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Cocaine affects your brain. The word "cocaine" refers to the drug in both a powder (cocaine) and crystal (crack) form. It is made from the coca plant and causes a short-lived high that is immediately followed by opposite, intense feelings of depression, edginess, and a craving for more of the drug. Cocaine may be snorted as a powder, converted to a liquid form for injection with a needle, or processed into a crystal form to be smoked.

Cocaine affects your body. People who use cocaine often don't eat or sleep regularly. They can experience increased heart rate, muscle spasms, and convulsions. If they snort cocaine, they can also permanently damage their nasal tissue.

Cocaine affects your emotions. Using cocaine can make you feel paranoid, angry, hostile, and anxious, even when you're not high.

Cocaine is addictive. Cocaine interferes with the way your brain processes chemicals that create feelings of pleasure, so you need more and more of the drug just to feel normal. People who become addicted to cocaine start to lose interest in other areas of their life, like school, friends, and sports.

Cocaine can kill you. Cocaine use can cause heart attacks, seizures, strokes, and respiratory failure. People who share needles can also contract hepatitis, HIV/AIDS, or other diseases.

Know the signs...

How can you tell if a friend is using cocaine? Sometimes it's tough to tell. But there are signs you can look for. If your friend has one or more of the following warning signs, he or she may be using cocaine or other illicit drugs:

• Red, bloodshot eyes
• A runny nose or frequent sniffing
• A change in groups of friends
• Acting withdrawn, depressed, tired, or careless about personal appearance
• Losing interest in school, family, or activities he or she used to enjoy
• Frequently needing money

To read more in this article from SAMHSA’s National Clearinghouse for Alcohol and Drug Information, please click here: http://ncadi.samhsa.gov/govpubs/phd640i/

Cocaine image is provided by the DEA