That would be crack cocaine. Drugs.com has a page on it, search crack cocaine and it should give you a cocaine page on drugs.com .
I used to be addicted to crack cocaine. It makes you feel real peaceful. But depending on how much you smoke or snort, you'll get very paranoid. I remember always saying to "shut the window" and feeling like someone was always behind my shoulder. I hope that kind've sums up a bit of it. But remember to do a search on it here on drugs.com .