valuable substance in the universe. In other words: ''The Spice must flow.''
** Guild Navigators require so much Spice to safely guide their passengers between systems that they literally ''swim'' in the stuff, mutating over time until they resemble fish-people more than anything else.
** Mentats, who are humans trained to think like supercomputers to bypass a ban on artificial intelligence, are known to drink Sapho: a drug used to accelerate one's thought process that also stains the lips a deep red color.
* In ''Literature/TheElenium'', Martel's minion Kragar is an alcoholic who seems easily controlled with promises of his favorite wine. However, the sequel series reveals Kragar was actually playing up his addiction so the protagonists would underestimate him, and Kragar is far more cunning and self-controlled than suspected. Subverted as the series progresses, as years of drink finally catch up to him. By the end of the series he's an AddledAddict facing terminal liver failure.
* Maddy from ''Literature/EvenIfWeBreak'' was prescribed painkillers after a car accident ruined her chances of getting a lacrosse scholarship. Maddy is autistic, and found that the pills helped a lot with SensoryOverload. They made her feel like she could fit in, and made her future without lacrosse seem less empty and hopeless. She kept taking the pills after she didn't need them, telling her doctor that the pain hadn't decreased. She also found other people's years-old stashes of painkillers from health problems they've recovered from and started taking those, causing her to build up a tolerance. She can still function in school, and doesn't think of herself as addicted until the killer leaves her a note that says "Addict." [[spoiler:Maddy eventually throws away all the pills she brought to the cabin. She is determined not to use again, even after the killer breaks her arm during the final fight.]]
* The protagonist of ''Literature/HeroinStory'' manages to have a successful and respectable career, despite being addicted to opioids for decades.
* In ''Literature/{{The Hike|2023}}'', Joni used to tell herself she only did party drugs now and again, but now she needs a hit of cocaine to get herself hyped up before performances and then weed to calm down and go to sleep afterwards, not to mention taking more drugs and drinking alcohol in between. She realises she has a problem when she wakes up in the morning and the first thing she goes looking for is a bag of coke, as opposed to coffee or breakfast. While she's not yet completely ruled by drugs, Joni is scared of spiralling out of control and becoming an AddledAddict, which is part of the reason she agrees to go on a four-day hiking trip with her friends at the last minute. [[spoiler:Her addiction leads to her impulsively stealing a bag of cocaine from the stash she and her friends find in a cave]].
%%* By all evidence, James O. Incandenza, Jr., of Creator/DavidFosterWallace's ''Literature/InfiniteJest'' was one of these ([[DysfunctionJunction for the Incandenzas]])... until he became a straight-up alcoholic and ended up [[spoiler:baking his head in the family microwave]]. (Administrivia/ZeroContextExample; what evidence was there more specifically that he was functional?)
* ''Literature/MaulLockdown'': CO Smight is a spice addict, but he's capable of doing complicated security scans and escorting a dangerous prisoner with no trouble. He's also [[spoiler:the only one of Jabba's enforcers who infiltrated the prison to escape when Warden Blirr sics a bunch of bloodthirsty gang members on them]].
* Dr. Hetterton from ''Literature/NakedCameTheStranger'' takes morphine to deal with his disappointing career and the wife he's grown to dislike, but is still able to work as a general practicioner and moonlight as an abortionist.
* The brilliant detective ''Literature/SherlockHolmes'' is a cocaine addict, but there was [[ValuesDissonance nothing wrong with it back in Victorian times]]. He apparently needs his fixes only when there aren't any interesting cases to solve. Sir Creator/ArthurConanDoyle was actually ahead of his time when he had Watson give Holmes a tongue-lashing over his habit in ''Literature/TheSignOfTheFour'', and in one of the later stories (written after the harmful effects of cocaine had become more widely known), Watson mentions that Holmes's addiction had eventually gotten bad enough that it had started seriously interfering with his work, upon which he was finally persuaded to quit. Yet even after he kicked the habit, his severe boredom during downtime between cases would always cause Watson to worry about the possibility of a relapse.
* A ClandestineChemist in ''Literature/TheShipWho Partnership'' creates a variation of a FantasticDrug that "cures" AddledAddicts of the original version of the drug, making them capable of working - for ''her'', because they go into painful withdrawal and die if she doesn't regularly supply them with more.
* ''Literature/ASongOfIceAndFire'':
** Tyrion Lannister is frequently depicted drinking and expresses a fondness for it, but is almost always in control of the situation and manages to perform most of his duties. [[spoiler:The fact that his drinking seems to have spiraled out of control at the beginning of ''Literature/ADanceWithDragons'' underscores just how badly events have spiraled out of control for him.]]
** Gregor Clegane is addicted to opium, or "milk of the poppy" as it's called in setting. It doesn't stop him from being one of the most deadly fighters in Westeros. Or really have much of an effect on him at all, seeing his horrible migraines continue with or without the stuff.
* ''Literature/TheStormlightArchive'': The Alethi are afflicted with something called "the Thrill", a nationwide bloodlust that drives them to fight, kill, and conquer. The Alethi make little attempt to rein in the Thrill, and commanders often use it to motivate their troops, letting them descend into controlled bloodlust in battle. Much of Alethi culture makes more sense when you consider that many of them are ''literally'' addicted to killing people, and have constructed their entire society to justify it. The downside of this policy comes to a head in the climax of ''Literature/{{Oathbringer}}'', when [[spoiler:Odium brings Nergaoul (the source of the Thrill) to Thaylen City, driving the entire Sadeas army insane and turning them on the city they were supposed to be defending]].
* ''Literature/{{Temeraire}}'':
** TheAlcoholic Mr. O'Dea is sentenced to transportation and labour in Australia, where he meets Laurence and soon reveals himself to be one of the most dependable and well-rounded members of the crew. This may be due in part to the fact that his employment guarantees him a daily rum ration for good behaviour.
** Ambassador Hammond starts chewing coca leaves in ''Crucible of Gold'' to help his airsickness; by ''League of Dragons'', he is never without a substantial supply, which doesn't stop him from feats like gunning down an obnoxious nobleman in a duel.
* ''Literature/ToSailBeyondTheSunset'': Maureen Johnson is addicted to casual sex, yet she still lives a wholesome life.
