By Sandee LaMotte When it snows in your nose, you catch cold in your brain." -- poet Allen Ginsberg It has many names -- coke, toot, powder, blow -- and is one of the most addictive stimulants around. Its raw form, the coca leaf, has been chewed and ingested for thousands of years. Cocaine as we know it, a bitter, numbing powder called cocaine hydrochloride, has been around since only the mid-1800s, when it was marketed in toothache drops, sinus pills and nausea powders for pain relief. Back then, doctors also used cocaine as a topical anesthetic for nose, throat and dental surgeries, a practice still in existence today. Although rare, some physicians still use it to stop nosebleeds or to control pain and bleeding during minor nose surgeries, such as sinus surgery. In the late 1800s, cocaine became famous as the primary flavoring in Coca-Cola. In the early 1900s, the soft-drink company replaced it with an extract of the coca leaves -- sans stimulant....