Cocaine is snorted, injected, and smoked (freebase and crack cocaine). Snorting is inhaling cocaine powder through the nose where it is absorbed into the bloodstream through the nasal tissues. Injecting is using a needle to release the drug directly into the bloodstream. Smoking involves inhaling cocaine smoke into the lungs, where it is absorbed into the bloodstream as quickly as when it is injected!
Cocaine is white and looks like a crystalline powder. Cornstarch, crushed or powdered vitamin substances, sugar, and flour are often mixed with cocaine to make the drug less strong. This is called "cutting" the drug. Crack cocaine looks like small (sometimes pink) rocks.
"Crack" is the street name given to cocaine that has been processed from cocaine hydrochloride to a ready-to-use form for smoking. Rather than requiring the more dangerous method of processing cocaine using ether, crack cocaine is processed with ammonia or sodium bicarbonate (baking soda) and water and heated to remove the hydrochloride, thus producing a form of cocaine that can be smoked. The term "crack" refers to the crackling sound heard when the mixture is heated, presumably from the sodium bicarbonate. On the illicit market, crack, or "rock," is sold in small, inexpensive dosage units. Smoking this form of the drug delivers large quantities of cocaine to the lungs, producing effects comparable to intravenous injection. These effects are felt almost immediately after smoking, are very intense, and do not last long.
While powder cocaine can be smoked to some effect (despite common belief otherwise), it is a very inefficient method of ingestion. Because of the high temperatures present when smoking, powder cocaine tends to burn rather than vaporizing. For this reason, freebase cocaine, also known as crack, is created from powder cocaine for smoking. Freebase cocaine vaporizes at smoking temperatures providing more effect with less material, as well as faster onset and a more intense high than powder cocaine..
Effects--- Alot like speed, but "cleaner" and not as long-lasting. Basically it gives a person lots of energy, makes them more alert and more sharp mentally, gives people a "euphoria" thats difficult to explain--- it's sort of a feeling of invincibility with a simultaneous feeling that all is right in the world. Some people say that it's like ecstasy but you love yourself instead of others. Cocaine also has a pleasurable numbing effect (on gums, lips, etc).
Unfortunately, the drug only lasts ~40 min at the most and the crash is very, very bad, with intense cravings, depression, and paranoia. Addiction soon after experimental use is not uncommon.
Basically--- stay away from the devil's dandruff.