* A running feature of the "Michael Shayne" series of detective novels was how Shayne could down enormous amounts of alcohol, usually cognac, while going about his day and investigating cases. This is taken to an extreme in Shayne #3, ''Literature/TheUncomplainingCorpses''. Shayne goes back home after finding out about the Thrip/Darnell murders and starts pounding cognac in the morning. By noon he's already downed a full bottle of cognac and is into a second one. He then takes the second bottle with him when he goes out to investigate the case. He proceeds to take the cognac bottle (his second of the day, this still in early afternoon) out of his pocket and chug it during his interview with suspect Mona Tabor. Later he's still downing cognac while on the job, while reflecting how "mental stimulus" sobers him up. And after that he's downing port wine—his third liquor bottle of the day--at a club while looking for another suspect.
[[/folder]]

[[folder:Live-Action TV]]
%%* ''Series/TwentyFour'': Jack Bauer battles a heroin addiction after having to go undercover as a junkie just before Season 3, but remains functional. (Administrivia/ZeroContextExample; how is he functional, more specifically?)
* Max in ''Series/TwoBrokeGirls'' makes no secret of the fact that she's been drinking and doing drugs for most of her life, and is rarely completely sober, but she's still able to work up to twenty hours a day.
* In ''Series/{{Arrow}}'' [[Arrow/SeasonTwo Season 2]], Laurel; having turned to alcohol and other drugs to deal with repeated trauma, grief, and guilt; is initially this. Several other characters are noticeably worried, but she manages to balance her addition and job as an ADA. Then Sebastian Blood exposes the fact that she's illegally self-medicating when he realizes that she knows that he's a VillainWithGoodPublicity, leading to her being fired from the DA's office ''and'' facing a review from the Bar Association. Lacking a reason to ''be'' functional, she quickly stops being functional and spirals.
* ''Series/BabylonFive'': Londo is a more-or-less functional addict, holding down his job despite heavy drinking and gambling; as his arc grows progressively darker, the gambling and the drinking both taper off, except when he's drinking [[spoiler:to put his Keeper to sleep]]. Keep in mind that sobriety and teetotalism is regarded as a ''vice'' in Centauri society. Presumably, many in the royal court and governing assembly are functional addicts. Londo states in one episode that since Centauri always have duties to consider, they turned the pursuit of pleasure into another of their duties, one which must be performed diligently. So drinking is literal SeriousBusiness for them.
%%** Doctor Stephen Franklin is addicted to Stims during the third season, having started on them in the second season to keep up with the crushing burden of running an understaffed hospital and dealing with the many crises that occur on the station. When he nearly [[MyGodWhatHaveIDone gets a patient killed]] due to being strung out from lack of rest and having dangerous amounts of the stuff in his system, [[spoiler:he tenders his resignation and goes on a [[WalkingTheEarth walkabout]] to detox]]. (Administrivia/ZeroContextExample; in what way more specifically is he functional [presumably ''before'' getting a patient killed]?)
* ''Series/BreakingBad'':
** Jesse starts out this way, mainly a pot smoker who occasionally dabbles in meth while still functioning close to normal, [[spoiler:at least until his girlfriend gets him hooked on heroin and he turns into a junkie]].
** Andrea is a much more straight example. She is clearly a meth-head, but it doesn't stop her from forming relationships or being a responsible and loving parent. It appears that she's outright stopped using after she and Brock move into a new (safer) home.
* ''Series/TheBridge2011'': Henrik takes pills for insomnia, then takes stimulants to counteract the strong sleep aids and get through the day. He does not get high, and it does not affect his professional performance negatively. [[spoiler:However, his illegally obtaining the stimulants opens him up to blackmail; he can't quit without going through withdrawal; and eventually he overdoses.]]
* ''Franchise/{{Buffyverse}}'': After being cast out of Angel Investigations in ''Series/{{Angel}}'' Season 3, Wesley starts drinking heavily, and again in Season 5 [[spoiler:after Fred's death]]; in the latter case, Spike himself sniffs out that Wesley's been getting hammered constantly. Despite this, he's still able to keep fighting the good fight on both occasions.
%%** A big part of Willow's character arc in ''Series/BuffyTheVampireSlayer'' Season 6 is her becoming [[AddictiveMagic addicted to using magic]]. Buffy even notes that Willow has an "addictive personality". (Administrivia/ZeroContextExample; in what way does she remain functional?)
* ''Series/CallTheMidwife'' has [[spoiler:Nurse Beatrix "Trixie" Franklin, a seemingly bubbly glamour girl who is -- although genuinely trying to be happy, positive, and having a good time -- also hiding a childhood with a ShellShockedVeteran father where she was one of a very small number of good things in his life. While her drinking is always seen as a little on the high side, it doesn't affect her work until Series 4, when she runs into several major crises at once.]]
* In ''Series/{{Charite}}'', Doctor Behring tries to treat his psychological issues with Laudanum. He also attempts withdrawal a few times, but on those occasions, he winds up with shaky hands and thus useless as a surgeon, and his mood swings get worse to the point of a total emotional breakdown.
* A number of characters on ''Series/{{Cheers}}'' could be considered high functioning alcoholics -- excluding Sam, a teetotaller due to his past experiences with the bottle. Norm Peterson might be the prime example. He's able to keep up with his accounting job for years despite the alarming amount of time he spends getting soused at the bar. One episode has the characters trying to convince Sam to let Norm do his taxes. Sam doesn't want him to, not because he thinks Norm will screw it up, but because he doesn't want to have to figure out what to do with a massive refund. When he loses his job it has nothing to do with his drinking, and he rebounds into a successful house painting career.
* ''Series/{{Community}}'': In the last season, Jeff has slipped farther into alcoholism and depression, but is still able to do his job without much trouble. He doesn't seem to understand what the word "alcoholic" actually means, as when Frankie calls him a "functional alcoholic" he thinks it's an oxymoron.
