Cocaine Hydrochloride is a white powder derived from the leaves of the coca plant. Cocaine used to be sold over the counter in many forms (yes, including Coca Cola!). Crack cocaine is made chemically by altering cocaine powder into crystals or rocks that can be smoked. Cocaine is short-acting (the effects are fairly immediate and peak after 15 to 30 minutes), so users are very motivated to keep getting another hit every 15 to 30 minutes to maintain the buzz.