the crack cocaine that users smoke is essentially the same molecule as powder cocaine that users snort, but crack is far more addictive—so much so that when crack became widely available in the 1980s, it took the world of recreational drug use by storm. What’s so “great” about crack that allowed it to take over the cocaine market, and chemically enslave thousands of people? From a scientific perspective, the answer is simple: the rate of onset of action.