* Played with in ''Series/DarkAngel''. A flaw in Max's engineered genetics means she has [[http://en.wikipedia.org/wiki/Tryptophan tryptophan]] deficiencies. Without ''large'' regular doses, she has crippling muscle spasms. Because of the state of America AfterTheEnd, the stuff is expensive and hard to come by -- though not ''quite'' as much as the steady supplies of chocolate, milk, yogurt, red meat, eggs, fish, poultry, and/or peanuts she'd need to get by without supplements. Because she keeps her condition a secret from her friends, they think she's addicted to recreational drugs and throw away her pills before even confronting her. It comes across as kind of a dick move, though it doesn't help that she won't even explain herself even when they stage an intervention for her.
%%* ''Series/{{Dexter}}'': Obviously not addicted to a "drug", but still battles with an addiction of sorts and maintains a "normal" lifestyle. Played with, however, when Dexter is forced to go to NA and uses his "addiction" to give his presence authenticity. (Administrivia/ZeroContextExample; what addiction? Assume the person reading isn't familiar with the show.)
* Zig-zagged in ''Series/{{Elementary}}'', given that Franchise/SherlockHolmes is a recovering addict. He claims that he doesn't need a sober companion, anonymous meetings, or a sponsor, saying he's done with drugs. However, various episodes reveal that, at different times, he was either a complete wreck or at the top of his game. In fact, "[[Recap/ElementaryS01E15AGiantGunFilledWithDrugs A Giant Gun Filled With Drugs]]" has his former drug dealer come into town asking Sherlock to find his kidnapped daughter. When he notes that Sherlock doesn't appear to be on the same level as before, he offers Sherlock a hit out of desperation. Sherlock appears to want the bag but then throws the guy out. At the end of the episode, he reveals that he fights the desire every day, and that particular temptation was merely one of many. Later episodes reveal that when his addiction was at its peak, he was barely functional and bungled quite a few cases due to this.
* ''Series/{{ER}}'''s Doug Ross, who from [[Recap/ERS1E01TwentyFourHours the very first episode]] -- where he shows up at the hospital drunk and his coworker's reaction makes it clear that this isn't the first time -- is established to have a drinking problem, but never once admits to being an alcoholic, even when he finally gets his life together. Given that it never causes him any professional problems and he seems less inclined to drink when his life is going well, it's possible that he's just very good at DrowningMySorrows.
* ''Series/AFrenchVillage'': Müller is addicted to morphine he uses for dealing with the pain of an old war injury. Usually he's fine, but when his supply is cut off, he struggles greatly.
* ''Series/GameOfThrones'':
** Tyrion and Cersei both spend an inordinate amount of time with a cup of wine in hand, particularly when they are nervous or upset, but it generally doesn't affect their control of a situation.
** A minor character example is Thoros of Myr. He appears to be at least slightly buzzed, if not actively having a drink, about every time he's on-screen. It doesn't stop him from surviving the harsh sociopolitical climate of Westeros (and being around to revive Beric Dondarrion a half dozen times) but it ''does'' come back to bite him when he joins the ranging party north of the Wall in the penultimate season. He takes a wound and dies overnight from a combination of injuries and hypothermia -- something that may have been avoided had the alcohol in his system not dulled his senses.
* ''Series/GLOW2017'': Sam Sylvia drinks and does cocaine daily. He sometimes falls into more AddledAddict territory during crises.
* ''Series/{{Hannibal}}'': When Zeller makes a comment about recovering alcoholics in Jimmy Price's presence and belatedly apologizes, Price only quips, "Oh, I'm not recovering." Nonetheless, he's a dependable FBI crime scene investigator and his addiction doesn't get any screen time.
* ''Series/{{Heroes}}'': {{Exaggerated|Trope}} with heroin addict Isaac Mendez, who is actually ''most'' functional when he is using heroin, as he has precognitive abilities that only work when he is.
%%* ''Series/{{Hightown}}'' has several: (Administrivia/ZeroContextExample; what are they addicted to?)
%%** Jackie has a job, a car, a social life, and her own place at the start of the series. She later gets clean.
%%** Junior has a car, job, social life, a baby, and a good relationship with his dad. [[spoiler:He overdoses accidentally after killing someone while attempting to [[DrowningMySorrows ease the guilt with drugs]]]].
* ''Series/{{House}}'': ZigZaggedTrope, prior to season 6 and [[spoiler:his being detoxed at the asylum]], Dr. House bounces between functional, barely functional, and "holy-crap-I-need-my-Vicodin-''right now''." In fact, when they first get House to admit that he's addicted to Vicodin, he refuses to admit that it's a ''problem'', since, he argues, he functions just fine. Late in season 7, [[spoiler:he starts to head for a full-on relapse after dealing with Cuddy's health scare by taking Vicodin. After which she breaks up with him, after which he takes more Vicodin.]] It seems to be up in the air whether he continued taking Vicodin following the events that ended the series.
* ''Series/{{Justified}}'':
** Played with. Detroit mob lieutenant Robert Quarles pops Oxy pills like candy, but he's still shown to be a cunning and ruthless villain. However, as his plans are thwarted by Boyd and/or Raylan, his drug use increases, and his stability and sanity decrease.
** Colton Rhodes is a former military policeman who was kicked out of the army due to drug use. He initially seems to have his drug use under control and quickly becomes TheDragon to Boyd Crowder. However, a few setbacks and having to go against his EvenEvilHasStandards morals causes him to start seriously abusing heroin again and he quickly becomes a wreck. Toward the end of the season he manages to stop using for a bit and he briefly regains his previous competence.
* ''Series/LawAndOrderSpecialVictimsUnit'': Sonya Paxton is eventually revealed as a functioning alcoholic. She's able to disguise her behavior by being a hardass, but eventually she gets so out of control that she's forced to take a breathalyzer test ''in the middle of a trial'' and is [[HumiliationConga subsequently disbarred]]... or rather, suspended. She returns the following season, attending AA meetings and overall putting in a really solid effort not to drink. Ironically, she's actually ''nicer'' when she's sober, even though irritability is an extremely common withdrawal symptom.
* ''Series/{{Leverage}}'':
** [[DiscussedTrope Discussed]] by Nate, who is an alcoholic and still manages to serve as leader for a band of thieves:
--->"I'm a functioning alcoholic, you know? And the trick is not to get hung up on the alcoholic but celebrate the function part of the sentence."
