Cocaine is a powerfully addictive drug of abuse. It is obtained from coca leaves or synthesized from ecgonine or its derivatives. Cocaine, or "coke", is often sold as white, translucent, crystalline flakes or powder ("snuff", "snow"), frequently adulterated with various sugars or local anaesthetics. The powder is sniffed ("snorted") and produces effects within 1-3 minutes that last for about 30 minutes.
Reference: