Cocaine is also known as: coke, Charlie, C, snow, blow, a toot, or Bolivan/Peruvian/Columbian marching powder.
Coke's a powerful stimulant (meaning it speeds up the body and its functions) and is made from the leaves of the South American coca shrub. It makes the brain release its natural 'feel good' chemical dopamine.
Coke usually comes as a powder. It's often sold cut with impurities like baking soda, sugar, amphetamines or painkilers.
Freebase and crack (also known as rocks or stones) are both types of cocaine. Crack is cocaine that's be treated to make it smokable. It comes as small, dirty white/light brown rock-like pieces. Crack has a more powerful high than cocaine and is seen as even more addictive.
Both drugs can make you feel physically strong, horny, more sexually aggressive or confident, and with more stamina for longer sessions. Your sense of touch can be heightened, and you might get longer, stronger orgasms.
As your inhibitions are lowered you might be more likely to have unsafe sex.
The drugs' pain-killing effect can lead to rougher sex, making your cock and arse sore or bleed. You might not notice this damage but it makes it easier for HIV, hepatitis C and other infections to be passed on.
Problems getting hard-ons, difficulty coming and less sex drive can be other side effects, especially if the dose is big or you take it for a long time.
Coke's normally divided into lines on a smooth surface, then snorted through a straw or rolled up bank note. Other ways of taking it are smoking it or rubbing it into the gums or arse hole.
Crack is smoked in a pipe, glass tube, plastic bottle or from foil.
A hit with either coke or crack comes on fast, usually within a minute, making you feel exhilarated, alert, full of energy, confident, sociable, talkative and physicaly strong. It stops you feeling hungry or tired and kills pain. Effects last up to half an hour if you snort it (less if it's smoked or injected).
The drugs push up your body temperature, blood pressure and heartbeat, and can cause chest pain and irregular heartbeat even in healthy people. People who use coke or crack are much more likely to have a heart attack than people who don't use them. They're also linked to strokes and seizures.
Come down (or 'crash') symptoms include feeling down, rough, agitated, tired and with a craving for more of the drug.
Sudden death is more likely with large doses but smaller doses can kill, especially if someone has a sensitivity to the drug.
Tolerance builds to both cocaine and crack, with more needed to get the same high. Coke has a reputation for being more addictive than most chems (and crack is seen as even more addictive). The drugs can cause lasting damage to how the brain works and, given the drugs' price, becoming addicted can ruin you financially.
Using cocaine or crack for a long time (or large doses) can cause panic attacks, hallucinations, depression, paranoia and psychosis. Snorting coke can over time destroy the lining of the nose and septum (the skin between nostrils).
Alcohol - using booze together with coke or crack makes the bad effects of both worse and can give you the illusion of being sober when you're drunk. These drugs mix together in the body with alcohol to make cocaethylene, a toxin that damages the brain, liver and heart. This is the reason for the bigger risk of sudden death in people using alcohol and coke or crack together.
Speed, crystal, E, Viagra - mixing these drugs with coke or crack means even more pressure on the heart and circulation, with a bigger risk of stroke, heart attack, etc.
Anti-depressants - taking cocaine or crack when you're on some anti-depressants can cause 'serotonin syndrome'. This could be dangerous and the symptoms are feeling agitated, a fast heartheat, sweating and muscle spasms, and not being able to sleep. Urgent medical help is needed. If you're on anti-depressants check with a doctor before using these drugs.
HIV drugs - as the body processes these differently than cocaine or crack, there are no known dangerous interactions.
If you share straws or bank notes to snort coke tiny amounts of blood could go from the lining of one preson's nose to another. This might possibly spread viruses in blood such as hepatitis C. The same could happen if crack pipes are passed from a mouth with ulcers or burns to another person's mouth.
Rubbing coke into the arse hole will make it numb and irritate the skin. This makes it more likely someone picks up or passes on infections, including HIV.
Rougher, longer sex sessions mean more risk of condoms breaking, so putting on a fresh one after fucking for about 30 minutes is recommended.
These drugs make the heart beat harder and push up blood pressure, so should be avoided if you've got high blood pressure or a heart condition.
They should be avoided by people with a history of mental health problems too.
Cocaine and crack are Class A drugs.
Possession can mean up to seven years in prison and/or an unlimited fine. Intending to supply cocaine (including giving it to mates) can mean up to life in prison and/or and unlimited fine.