::: : His battle with his addiction is a frequent plot point and major recurring theme throughout the series. It reaches its nadir in "[[Recap/LeverageS01E10TheTwelveStepJob The 12 Step Job]]" when he has to be in a rehab center as part of a con, leading to him genuinely suffering from alcohol withdrawal.
* Many characters are like this in ''Series/MadMen'', particularly around booze. Don Draper himself can usually work well while being an alcoholic, even boozing up at work. However, when characters in this series [[AddledAddict fall down the steep slope of addiction]], they crash hard.
%%* You could make the argument that just about every main character on ''Series/{{MASH}}'' has an alcohol problem. (Administrivia/ZeroContextExample; in what ways are they functional more specifically?)
%%** In one episode Margaret catches an old friend drinking during surgery and busts her. The withdrawal symptoms she goes through are...a bit disturbing. And toward the extreme end, but well within the normal range of alcohol withdrawal symptoms. Alcohol detox (and depressant drug detox in general) is ''nasty''.
%%** In another episode, Hawkeye temporarily quits drinking, just to see if he can. At first, it peps him up, but he becomes irritable and gets on everyone's nerves. Still, he doesn't exhibit truly bad symptoms.
* In the ''Series/MiamiVice'' episode "Theresa", Crockett's titular girlfriend thinks of her opioid addiction as a relatively minor flaw that doesn't interfere with her work as a doctor. [[spoiler:She still winds up selling police information to criminals in order to pay for her addiction.]]
* ''Series/NurseJackie'' is a functional addict to Oxycodone. She regularly snorts or chews it, yet she never shows any signs of inebriation and she is able to work effectively as a nurse. Contrast to her coworker Sam, who is very clearly high at work, including showing no response to pain, having glossy eyes, and showing too much amusement at the way a sheet moves while making a bed.
* ''Series/OddSquad'': [[TheAlcoholic Oprah]] is addicted to [[GRatedDrug juice]] and has up to a thousand juice boxes on the daily (later cutting back to one hundred), but she's perfectly competent and can very much handle her own at work. In fact, when she's forced to cut back on how much juice she drinks in "[[Recap/OddSquadS2E23XsAndOsDrONo Xs and Os]]" due to budget cuts, she goes through severe withdrawal symptoms that make her a weakened TechnicallyLivingZombie who can only cry out for juice by the climax.
* ''Series/{{Pulsaciones}}'': In the first episode Álex Puga can successfully perform more than half of the surgeries in his department due to the drugs he takes allowing him to stay active for longer. However, eventually the SurprisinglyRealisticOutcome occurs and his drug abuse gives him a serious heart attack.
* ''Series/{{Sherlock}}'': The titular character's addictions include nicotine (in the form of patches) and [[InHarmsWay mysteries]]. He can normally function well as long as he has the latter. However, at least one episode has him running around demanding just one cigarette [[AllergicToRoutine when no cases are available]]. There is also this exchange from "[[Recap/SherlockS01E01AStudyInPink A Study in Pink]]" that implies that if Sherlock isn't using currently, he did at some point. (The fact that Lestrade thinks to call it a drugs bust at all also suggests that maybe the police know something that John doesn't.)
-->'''DI Lestrade:''' It's a drugs bust!\\
'''Dr. John Watson:''' Seriously. This guy, a junkie? Have you met him?\\
'''Sherlock Holmes:''' John.\\
'''Dr. John Watson:''' I'm pretty sure you could search this flat all day [[MarriedToTheJob and you wouldn't find anything that you could call recreational]].\\
'''Sherlock Holmes:''' John, you might want to shut up now.\\
'''Dr. John Watson:''' Yeah, but come on... ''[sees Sherlock's expression]'' No...\\
'''Sherlock Holmes:''' What?\\
'''Dr. John Watson:''' ...You?
%%* ''Series/{{Southland}}'': John Cooper starts out needing a lot of painkillers to cope with [[DentedIron chronic pain from a back injury]], and then spends the next three seasons becoming steadily less and less functional until it all comes to a head. [[spoiler:Sherman threatens to report him if he doesn't get some help after catching him stealing evidence.]] Given a truly depressing twist in the next season: [[spoiler:[[CouldHaveAvoidedAllThisPlot After Cooper is finally forced to seek medical assistance, which he'd been refusing to do because he was afraid of being declared unfit for duty, he's pain-free and back at work in a matter of months.]]]] (Administrivia/ZeroContextExample; in what way is he functional at first?)
* ''Franchise/StarTrek'':
** Tasha Yar of ''Series/StarTrekTheNextGeneration'' was born a drug addict, as her mother was an addict who didn't make any attempt to regulate her habit while pregnant. It only gets mentioned a few times (most notably in an episode where she gives a lecture to Wesley on how people get into drugs at all), and she is never shown using.
** Played with in ''Series/StarTrekDeepSpaceNine''. The Jem'Hadar are an entire race of addicts, the Founders having created them with an addiction to a narcotic called "ketracel-white", which contains an enzyme their bodies cannot naturally produce. Jem'Hadar with a steady supply of white are capable of operating normally, but without the white, they suffer from horrifying withdrawal symptoms that include increasing anxiety, an inability to "[[InvisibilityCloak shroud]]", and eventually, berserk rage before their genetic structure ultimately collapses and they die.
** ''Series/StarTrekTheNextGeneration:'' Episode "Symbiosis" revolves around addiction: the Onarans are heavily addicted to felicium, produced by their neighbors, the Brekkans. In the past, both societies had weathered a plague for which felicium was the cure (with addiction as a side effect); the Brekkans knew the Onarans had been cured, but continued to supply the drug to maintain the Onarans' addiction. The Onarans were functional addicts, able to operate spaceships, but not very functional, especially when strung out, and the Brekkan society had devolved to a point where it did little else but produce felicium and live in luxury.
* ''Series/{{Supernatural}}'': A surprisingly realistic example: By Season 4, Dean is drinking heavily in order to self-medicate his [[TraumaCongaLine Hell-induced PTSD]]. He never really quits, but his alcoholism doesn't interfere to any great degree with his ability to function. Bobby and (it's strongly implied) John were also functional alcoholics. It seems to be a [[CrapsackWorld fairly common affliction for hunters]]. The rest of the characters certainly treat it very matter-of-factly.
