Drug

Drugs are the most useful daily product for any human beings. EVER. They are primary used for controlling your body's conditions by giving effects like healing(medical), waking your ass up for the day (coffee) or controlling your emotions so you won't rage quit on any board games. The most popular drugs are the illegal ones, like cocaine. They are popular among every chaos warband, especially Slaaneshi cultists and that bat-shit insane demonic biker.

On /tg/

When IRL drugs like Krokodil appear on the web for the first time, newfags shitpost on /tg/ and claim it is the work of Chaos. This is followed by nobody giving a fuck.

Drugs in 40k

The ones used by Eversor assassins: The reasons why they wreck shit so much. They consume some sort of special cocktail of combat enhancement drugs and ALL THE ADRENALINE/COKE that allows them go WRYYYYYY and shit on everyone nearby. But these drugs can be used only by Eversor assassins, who have had their immune systems enhanced to the point that they can handle the toxicity of the combat drug. Also has the nice side effect of making the assassin's corpse explode upon death.

Polymorphine: Used by Callidus assassins. This drug can alter their body shape and appearance, allowing them to impersonate other persons, members of the opposite sex, and even humanoid xenos like Orks and Eldar. That's why it is so easy to troll Macha.

The Chirurgeon: Used by that Fabulous Bill. It is a part-sorcerous and part-technological device that acts like some sort of life-support. The device is charged with warp energy and it can used on persons other than Fabius. Naturally, it has the typical consequences of jamming warp-based shit into your bloodstream.

Commorite Stimm-Rack: Another variant of chirurgeon. Sick ass slurpy drug chemical rack things that comes in three different flavors. One of Lucius's prized possessions after winning the contest of sickfuckery in the Dark Eldar arena and installed by the fabulous one himself.
- Laemon Green(Bylestim): Green blood of some lesser daemon with some wraithbone dust to go with it. Yummy!
- Tyranberry Red(Tyrphous): Fucking Tyranid blood. Harvested from their adrenal glands.
- Wych Cola(Serpentin): Drained from the blood of the Dark Eldar wyches.

Combat Drugs: Used by the Emperor's Children and the Dark Eldar, particularly Wyches, to liven up the combat, although only the latter actually have official rules for them. Like all things associated with Chaos and Dark Eldar, can have a variety of useful effects, or go hilariously wrong.

Minor Drugs

Frenzon: A common combat drug that makes people fearless and crazy in combat.

Flects: Bits of glass tainted by the warp which cause a high, as well as warp exposure. Yes, you don't have to eat it or anything, just look at it and you'll get high, and wasted by daemons.

Kalma: If you need to make a man stoned off his ass, this is your drug.

Obscura: Drug introduced in Dan Abnett's works, which spread to become the number one illegal drug of the grimdark future. Either smoked or injected, Obscura causes a pleasant dream-like sensation, but after the high is over leaves the user depressed and wanting more.

Spook: Some sort of quasi-mineral deposit made out of recycled human bodies. It gives a person awesome magical power, or just makes them daemon chow.

Slaught: Makes people much more aware and faster, with the unfortunate side-effect of roid-rage. The Redeemer called it "sacred libation and unguent which gives heart to the terrified".

Stimm: Painkillers for the 41st millennium. Always make sure your Power Armor has enough.

Juvenat Drugs: Extend your life span. Available to the rich and beautiful and others in power, usually Guard generals and nobles. Heavily hinted to be made of children.

Cigar: Why the fuck not? These candy sticks hanging in your mouth prove that you are the manliest of men in the grimdark future. By the 41 millennium, tobacco seems to have been one of the plants that died off when Terra went industrial, and has been replaced with tabac or lho leaves. However, it's only available to the high ranking offcers, the rich and beautiful, and officers with top hats. Cigars are often used for celebrating victory, but this fucker smokes one all the time because he knows you have already lost.

Lho-Stick; Smaller version of cigar, often smoked by measly soldiers who, despite standard issue balls of steel, are not badass enough. It makes up by being as or even more addictive than marijuana, and depending on where you are, you either get shot or given more of this stuff. Go figure.

Warp Dust

Hell-cocaine. But only Kaldor Draigo and Matt Ward sniff it, because THEY MAKE IT HAPPEN. This is probably why Draigo believes he could just burn down some nasty old man's garden or smash into the fortress of impossible. ~~Warp Dust, not even once.~~ Doomrider says you're a faggot.

The Companitas

~~The drug cartel of the 40k~~ A cult of drug-using chaos heretics dedicated to Slaanesh. They used a drug that could induce a hysterical state in the user and could even bring the deceased back to life for short periods. Like all Slaanesh cult, they like to have fun by placing the corpses of the royal imperial citizen in rendering plants to burn the bodies to ash, then placed this ash in air-burst warheads and exploded them all over those cities on the world that remained loyal to the Imperium. Sadly, they were pwned by the Flesh Tearers.

IRL drugs

Krokodil: A homemade drug created by the fucking Russians, "krokodil" is the street name for desomorphine. Because the homemade recipe calls for all sorts of nasty shit like iodine and phosphorous and there's no quality control, the price you pay for a cheap high is Nurgle's blessing: tissue damage that leaves you looking like a discount Plaguebearer.

Cocaine: I DO COCAINE!!!!1!!! Originally used by Colombian natives who chewed the leaves of the coca plant. Your friendly neighborhood drug dealer probably sells the freebase "crack" cocaine, which is a cocaine compound that contains baking soda, sugar, salt, sand, ground glass, and whatever else he can use to bulk out his supply and sell you less for more. Snowflame's weapon of choice.

Bath Salts: Best shit ever created. It turns a person into a Blood Angels or Sons of Malice marine. Not to be confused with actual bath salts.

Mountain Dew: A soda drink known for its high caffeine and sugar. It should be consumed with Doritos in the name of pope Geoff Keighley.

Opium: The dried latex harvested from the opium poppy is one of the oldest drugs known in human history. Morphine is the principal psychoactive component of opium, which has legitimate medicinal uses but most developed nations heavily regulate it. It can be further refined into diacetylmorphine, better known as heroin.

Gallery

Order your warp dust now, and get mindfucked for free!
Warp Dust is GOOOOOOOD.
Slaanesh cults' own equivalent of the Butcher's Nails.
Normally, we would go to rehabilitation centre if we have drug addiction. In the Grimdark future, however, only the commissar can cure your addiction.
Lucius's awesome slurpy. Do not steal!