What Are the Signs That Someone Is on Cocaine?

Question by Pixie: What are the signs that someone is on cocaine?
There is a good chance that someone close to me is taking crack/cocaine/smack, what are the signs that someone is on it?
As in the sniffing type of drugs.
I’m not the one on crack >.< But there is a great deal of talk with many people that someone in my family is. I don't live with them. Best answer:

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