-->'''Sam:''' Can you even ''get'' drunk anymore? It's sort of like drinking a vitamin for you, right?
%%** Sam is also this [[spoiler:but with [[PsychoSerum demon blood]] instead of alcohol]]. (Administrivia/ZeroContextExample; in what way is he functional more specifically?)
* Played to hilarious effect in the episode "Intervention" of ''Series/{{Titus}}'': Christopher Titus's father Ken, in Titus's words, "never missed a drink, or a joint, or a party, or a chance to get laid in his life. But he also never missed a day of work, or a car payment, or a house payment." The plot of the episode is that Ken has become a shambling mess of a man... because he's ''stopped'' drinking, and the intervention is to get him to ''[[WeWantOurJerkBack start drinking again]]''. So here's a case of a functional addict who's ''only'' functional when he's drunk!
* ''Series/WillAndGrace'': Karen's complete addiction to pills and alcohol is a RunningGag, but she is entirely functional and coherent in her daily life. Oddly, not {{lampshade|Hanging}}d at all in the episode [[HypocriticalHumor where Will gets addicted]] to pain pills.
* ''Series/TheWire'':
** [[CowboyCop Jimmy McNulty]] is a particularly believable example; hard-drinking and described by his best friend as "an emotional train-wreck of a human being", he clearly has many issues, but is still able to come up with creative solutions to hard cases. While he is obviously an alcoholic, it's not until season 5 that his alcoholism is explicitly called such (it mostly gets accepted as typical "cop" behaviour), but in a scene where the FBI are investigating [[spoiler:a fake serial killer [=McNulty=] has invented to gain access to funding that would otherwise be denied to less glamorous cases]]. The FBI only listens to a short piece of [[spoiler:"serial killer"]] [[CreateYourOwnVillain McNulty]] talking, but they use it to nail his personality almost exactly, describing him as an arrogant, high-functioning alcoholic. [[WhatHaveIBecome McNulty]] is visibly shaken by how accurate they are, especially given that he was loudly proclaiming the inaccuracy of FBI profiles not a minute earlier.
** Meanwhile, Detective Bunk Moreland drinks and cheats on his wife almost as much as Jimmy, but unlike Jimmy, we never see his suffer any fallout from his exploits.
** Bubbles is as functional as a homeless heroin junkie can be, which hints at all the squandered potential he had before succumbing to his addiction. He mentors two different homeless youths on how to stay alive on the street, providing a range of schemes for them to make ends meet.
[[/folder]]

[[folder:Newspaper Comics]]
* ''ComicStrip/{{Doonesbury}}'': Duke has consumed an enormous amount of alcohol and other drugs throughout his life, in accordance with the Creator/HunterSThompson caricature he was originally. While few of his many schemes and high-profile jobs have proved successful in the end, that hasn't been due to Duke's substance abuse so much as his arrogance, {{jerkass}}ery, and poor judgment even when sober.
[[/folder]]

[[folder:Podcasts]]
* Sammo and Wink of ''Podcast/MissionToZyxx'' are two highly skilled Rebellion agents who save the heroes' bacon more than once. They are high on Dust in every appearance.
[[/folder]]

[[folder:Professional Wrestling]]
* Wrestling/StoneColdSteveAustin is possibly the best example. A heavy drinker who takes his beer very seriously yet doesn't let it affect his ring work.
* "Hangman" Wrestling/AdamPage, who is rarely seen without a drink in his hand, has mentioned sitting at home with a bottle of whiskey while not working and regularly drinks beer during matches, yet is still able to defend his title.
* Wrestling/{{WCW}} and Wrestling/{{ECW}} icon [[Wrestling/JimFullington the Sandman]] has done pretty well for himself, despite (because of?) smoking a joint and drinking multiple beers on his way to the ring.
%%* Wrestling/JamesStorm, who would ride a motorized beer cooler to the ring. (Administrivia/ZeroContextExample; how is he functional?)
[[/folder]]

[[folder:Roleplay]]
* All vampires in ''This Is War'' count as this, being equally fleshed-out and functional characters as any other species, but needing regular hits of blood to survive.
[[/folder]]

%%[[folder:Theatre]]
%%* The ''Theatre/MrsHawking'' play series: (Administrivia/ZeroContextExample; how are they functional?)
%%** Miss Zakharova with her laudanum habit in part III: ''[[https://vimeo.com/201477887 Base Instruments]]''.
%%** Nurse Violet Strallan is an alcoholic in part VI: ''Fallen Women''.
%%[[/folder]]

[[folder:Video Games]]
* Frank Fontaine from ''VideoGame/BioShock1'' is on ADAM, like the rest of Rapture, but has used just enough of it to survive while avoiding going into full-on Splicer status. [[spoiler:When you corner him at the end, though, he overdoses on all of the ADAM in his possession, becoming superhuman... and utterly insane.]]
* ''VideoGame/Cyberpunk2077'':
** [[{{Deuteragonist}} Johnny Silverhand]] is shown to be taking drugs and abusing alcohol in his memories, as a part of his SexDrugsAndRockAndRoll lifestyle. When he confronts his girlfriend, Alt, after an argument, she will dismiss his apology as him just trying to get some drugs from her. Despite that, he performed on stage with no problems and managed to raid one of the most guarded buildings in the universe with next to no problems. It's possible that a lot of his {{Jerkass}} behavior after [[PlayerCharacter V]] slots a chip with his personality into their head comes from the fact that it's the first time in years he's been sober and he's having withdrawal symptoms. [[spoiler:Later in the story, when V allows him to [[WillingChanneler take over their body]] to talk to Johnny's old friend who can help them]], Johnny will go on a bender during which he drinks and does drugs to the point of [[VomitIndiscretionShot throwing up]] multiple times.
** [[TheRockstar Kerry Eurodyne]], Johnny's bandmate, seems to be in the same boat: Johnny reminisces a couple of times about his and Kerry's exploits while not completely sober, and in the current times, Kerry's house is littered with empty alcohol bottles. V can visit him between missions, and if they ask about what he's been up to lately, he will answer with, "Drinking, mostly. And procrastinating." It's also implied that he does drugs of some kind. This doesn't stop him from (maybe it even helps with) being an international music sensation. We also never see him clearly drunk/high.
