Final answer:
Cocaine is a tropane alkaloid and stimulant drug that is commonly used as a recreational drug. It can be taken in multiple ways, and when snorted, it is absorbed through the mucous membranes of the nose and reaches the brain quickly. Crack cocaine is a more volatile form of cocaine that can be smoked.
Step-by-step explanation:
Cocaine is a tropane alkaloid and stimulant drug that is most commonly used as a recreational drug. It is obtained from the leaves of two coca species, Erythroxylum coca and Erythroxylum novogranatense. Cocaine can be taken in multiple ways, including snorting, injecting, and smoking. When cocaine is snorted, it is absorbed through the mucous membranes of the nose and reaches the brain quickly. Crack cocaine, which is a form of the drug, is more volatile and can be smoked.