Intravenous drug injection drug?

Use the syringe to intravenous use of is all heroin.. Commonly known as the white powder.. Pure or high purity 4 heroin is a kind of white powder, odorless, transparent, and very sensitive to rub on the skin disappear. But if manufacturing is not good may be light yellow, pink, sandy or brown coarse powder even granule. Intravenous drug users in China. Basically this is the only thing. As for the morphine.. And as these rare..
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