** Henry, the third member of Samurai, is outright said to have been drunk and/or high during every single concert they played by Johnny and Kerry. He showed up sober ''once'' and played absolute garbage.
* In ''VisualNovel/DanganronpaV3KillingHarmony'', Miu occasionally references looking for drugs so she could "trip [her] fuckin' balls off" and forget about being trapped in the academy. Whatever its effects, the drugs are likely a factor in Miu's batty behavior, but at the same time, they do not seem to severely impede her ability to invent.
* The Templars of the ''Franchise/DragonAge'' series are essentially this. Their anti-magic powers are strengthened by eating lyrium, which is extremely addictive, but they are still fully capable of using those powers to police the Circle of Magi and hunt down rogue mages. All active-duty templars are functional addicts, but for every one of them, there are several for whom the years of enforced lyrium dependency have led to becoming burnt-out shells. Alistair, a Templar-in-training who became a Grey Warden before taking vows, still has Templar abilities without the lyrium or the addiction.
-->'''Alistair:''' Lyrium just makes Templars' talents more effective, or so I was told. Maybe it doesn't even do that.
* ''Every'' dwarf in ''VideoGame/DwarfFortress'' "needs alcohol to get through the working day". Trying to run a functioning fortress without booze is generally a bad idea, as a sober dwarf will work increasingly slowly and get unhappy thoughts from not having their alcohol, and any alcoholic creature (not just dwarves) will perform tasks just as well as sober ones, except for the occasional incident when they drink too much and start ludicrously deadly bar fights or just die of alcohol poisoning.
* ''VideoGame/TheEndTimesVermintide'' and ''VideoGame/VermintideII'': Markus Kruber's long military career has left him with plenty of memories he drinks to keep at bay. He's a terror on the battlefield but admits that he hasn't been fully sober in twenty years.
* ''Franchise/{{Fallout}}'':
** Using chems can lead to chem addiction, which gives stat penalties while you're in withdrawal. It's not that hard to get by with an addiction, however, as chems tend to be plentiful, and doctors can cure your addiction for a few caps. In the earlier games, it's possible to become addicted to Nuka-Cola. Nuka-Cola withdrawal doesn't even give stat penalties, just messages about how a Nuka-Cola would be nice to have.
** ''VideoGame/FalloutNewVegas'': Rose of Sharon "Cass" Cassidy, one of the potential companions, is an obvious alcoholic (you even find her in a bar, besides several empty bottles of whiskey) that mentions getting in bar fights often and even making moonshine when she doesn't have anything to drink on the road. Not only does she still [[BeautyIsNeverTarnished look good]] despite that, she's also capable of shooting and fighting well like any other companion. Her companion perk, Whiskey Rose, even has the potential of turning you into a functional addict as well by giving a bonus for drinking whiskey and removing the penalties from alcohol addiction.
** ''VideoGame/Fallout4'':
*** John Hancock, a possible companion of the player character, abuses every chem in the Commonwealth (and even became a ghoul originally after taking a hit of an experimental radioactive drug) but it never fazes him one bit. How much of this is due to using chems for so long, or his ghoul physiology, is unknown.
*** Cait, a human companion, is also an addict who is nonetheless fearsome in the heat of battle, but in her case, it's treated as a legitimate problem [[spoiler:for which she eventually seeks assistance from the Sole Survivor in curing, if she ends up liking them enough]]. Depending on the player's actions, this can become a case of CompressedVice, since the player may have Cait accompanying them constantly, and never see her taking chems. There's even a dialogue option to mention this. Cait shrugs it off by stating that she makes sure the Sole Survivor can't see her when she's taking chems.
* Manuela from ''VideoGame/FireEmblemThreeHouses'' drinks heavily, and she can be found drunk outside of classes a couple times (whether mentioned or actually shown). However, that aside, it doesn't seem to interefere with her ability to teach, since it's never mentioned to cause trouble with her lectures.
* ''VideoGame/GrandTheftAuto'':
** Anthony "Gay Tony" Prince from ''VideoGame/GrandTheftAutoIVTheBalladOfGayTony'' is pretty much constantly off his ass on cocaine. And he somehow manages to run two of Liberty City's hottest nightclubs.
** Trevor Philips from ''VideoGame/GrandTheftAutoV'' is a psychotic meth-head, alcoholic, and gasoline huffer. He's also a crack pilot, and pretty much rules the meth scene in the desert almost single-handedly, gleefully stating that meth keeps him young.
* ''VideoGame/HeavyRain'': Norman Jayden is apparently a functional addict of Triptocaine [[spoiler:(however, ARI is what's actually causing the withdrawal effects)]], though he can die from overuse. Despite how it can interfere with his work and personal safety, he is the most competent officer of the police station (player involvment aside).
* Miss Applegate from ''VideoGame/{{Kindergarten|2017}}'' is addicted to the pills the principal gives out to nosy children, but while she is indeed a terrible teacher and person, this is for reasons unrelated to her addiction. There is only one time where her addiction affects her overall performance, which is [[spoiler:during morning time, where giving her some pills makes her lenient towards you raiding your classmates' cubbies]]. This all changes in ''VideoGame/Kindergarten2'' though, where she's been cut off following [[spoiler:the principal's death]]. Even a day off the pills has her both physically and mentally ravaged; she shows very little restraint in her violent tendencies, cares even less about her job, has a massive screaming and sobbing meltdown if pushed too hard, and is not above threatening or carrying out murder when the opportunity to get new pills arises.
* ''VideoGame/{{Lisa}}'' has party members who are often addicted to [[FantasticDrug Joy]], which has a lot of nasty withdrawal symptoms that more often than not render the party member useless. The two exceptions are Brad and Carp, who still can hold their own while in withdrawal. The latter retains good attack power, has awesome agility to start with, and his Fevr River skills are incredibly useful despite his withdrawal.
* ''VideoGame/MaxPayne'', arguably. The painkillers are not just a gameplay mechanic, but per WordOfGod, Max has a genuine addiction to them. He still manages to do his job, or at least shoot straight. Which, in Max's case, makes up about 95% of his functionality. Deconstructed in ''VideoGame/MaxPayne3'': The painkillers and alcohol (and V drug) combined make Payne superhuman when fighting normal mooks, but half of Payne's problems and failures throughout the game wouldn't have happened if he didn't have a serious need to drink himself stupid. Most notably, Mrs. Branco (his boss's trophy wife) might have stayed alive if Max wasn't busy drinking instead of doing his job as a bodyguard.
* ''VideoGame/MetalGear'': In ''VideoGame/MetalGearSolid2SonsOfLiberty'', Solid Snake wryly notes that his "retirement" consisted of him being "holed up in the middle of nowhere in Alaska, drinking too much." He was still, however, able to properly raise and race an absurd number of huskies during that time, and when called back to do the mission on [[VideoGame/MetalGearSolid Shadow Moses]], he seems to suffer from no ill effects from being away from alcohol over a 24-hour period. As well as this, Snake is a heavy smoker for the entirety of the series; it's only when his health begins to fail him in ''VideoGame/MetalGearSolid4GunsOfThePatriots'' that the other characters become concerned and insist that he quit, despite his refusal to do so (the logic being that if he's [[spoiler:going to die soon anyway]], what harm could it do now?). [[spoiler:He does eventually quit, however.]]
* In ''VideoGame/{{Piss}}'', Moira functions well enough to maintain her job as a mercenary, despite a severe drinking problem.
* ''VideoGame/StardewValley'':
** Pam (bus driver) and Shane (Joja Mart stocker) are both alcoholics with jobs, and both jobs are affected more by your actions (funding the bus repairs/driving Joja Mart out of business) than by the drink. The same can ''not'' be said for their personal lives; Pam's husband left her and her daughter is TheResenter, and Shane is suicidally depressed.
** Sebastian's smoking ([[GettingCrapPastTheRadar implied to be marijuana]]) doesn't affect his programming work, and the only time he even tries to quit is if you marry him and have children, since he doesn't want to set a bad example for them.
* ''VideoGame/{{Stellaris}}'' {{implie|dTrope}}s this with leaders who develop the "Substance Abuser" trait. The description notes that the leader has turned to substance abuse (the specific substance being left to the player's imagination) [[INeedAFreakingDrink to cope with the stresses of their position]]. While it noticeably shortens their lifespan, they're not any worse at doing their job until they shuffle off the mortal coil.
* ''VideoGame/TheWolfAmongUs'': Bigby smokes and drinks a lot, but it doesn't stop him from doing his job. That's because those habits help keep the wolf at bay.
* High Elves in ''VideoGame/WorldOfWarcraft'' were essentially too addicted to magic and functioned for generations by sustaining themselves on the magic of their sacred Sun Well, but when the Sun Well was destroyed their entire race descended into withdrawal and they became the Blood Elves. The Blood Elves started siphoning fel magic from demons to soothe their withdrawal and a faction of them even enslaved an angelic entity to feed off of it. Player Character Blood Elves up to restoration of the Sun Well were functional addicts, and various forms of degenerate blood elves who had descended too deeply into their depraved addictions were common antagonists in the ''Burning Crusade'' expansion.
[[/folder]]

[[folder:Visual Novels]]
* ''VisualNovel/{{Last Chance in Xollywood}}'': Greemu the sound designer, a bird-like alien, is this, for a certain degree of "functional". She has a messy personal life, so she vapes all the time, takes uppers to get through the day and drinks a lot to help her sleep at night. If the player chooses to talk with her at the wrap party, when the movie is completed, they can talk her into doing something about her addictions, though she says "not all three at the same time".
[[/folder]]

[[folder:Web Comics]]
* ''Webcomic/{{Imp}}'': Celina appears to be addicted to alcohol, but seems to have no problem staying sober when she's away from home, according to her imp.
%%* ''Webcomic/{{Irrelevator}}'': The green stickman is a meth addict who's functional, but he's still pretty stupid most of the time. (Administrivia/ZeroContextExample; how is he functional more specifically?)
* ''Webcomic/StringTheory2009'': Dr. Schtein, without a doubt. Considering all the drugs he's on, it's astonishing he can manage to walk, let alone work as a super-scientist for the government.
-->'''Schtein:''' I sometimes take amphetamines. You know, to stay alert... but that's more of a casual use thing... Um, then... sometimes I take sleeping pills. You know, the speed sort of keeps me awake. Maybe a little pot, and if someone offered me coke at a party I wouldn't exactly say no, uh... Spent an entire weekend when I was nineteen tripping balls on Ayahuasca... that's not important though, is it?
[[/folder]]

[[folder:Web Original]]
%%* ''WebVideo/DreamMachine'': Ryan for the previous fifteen years of his career — until he wasn't functional anymore. (Administrivia/ZeroContextExample; what was he addicted to, and how was he functional more specifically?)
* ''WebAnimation/HazbinHotel'': Angel Dust is a drug addict and Husk is an alcoholic, but they're mostly coherent and no more comedically sociopathic than the rest of Hell.
* ''LetsPlay/{{Mahu}}'': In "Frozen Flame", prince Arius finds a drug den full of stoned orc barbarians with his army. Attempts at communication all fail and soon a battle takes place between the forces of the prince and those orcs, which, high as they might be, manage to group themselves into regiments to face their new foe.
* ''WebAnimation/{{RWBY}}'':
** Qrow Branwen's alcoholism doesn't seem to dull his abilities as a professional Huntsman all that much. He can fight with the best huntsmen, is quick on the uptake, and perceptive. Aside from the occasional bout of severe drinking where he ends up insensible, most of the time he acts like he isn't drunk beyond a slight slur to his speech. In Volume 6, [[spoiler:[[AwfulTruth learning Ozpin's secrets about Salem]]]] [[BrokenPedestal so shatters his faith and trust in Ozpin]] that he quickly stops being functional, with Ruby being increasingly worried about his ability to cope; when the group is attacked by a horde of Apathy Grimm, he is so insensible that he doesn't even notice the danger the girls are in -- they instead have to rescue both themselves and him. By the end of the Volume, he decides to quit for good.
** Willow Schnee, who was driven to heavy alcoholism by her marriage to a cold, abusive CorruptCorporateExecutive, is capable of downing half a bottle of vodka in one go and still holding a perfectly coherent conversation. She also retains the mental faculties to [[spoiler:secretly install cameras throughout Schnee Manor to spy on her husband [[ProperlyParanoid in case he does something truly heinous]]]].
* ''WebAnimation/SonicForHire'': Just everyone in the group, [[Franchise/SonicTheHedgehog Sonic, Tails, Eggman]], and VideoGame/EarthwormJim, occasionally take loads of coke and alcohol, and are still able to remain somewhat competent {{jerkass}}es.
* Parody Janeway in Website/SFDebris's reviews of ''Series/StarTrekVoyager'' survives mostly on a cocktail of coffee, booze, nicotine, and an ever-shifting blend of Romulan marijuana and old-fashioned human cocaine. While it wouldn't be technically accurate to call her "functional", given her status as a MemeticPsychopath, most of her dysfunctions are independent of the drugs and come from her being a cackling supervillain.
* [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=443085 Jhoira]] from WebVideo/TolarianCommunityCollege comes off as one while describing her methods and suggestions for defeating [[BigBad Nicol Bolas]]. Giant robots, super-soldier slave races, and time water...
-->'''The Professor:''' I'm sorry, did you say "Time Water"?\\
'''Jhoira:''' Yeah, you just drink a bunch of it and you find yourself in the future. I drink Time Water like crazy!\\
'''The Professor:''' ''[sniffs at an offered bottle and recoils]'' This is vodka.
* ''Roleplay/WeAreOurAvatars'': Basse is confirmed to be an alcoholic and regularly engages in drug usage. However, she is frankly one of the group's more consistently rational and collected characters.
* Like the [[Creator/HunterSThompson Gonzo-Jounralist he's loosely based off of]], Jarry from ''WebVideo/WelcomeBackPotter'' regularly takes drugs (both mundane and magical), yet is still able to cast magic without a wand.
[[/folder]]

[[folder:Western Animation]]
* ''[[WesternAnimation/{{Arcane}} Arcane: League of Legends]]'': Silco is a regular Shimmer user; he injects a small dose into his eye in order to medicate his infection. However, unlike many other Shimmer users, he doesn't actively seek it out for recreational purposes and sticks to it for medicinal reasons. Due to the painful way it's administered he even seems to dread having to do it, preferring to have Jinx administer the dosage instead.
* ''WesternAnimation/{{Archer}}'':
** Sterling Archer is constantly drunk (or seeking drink due to his high tolerance), yet can still shoot and/or whore his way out of any combat situation. At least three-quarters of said combat situations are egged along (or outright started) by Archer's whoring, lack of social empathy, and addiction [[InHarmsWay to his own adrenaline]]; yet the alcohol itself is (rarely) the direct cause of his woes.
** And of course, he takes after his mother Mallory, who is able to run a private intelligence agency (even if it regularly shoots itself in the foot) with steely nerves and a quick wit while starting each day with a Tom Collins.
** In Season 5, Pam becomes addicted to cocaine, sometimes eating pounds of it in a day. The only problem this causes is to ISIS's finances since they want to sell the stuff; Pam's health isn't affected (in fact, she loses quite a bit of weight) and her behavior is mostly the same barring the comedic rampage she goes into once she gets cut off.
* ''WesternAnimation/{{Disenchantment}}'': In late Part 2 and Part 3, while Bean is still obviously TheAlcoholic, she doesn't get blackout drunk in the streets like she used to, and is able to balance her drinking with getting things done.
%%* Brian on ''WesternAnimation/FamilyGuy'' — if he's not shown holding a drink or in a bar during an episode, chances are that there will be some reference to him smoking weed. (Administrivia/ZeroContextExample; how is he functional?)
* Bender, and ''WesternAnimation/{{Futurama}}'' robots in general, are essentially a commentary on functional alcoholism, as they [[ExaggeratedTrope literally need alcohol in order to function]], or else their fuel cells run dry and they get uncoordinated, have difficulty speaking, and are prone to erratic behavior. In other words, sobriety is to robots as drunkenness is to humans. Bender could actually survive on mineral oil, but it makes him surly.
* Andre from ''WesternAnimation/InsideJob2021'' is high on almost everything possible and then some, but he's also the head of biochemistry and the resident surgeon [[spoiler:despite the fact that he has no medical degree]]. In fact, he can barely function when he ''isn't'' higher than a weather balloon, as sobriety causes his Tourettes and OCD symptoms to kick in hard.
* ''WesternAnimation/RickAndMorty'':
** Rick is constantly drunk yet remains the most intelligent (albeit idiotic) person in the series no matter how drunk he is. He's also dexterously athletic with lots of stuttering and burping. While the symptoms of extreme alcoholism are apparent, Birdperson is quick to explain that the abusive nature of alcohol is the only thing preventing Rick from committing suicide due to the horrors he has witnessed/committed.
** Parodied with Shrimply Pibbles, effectively an alien version of UsefulNotes/MartinLutherKingJr who needs Jerry's penis as a heart transplant ([[ItMakesSenseInContext just roll with it]]). Jerry finds out that in spite of the man's accomplishments he's a heroin addict and tries to make this public to discredit the man and get out of donating his penis... only for the audience to point out that the atmosphere of Shrimply's planet is 10% heroin and the man isn't addicted; his species needs to breathe heroin to survive. Naturally the audience quickly surmises Jerry's intentions and proceed to boo him off stage.
* Homer from ''WesternAnimation/TheSimpsons'' is one, as he can guzzle some truly absurd amounts of beer and still live a (relatively) normal life and work as a power plant safety inspector (which he's incompetent at, but that's for reasons unrelated to his alcoholism). However, DependingOnTheWriter, this can vary greatly.
* Dr Venture on ''WesternAnimation/TheVentureBros'' is described by the creators of the show as "an addict, not a junkie." He needs the pills to function (and take care of his various neuroses) but is never portrayed as pathetic because of that, more as a side-effect of why he's ''really'' pathetic.
[[/folder]]

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